IHB EN 2008-7331170

INSTALLATION MANUAL

Ground source heat pumpNIBE F1255PC

Quick guideNavigation

Ok button (confirm/select)

Back button (back/undo/exit)

Control knob (move/increase/reduce)

A detailed explanation of the button functions can be found on page 34.

How to scroll through menus and make different settings is described on page 36.

Set the indoor climate

2X

INDOOR CLIMATE

HEAT PUMP INFO

HOTWATER

The mode for setting the indoor temperature is accessed by pressing the OK button twice, when in the startmode in the main menu.

Increase hot water volume

2X

1X

To temporarily increase the amount of hot water, first turn the control knob to mark menu 2 (water droplet)and then press the OK button twice.

41 Important information4Safety information

4Symbols

4Marking

5Serial number

5Recovery

5Environmental information

6Inspection of the installation

72 Delivery and handling7Transport

7Assembly

8Supplied components

8Removing the covers

9Removing parts of the insulation

103 The heat pump design10General

12Distribution boxes

13Cooling section (EP14)

144 Pipe connections14General

15Dimensions and pipe connections

16Brine side

16Heating medium side

17Cold and hot water

17Docking alternatives

195 Electrical connections19General

21Connections

22Settings

24Optional connections

27Connecting accessories

296 Commissioning and adjusting29Preparations

29Filling and venting

30Start-up and inspection

32Setting the cooling/heating curve

347 Control - Introduction34Display unit

35Menu system

388 Control - Menus38Menu 1 - INDOOR CLIMATE

38Menu 2 - HOT WATER

39Menu 3 - INFO

39Menu 4 - HEAT PUMP

40Menu 5 - SERVICE

519 Service51Service actions

5710 Disturbances in comfort57Manage alarm

57Troubleshooting

6011 Accessories

6212 Technical data62Dimensions and setting-out coordinates

63Electrical data

64Technical specifications

67Energy labelling

71Item register

75Contact information

3Table of ContentsNIBE F1255PC

Table of Contents

Safety informationThis manual describes installation and service proced-ures for implementation by specialists.

The manual must be left with the customer.

This appliance can be used by childrenaged from 8 years and above and personswith reduced physical, sensory or mentalcapabilities or lack of experience andknowledge if they have been given super-vision or instruction concerning use of theappliance in a safe way and understandthe hazards involved. Children shall notplay with the appliance. Cleaning and usermaintenance shall not be made by childrenwithout supervision.

Rights to make any design or technicalmodifications are reserved.

©NIBE 2020.

Water may drip from the safety valve’soverflow pipe. The entire length of the over-flow water pipe must be routed to a suitabledrain and be inclined to prevent water pock-ets, and must also be frost-proof. The over-flow pipe must be at least the same size asthe safety valve. The overflow pipe must bevisible and its mouth must be open and notlocated close to electrical components.

F1255PC must be installed via an isolatorswitch. The cable area has to be dimensionedbased on the fuse rating used.

SymbolsNOTEThis symbol indicates danger to person or ma-chine .

CautionThis symbol indicates important informationabout what you should consider when installingor servicing the installation.

TIPThis symbol indicates tips on how to facilitateusing the product.

MarkingThe CE mark is obligatory for most products soldin the EU, regardless of where they are made.

CE

Classification of enclosure of electro-technicalequipment.

IP21

Danger to person or machine.!

Read the User Manual.

NIBE F1255PCChapter 1 | Important information4

1 Important information

Serial numberThe serial number can be found at the bottom right ofthe front cover, in the info menu (menu 3.1) and on thetype plate (PZ1).

Serial number

CautionYou need the product's ((14 digit) serial numberfor servicing and support.

RecoveryLeave the disposal of the packaging to the in-staller who installed the product or to specialwaste stations.

Do not dispose of used products with normalhousehold waste. It must be disposed of at a

special waste station or dealer who provides this typeof service.

Improper disposal of the product by the user results inadministrative penalties in accordance with current le-gislation.

EnvironmentalinformationF-GAS REGULATION (EU) NO. 517/2014This unit contains a fluorinated greenhouse gas that iscovered by the Kyoto agreement.

The equipment contains R407C, a fluorinated green-house gas with a GWP value (Global Warming Potential)of 1,774. Do not release R407C into the atmosphere.

5Chapter 1 | Important informationNIBE F1255PC

Inspection of the installationCurrent regulations require the heating installation to be inspected before it is commissioned. The inspection mustbe carried out by a suitably qualified person.

In addition, fill in the page for the installation data in the User Manual.

DateSignatureNotesDescription✔

Brine (page 16)System flushedSystem ventedAntifreezeLevel/Expansion vesselFilterball (particle filter)Safety valveShut off valvesCirculation pump setting

Heating medium (page 16)System flushedSystem ventedExpansion vesselFilterball (particle filter)Safety valveShut off valvesCirculation pump setting

Electricity (page 19)ConnectionsMain voltagePhase voltageFuses heat pumpFuses propertyOutside sensorRoom sensorCurrent sensorSafety breakerEarth circuit-breakerSetting of emergency mode thermostat

NIBE F1255PCChapter 1 | Important information6

TransportF1255PC should be transported and stored vertically ina dry place. When being moved into a building, F1255PCmay be leant back 45 °.

Ensure that F1255PC has not been damaged duringtransport.

CautionThe product can be tail heavy.

Remove the outer panels in order to protect them whenmoving in confined spaces inside buildings.

R

0

R0

EXTRACTING THE COOLING MODULETo simplify transport and service, the heat pump can beseparated by pulling the cooling module out from thecabinet.

See page 53 for instructions about the separation.

Assembly• Place F1255PC on a solid foundation indoors that can

take the heat pump's weight. Use the product's ad-justable feet to obtain a horizontal and stable set-up.

30 - 50 mm

30 - 50 mm

15 - 40 mm

20-55 mm

• Because water comes from F1255PC, the area wherethe heating pump is located must be equipped withfloor drainage.

• Install with its back to an outside wall, ideally in a roomwhere noise does not matter, in order to eliminatenoise problems. If this is not possible, avoid placingit against a wall behind a bedroom or other roomwhere noise may be a problem.

• Wherever the unit is located, walls to sound sensitiverooms should be fitted with sound insulation.

• Route pipes so they are not fixed to an internal wallthat backs on to a bedroom or living room.

INSTALLATION AREALeave a free space of 800 mm in front of the product.Approx. 50 mm free space is required on each side, toremove the side panels (see image). The panels do notneed to be removed during service. All service onF1255PC can be carried out from the front. Leave spacebetween the heat pump and the wall behind (and anyrouting of supply cables and pipes) to reduce the risk ofany vibration being propagated.

(50) (50)

800

**

* A normal installation needs 300 – 400 mm (any side) for connectionequipment, valves and electrical equipment.

7Chapter 2 | Delivery and handlingNIBE F1255PC

2 Delivery and handling

Supplied components

LE

K

LE

K

LE

K

Current sensor1

3 x

Room sensor

1 x

Outside sensor

1 x

LEK

Level vessel1

1 x

O-rings

8 x

LEK

Safety valve0.3 MPa (3 bar)1

1 x

Filterball

1 x G11 x G3/4

Compression ringcouplings

2 x (ø28 x G25)2 x (ø22 x G20)

1 Not Italy and the DACH countries.

LOCATIONThe kit of supplied items is placed in packaging on topof the heat pump.

Removing the coversFRONT COVER

1

2

LE

K

LE

K

LE

K

LE

K

LE

K

1. Remove the screws from the lower edge of thefront panel.

2. Lift the panel out at the bottom edge and up.

SIDE COVERS

LE

K

LE

K

LE

K

The side covers can be removed to facilitate the install-ation.

1. Remove the screws from the upper and loweredges.

2. Twist the cover slightly outward.

3. Move the hatch outwards and backwards.

4. Assembly takes place in the reverse order.

NIBE F1255PCChapter 2 | Delivery and handling8

Removing parts of theinsulationParts of the insulation can be removed to facilitate theinstallation.

INSULATION, TOP1. Disconnect the cable from the motor and remove

the motor from the shuttle valve as illustrated.

LEK

LEK

A

B

LEK

2. Grip the handle and pull straight out as illustrated.

LEK

INSULATION, IMMERSION HEATER

NOTEElectrical installation and service must be car-ried out under the supervision of a qualifiedelectrician. Electrical installation and wiringmust be carried out in accordance with thestipulations in force.

1. Remove the cover for the junction box according tothe description on page 19.

2. Grip the handle and pull the insulation carefully to-wards you as illustrated.

LEK

9Chapter 2 | Delivery and handlingNIBE F1255PC

General

F1255

BT7

QN10

BT2

EB1

UB1

QM34

QM22

UB3

AA4

AA4-XJ3

BT6

UB2

QM32

AA4-XJ4

SF1

QM33

XL1

XL6 XL7

XL4 XL3 XL2

FR1

PF1

PF2

QM31

W130

UN

BT7

QN10

BT2

EB1

PF1

UB1

QM34

QM31

BT6

UB2

QM32

QM33

PF2

QM22UB3

AA4

W130

SF1

AA4-XJ4

AA4-XJ3

XL1

XL6

XL4 XL3

XL7

XL2

FR1

EP14

VIEW FROM ABOVE

XL5 BT7

VIEW FROM BEHIND

BF1

NIBE F1255PCChapter 3 | The heat pump design10

3 The heat pump design

PIPE CONNECTIONSConnection, heating medium flowXL1Connection, heating medium returnXL2Connection, cold waterXL3Connection, hot waterXL4Connection, HWCXL5Connection, brine inXL6Connection, brine outXL7

HVAC COMPONENTSVenting, coilQM22Shut-off valve, heating medium flowQM31Shut off valve, heating medium returnQM32Shut off valve, brine outQM33Shut-off valve, brine inQM34Shuttle valve, climate system/water heaterQN10

SENSORS ETC.Flow meter**BF1Outdoor temperature sensor*BT1Temperature sensors, heating medium flowBT2Temperature sensor, hot water chargingBT6Temperature sensor, hot water topBT7

**Only heat pumps with energy meter

* Not illustrated

ELECTRICAL COMPONENTSDisplay unit

AA4-XJ3 USB socket

AA4-XJ4 Service outlet (No function)

AA4

Immersion heaterEB1El. anode*FR1SwitchSF1Network cable for NIBE UplinkW130

* Only heat pump with enamelled vessel.

MISCELLANEOUSCooling sectionEP14Rating platePF1Type plate, cooling sectionPF2Cable gland, incoming electricityUB1Cable glandUB2Cable gland, rear side, sensorUB3

Designations according to standard EN 81346-2.

11Chapter 3 | The heat pump designNIBE F1255PC

Distribution boxes

UN

F1255

FD1

AA8

AA1

FA1

AA3

AA23

AA2

AA7

FQ10

AA1

FC1

AA3

AA23

AA2

AA7

AA8

ELECTRICAL COMPONENTSImmersion heater cardAA1Base cardAA2Input circuit boardAA3Extra relay circuit boardAA7Electrical anode board1AA8Communication boardAA23Miniature circuit-breakerFC1Temperature limiter/Emergency mode thermostatFQ10

1 Only heat pump with enamelled vessel.

NIBE F1255PCChapter 3 | The heat pump design12

Cooling section (EP14)1 x 230 V, 3 x 400 V, 6 kW

LEK

LEK

BT12

EP6

BT3

GP1

GP2

QM2

QM1

AA100

BT10

BT11

QN18

1 x 230 V, 3 x 400 V, 6 kW

LEK

LEK

EP2

BT14QA40

BT17

CA1

RA1

BT15

BP1

BP2

EB10

EP1

GQ10

HS1

XL20

QN1

XL21

PIPE CONNECTIONSService connection, high pressureXL20Service connection, low pressureXL21

HVAC COMPONENTSCirculation pumpGP1Brine pumpGP2Drainage, climate systemQM1Draining, brine sideQM2

SENSORS ETC.High pressure pressostatBP1Low pressure pressostatBP2Temperature sensors, heating medium returnBT3Temperature sensor, brine inBT10Temperature sensor, brine outBT11Temperature sensor, condenser supply lineBT12Temperature sensor, hot gasBT14Temperature sensor, fluid pipeBT15Temperature sensor, suction gasBT17

ELECTRICAL COMPONENTSJoint cardAA100Compressor heaterEB10InverterQA40

COOLING COMPONENTSEvaporatorEP1CondenserEP2Heat exchanger, coolingEP6CompressorGQ10Drying filterHS1Expansion valveQN1Mixing valve, coolingQN18

13Chapter 3 | The heat pump designNIBE F1255PC

GeneralPipe installation must be carried out in accordance withcurrent norms and directives. F1255PC can operate witha return temperature of up to 58 °C and an outgoingtemperature from the heat pump of 70 (65 °C with onlythe compressor).

F1255PC is not equipped with external shut off valves;these must be installed to facilitate any future servicing.

CautionEnsure that incoming water is clean. Whenusing a private well, it may be necessary tosupplement with an extra water filter.

CautionAny high points in the climate system, mustbe equipped with air vents.

NOTEThe pipe systems need to be flushed out be-fore the heat pump is connected so debriscannot damage component parts.

NOTEWater may drip from the safety valve’s over-flow pipe. The entire length of the overflowwater pipe must be routed to a suitable drainand be inclined to prevent water pockets, andmust also be frost-proof. The overflow pipemust be at least the same size as the safetyvalve. The overflow pipe must be visible andits mouth must be open and not located closeto electrical components.

NOTEThe climate system must be adjusted for bothheating and cooling operation.

NIBE F1255PCChapter 4 | Pipe connections14

4 Pipe connections

SYMBOL KEY

SYSTEM DIAGRAMF1255PC consists of a heat pump, water heater, elec-trical module, circulation pumps and a control system.F1255PC is connected to the brine and heating mediumcircuits.

In the heat pump evaporator, the brine (water mixedwith anti-freeze, glycol or ethanol) releases its energyto the refrigerant, which is vaporised in order to becompressed in the compressor. The refrigerant, of whichthe temperature has now been raised, is passed to thecondenser where it gives off its energy to the heatingmedium circuit and, if necessary, to the water heater.If there is a greater need for heating/hot water than thecompressor can provide there is an integrated immersionheater.

The brine can also be circulated via a mixing valve to aheat exchanger. There the brine cools the heating sys-tem's water so that comfort cooling can be maintainedduring the hotter periods of the year.

VVKVKBinVBf VBrKBut

XL1 XL6 XL7XL4 XL3 XL2

VVKVKBinVBf VBrKBut

Connection, heating medium flowXL1Connection, heating medium returnXL2Connection, cold waterXL3Connection, hot waterXL4Connection, brine inXL6Connection, brine outXL7

Dimensions and pipeconnections

620

600

560 440

70

1775

650*

25-5

0

25

50

130

210

390

470

525

650*

620

600

560 440

70

1775

650*

25-5

0

25

50

130

210

390

470

525

650*

XL1 XL6 XL7XL4 XL3 XL2

PIPE DIMENSIONS

Connection

28(mm)(XL6)/(XL7) Brine in/out ext Ø

22(mm)(XL1)/(XL2) Heating medium flow/returnext Ø

22(mm)(XL3)/(XL4) Cold/hot water Ø

* Can be angled for side connection.

15Chapter 4 | Pipe connectionsNIBE F1255PC

Brine sideCOLLECTOR

CautionThe length of the collector hose varies depend-ing on the rock/soil conditions, climate zoneand on the climate system (radiators or under-floor heating) and the heating requirement ofthe building Each installation must be sized in-dividually.

Max. length per coil for the collector should not exceed400 m.

In those cases where it is necessary to have severalcollectors, these should be connected in parallel withthe possibility for adjusting the flow of the relevant coil.

For surface soil heat, the hose should be buried at adepth determined by local conditions and the distancebetween the hoses should be at least 1 metre.

For several bore holes, the distance between the holesmust be determined according to local conditions.

Ensure the collector hose rises constantly towards theheat pump to avoid air pockets. If this is not possible,airvents should be used.

Because the temperature of the brine system can fallbelow 0 °C, it must be protected against freezing downto -15 °C. When making the volume calculation, use 1litres of ready mixed brine per metre of collector hose(applies when using PEM-hose 40x2.4 PN 6.3) as a guidevalue.

SIDE CONNECTIONIt is possible to angle the brine connections, for connec-tion to the side instead of top connection.

To angle out a connection:

1. Disconnect the pipe at the top connection.

2. Angle the pipe in the desired direction.

3. If necessary, cut the pipe to the desired length.

CONNECTING THE BRINE SIDE• Insulate all indoor brine pipes against condensation.

• The level vessel must be installed as the highest pointin the brine system on the incoming pipe before thebrine pump (Alt. 1).

If the level vessel cannot be placed at the highestpoint, an expansion vessel must be used (Alt. 2).

NOTENote that condensation may drip from the levelvessel. Position the vessel so that this doesnot harm other equipment.

• Details of the antifreeze used must be shown on thelevel vessel.

• Install the enclosed safety valve below the level vesselas illustrated.

• Install a shut off valve for outgoing brine as close tothe heat pump as possible.

• Fit the enclosed filterball on the incoming brine.

TIPIf filling connection KB25/KB32 is used, theenclosed filterball does not need to be fitted.

In the case of connection to an open groundwater sys-tem, an intermediate frost-protected circuit must beprovided, because of the risk of dirt and freezing in theevaporator. This requires an extra heat exchanger.

P

-QZ20

Alt. 1 Alt. 2

XL6

XL7

Heating medium sideCONNECTING THE CLIMATE SYSTEMA climate system is a system that regulates indoorcomfort with the help of the control system in F1255PCand for example radiators, underfloor heating/cooling,fan convectors etc.

• Install all necessary safety devices, shut-off valves (asclose to the heat pump as possible) and the enclosedfilterball.

NIBE F1255PCChapter 4 | Pipe connections16

• Fit safety valve on heating medium return as illus-trated. Recommended opening pressure is 0.25 MPa(2.5 bar). For information about max opening pressure,see technical specifications.

• When connecting to a system with thermostats on allradiators (or underfloor heating coils), either a bypassvalve must be fitted or some of the thermostats mustbe removed to ensure there is sufficient flow.

P

XL1

XL2

Cold and hot waterCONNECTING COLD AND HOT WATER• Fit shut-off valve, non-return valve and safety valve as

illustrated.

• The safety valve must have max. 1.0 MPa (10.0 bar)opening pressure, and be installed on the incomingdomestic water line as shown.

• A mixer valve must also be installed, if the factorysetting for hot water is changed. National regulationsmust be observed.

• The setting for hot water is made in menu 5.1.1 (page41).

XL3

XL4

Docking alternativesF1255PC can be connected in several different ways,some of which are shown below.

Further option information is available at nibe.eu and inthe respective assembly instructions for the accessoriesused. See page 60 for a list of the accessories that canbe used with F1255PC.

BUFFER VESSELIf the climate system volume is too small for the heatpump output, the radiator system can be supplementedwith a buffer vessel, for example NIBE UKV.

EXTRA HOT WATER HEATERSThe system should be supplemented with an extra waterheater, if a large bath tub or other significant consumerof hot water is installed.

Water heater with immersion heaterIf it is possible to use a water heater with an immersionheater, connect it as illustrated below.

GROUND WATER SYSTEMAn intermediate heat exchanger is used to protect theheat pump's exchanger from dirt. The water is releasedinto a buried filtration unit or a drilled well. See page 27for more information about connecting a ground waterpump.

If this docking alternative is used, "min. brine out" inmenu 5.1.7 "br pmp al set." must be changed to a suit-able value to prevent freezing of the heat exchanger.

-EP12-GP3

-EP12-HQ40

-EP12-EP4-EP12-AA25

-EP12

17Chapter 4 | Pipe connectionsNIBE F1255PC

VENTILATION RECOVERYThe installation can be supplemented with the exhaustair module NIBE FLM to provide ventilation recovery.

• Pipes and other cold surfaces must be insulated withdiffusion-proof material to prevent condensation.

• The brine system must be supplied with a pressureexpansion vessel. If there is a level vessel this shouldbe replaced.

P

TWO OR MORE CLIMATE SYSTEMSIn buildings with several climate systems that requiredifferent supply temperatures, the accessoryECS 40/ECS 41 can be connected. A shunt valve thenlowers the temperature to the underfloor heating sys-tem, for example.

-EP21-RM1

-EP21-GP10-EP21-BT2-EP21-AA25

-EP21-BT3

-EP21-QN25

-EP21

POOLWith the POOL 40 accessory, you can heat the poolwith your heat pump.

During pool heating, the heating medium circulatesbetween the F1255PC and the pool exchanger usingthe heat pump’s internal circulation pump.

-CL11-HQ4-CL11-BT51-CL11-GP9

-CL11-EP5-CL11-QN19

-CL11-AA25

-CL11

NIBE F1255PCChapter 4 | Pipe connections18

GeneralAll electrical equipment, except the outdoor sensors,room sensors and the current sensors are ready connec-ted at the factory.

• Disconnect the heat pump before insulation testingthe house wiring.

• F1255PC is not reconnectable between 1-phase and3-phase.

• If the building is equipped with an earth-fault breaker,F1255PC should be equipped with a separate one.

• If a miniature circuit breaker is used this should haveat least motor characteristic “C”. See page 64 for fusesize.

• Electrical wiring diagrams for the heat pump, seeseparate installation handbook for electrical wiringdiagrams.

• Communication and sensor cables to external connec-tions must not be laid close to high current cables.

• The minimum area of communication and sensorcables to external connections must be 0.5 mm² upto 50 m, for example EKKX or LiYY or equivalent.

• When cable routing in F1255PC, cable grommets (e.g.UB1-UB3, marked in image) must be used. InUB1-UB3 the cables are inserted through the heatpump from the back to the front.

NOTEThe switch (SF1) must not be moved to "" or" " until the boiler has been filled with water.Components in the product could be damaged.

NOTEElectrical installation and service must be car-ried out under the supervision of a qualifiedelectrician. Cut the current with the circuitbreaker before carrying out any servicing.Electrical installation and wiring must be carriedout in accordance with the stipulations in force.

NOTECheck the connections, main voltage and phasevoltage before the machine is started, to pre-vent damage to the heat pump electronics.

F1255

FQ10

FC1

FQ10-SF2

UB2

UB1

UB3

MINIATURE CIRCUIT-BREAKERThe heat pump operating circuit and some of its internalcomponents are internally fused by a miniature circuitbreaker (FC1).

TEMPERATURE LIMITERThe temperature limiter (FQ10) cuts the power to theelectric additional heat if the temperature exceeds 89°Cand is reset manually.

ResettingThe temperature limiter (FQ10) is accessed behind thefront cover. Reset the temperature limiter by pressingthe button (FQ10-SF2) using a small screwdriver.

ACCESSIBILITY, ELECTRICAL CONNECTIONThe plastic cap of the electrical boxes is opened usinga screwdriver.

19Chapter 5 | Electrical connectionsNIBE F1255PC

5 Electrical connections

NOTEThe cover for the input card is opened withouta tool.

Removing the cover, input circuit board

1

2

1. Push the catch down.

2. Angle out the cover and remove it.

Removing the cover, immersion heater circuitboard

1

2

A

B

1. Insert the screwdriver (A) and pry the catch carefullydownwards (B).

2. Angle out the cover and remove it.

Removing the cover, base board

CautionTo remove the cover for the base board, thecover for the input circuit board must first beremoved.

LEK

1

LEK

1

A

B

2

2

3

1. Disconnect the switches using a screwdriver.

2. Insert the screwdriver (A) and pry the catch carefullydownwards (B).

3. Angle out the cover and remove it.

CABLE LOCKUse a suitable tool to release/lock cables in the heatpump terminal blocks.

LE

K

1

1

2

2

3

3

1

2

3

3

4

1

2LE

K

1

1

2

2

3

3

1

2

3

3

4

1

2

1

2

NIBE F1255PCChapter 5 | Electrical connections20

ConnectionsNOTETo prevent interference, unscreened commu-nication and/or sensor to external connectionscables must not be laid closer than 20 cm tohigh voltage cable when cable routing.

POWER CONNECTIONF1255PC must be installed with a disconnection optionon the supply cable. Minimum cable area must be sizedaccording to the fuse rating used. Enclosed cable forincoming supply electricity is connected to terminal blockX1 on the immersion heater board (AA1). All installationsmust be carried out in accordance with current normsand directives.

AA1-X1

NOTEF1255PC is not reconnectable between 1-phase and 3-phase, neither is it reconnectablebetween 3x230V and 3x400V.

F1255PC is not reconnectable between 1-phase and 3-phase.

Connection 1x230V

PE1

0 L1 1PEN

AA1-X1

Connection 3x400V

AA1-X1

PE1

L1 1 L2 L3PE0N

If a separate supply to the compressor and electricheater is wanted, see section "External blocking offunctions" on page 27.

TARIFF CONTROLIf the voltage to the immersion heater and/or the com-pressor disappears during a certain period, there mustalso be blocking via the AUX-input, see "Connectionoptions - Possible selection for AUX inputs" page. 27

CONNECTING EXTERNAL OPERATINGVOLTAGE FOR THE CONTROL SYSTEM

NOTEOnly applies to power connection of 3x400V.

NOTEMark up any junction boxes with warnings forexternal voltage.

If you wish to connect external operating voltage for thecontrol system to F1255PC on the immersion heatercircuit board (AA1) the edge connector at AA1:X2 mustbe moved toAA1:X9 (as illustrated).

Operating voltage (1x230V ~ 50Hz) is connected toAA1:X11 (as illustrated).

1 2

3

4

5

6

ON

L1 1 L2 L3PE

PE

0N

NL

1x230V+N+PE1x230V+N+PE operating voltage

AA1

AA1-X8

AA1-X2

AA1-X9

AA1-X11

CONNECTING SENSORS

AA3-X6

Connect the sensor(s) toterminal X6 on inputboard(AA3) according to theinstructions below.

21Chapter 5 | Electrical connectionsNIBE F1255PC

Outside sensorInstall the outdoor temperature sensor (BT1) in theshade on a wall facing north or north-west, so it is unaf-fected by the morning sun for example.

Connect the sensor to terminal block X6:1 and X6:2 onthe input board (AA3).

If a conduit is used it must be sealed to prevent condens-ation in the sensor capsule.

1

2

3

4

AA3-X6BT1

External F1255PC

Temperature sensor, external flow lineIf temperature sensor, external supply line (BT25) needsto be used, connect it to terminal block X6:5 and X6:6on the input board (AA3).

F1245

4

5

6

7

AA3-X6BT25

F1255PC

Room sensorF1255PC is supplied with a room sensor enclosed(BT50). The room sensor has a number of functions:

1. Shows current room temperature in the display onF1255PC.

2. Option of changing the room temperature in °C.

3. Provides the option of fine-tuning the room temper-ature.

Install the sensor in a neutral position where the settemperature is required. A suitable location is on a freeinner wall in a hall approx. 1.5 m above the floor. It isimportant that the sensor is not obstructed from meas-uring the correct room temperature by being located,for example, in a recess, between shelves, behind acurtain, above or close to a heat source, in a draft froman external door or in direct sunlight. Closed radiatorthermostats can also cause problems.

The heat pump operates without the sensor, but if onewishes to read off the accommodation's indoor temper-ature in F1255PC's display, the sensor must be installed.Connect the room sensor to X6:3 and X6:4 on the inputboard (AA3).

If the sensor is to be used to change the room temper-ature in °C and/or to fine-tune the room temperature,the sensor must be activated in menu 1.9.4.

If the room sensor is used in a room with underfloorheating, it should only have an indicatory function, notcontrol of the room temperature.

F1245RG 05

2

3

4

5

AA3-X6BT50

External F1255PC

CautionChanges of temperature in accommodationtake time. For example, short time periods incombination with underfloor heating will notgive a noticeable difference in room temperat-ure.

Settings

AA1-X7

AA1-X3

AA1-S2

FQ10

ELECTRICAL ADDITION - MAXIMUM OUTPUTNumber of steps, maximum electrical output and supplyon connection for the immersion heater varies depend-ing on model. See tables.

The electric additional heat may be restricted dependingon the selected country.

On delivery the immersion heater is connected for amaximum of 7 kW (switchable to 9 kW at 3x400V).

The immersion heater's output is split into seven steps(four steps if the immersion heater for 3x400V isswitched to maximum 9 kW), according to the tablebelow.

NIBE F1255PCChapter 5 | Electrical connections22

Number of connection stepsMaxF1255PC

94.5 kW1x230V

136.5 kW3x400V

Setting max electrical outputSetting maximum output in the electric additional heatis done in menu 5.1.12.

The table displays the total phase current for the immer-sion heater at start up. If an immersion heater hasalready been started and is not used for its full capacitythe values in the table can be changed because thecontrol initially uses this immersion heater.

3x400V, F1255PC

Max phasecurrentL3(A)

Max phasecurrent L2(A)

Max phasecurrent L1(A)

Max electric-al addition

(kW)

–––0.0––2.20.5–4.3–1.0–4.32.21.5

8.7––2.08.7–2.22.58.74.3–3.08.74.32.23.57.54.37.54.07.54.39.74.5

16.2–7.55.016.2–9.75.516.24.37.56.016.24.39.76.5

1x230V, F1255PC

Max phase current L1(A)Max electrical addition (kW)

–0.02.20.54.31.06.51.58.62.010.82.513.03.015.23.517.34.019.54.5

If the current sensors are connected, the heat pumpmonitors the phase currents and allocates the electricalsteps automatically to the least loaded phase.

EMERGENCY MODEWhen the heat pump is set to emergency mode (SF1is set to ) only the most necessary functions are activ-ated.

• The compressor is off and heating is managed by theimmersion heater.

• Hot water is not produced.

• The load monitor is not connected.

NOTEThe switch (SF1) must not be moved to "" or" " until F1255PC has been filled with water.Components in the product can be damaged.

Power in emergency mode3x400V (maximum electrical output, connectedupon delivery 7 kW) for F1255PC-12 / -16)

654321kW

onoffoffoffoffoff1offoffoffonoffoff2onoffoffonoffoff3offonoffonoffoff4onoffoffonoffon5offonoffonoffon6ononoffonoffon7

3x400V (maximum electrical output, switched to9 kW) for F1255PC -12 / -16)

654321kW

offonoffoffoffoff2offonoffonoffoff4offonoffonoffon6ononononoffon9

3x400V for F1255PC

654321kW

offoffoffoffoffon0.5offoffoffonoffoff1.0offoffoffonoffon1.5offonoffoffoffoff2.0offonoffoffoffon2.5offonoffonoffoff3.0offonoffonoffon3.5onoffoffononoff4.0onoffoffononon4.5ononoffoffonoff5.0ononoffoffonon5.5ononoffononoff6.0ononoffononon6.5

23Chapter 5 | Electrical connectionsNIBE F1255PC

1x230V for F1255PC

654321kW

offoffoffoffoffon0.5offoffoffonoffoff1.0offoffoffonoffon1.5ononoffoffoffoff2.0offonoffoffoffon2.5offonoffonoffoff3.0offonoffonoffon3.5ononoffonoffoff4.0ononoffonoffon4.5

3x400V/1x230V

1 2

3

4

5

6

ON

AA1-S2

The image shows the dip-switch (AA1-S2) in the factorysetting.

Emergency mode thermostat

The supply temperature in emergency mode is set usinga thermostat (FQ10). It can be set to 35 (pre-set, forexample underfloor heating) or 45 °C (for example radi-ators).

LEK

LEK

För markvärme!

För frånluftsvärme!

Optional connectionsLOAD MONITOR

Integrated load monitorF1255PC is equipped with a simple form of integratedload monitor, which limits the power steps for theelectric additional heat by calculating whether futurepower steps can be connected to the relevant phasewithout exceeding the specified main fuse. If the currentwould exceed the specified main fuse, the power stepis not permitted. The size of the property’s main fuseis specified in menu 5.1.12.

Load monitor with current sensorWhen many power-consuming products are connectedin the property at the same time as the electric additionalheat is operating, there is a risk of the property’s mainfuses tripping. F1255PC is equipped with a load monitorwhich, with the aid of a current sensor, controls thepower steps for the electric additional heat by redistrib-uting the power between the different phases or bydisengaging the electric additional heat in event of anoverload in a phase. If the overload remains despite theelectric additional heat being disengaged, the com-pressor winds down. Reconnection occurs when theother current consumption drops.

CautionActivate phase detection in menu 5.1.12 forfull functionality, if current sensors are installed.

Connecting current sensors

A current sensor should be installed on each incomingphase conductor in to the distribution box to measurethe current. The distribution box is an appropriate install-ation point.

Connect the current sensors to a multi-core cable in anenclosure directly adjacent to the electrical distributionunit. The multi-core cable between the enclosure andF1255PC must have a cable area of at least 0.5 mm².

Connect the cable to the input board (AA3) on terminalblock X4:1-4 where X4:1 is the common terminal blockfor the three current sensors.

LPEN 1 L2 L3

AA3-X4 AA3-X4

Electrical distributionunitHeat pump

Incoming electricity

1 2 3 4

-T1 -T2 -T3

NIBE F1255PCChapter 5 | Electrical connections24

CONNECTING EXTERNAL ENERGY METER

NOTEConnection of external energy meter requiresversion 35 or later on input board (AA3) as wellas "display version" 7312 or later.

One or two energy meters (BE6, BE7) are connected toterminal block X22 and/or X23 on input board (AA3).

1

2

3

ProduktNamnExtern energimätare

+5V

F1255PC

AA3-X22/23

External

AA3-X22/23

Activate the energy meter(s) in menu 5.2.4 and then setthe desired value (energy per pulse) in menu 5.3.21.

NIBE UPLINKConnect the network connected cable (straight, Cat.5eUTP) with RJ45-contact (male) to RJ45 contact (female)on the rear of the heat pump.

EXTERNAL CONNECTION OPTIONSF1255PC has software-controlled AUX inputs and out-puts on the input board (AA3), for connecting the extern-al switch function or sensor. This means that when anexternal switch function (the switch must be potential-free) or sensor is connected to one of six special con-nections, this function must be selected for the correctconnection in menu 5.4.

block heating

activate temp lux

not used

not used

not used

alarm output

soft in/outputs 5.4

For certain functions, accessories may be required.

Selectable inputsSelectable inputs on the input board for these functionsare:

AA3-X6:9-10AUX1AA3-X6:11-12AUX2AA3-X6:13-14AUX3AA3-X6:15-16AUX4AA3-X6:17-18AUX5

F1245Externt

9

10

11

12

13

14

15

16

B

A

AA3-X6

External F1255PC

AA3-X6

The example above uses the inputs AUX1 (X6:9-10) and AUX2 (X6:11-12) on the input board (AA3).

Selectable outputA selectable output is AA3-X7.

TIPSome of the following functions can also beactivated and scheduled via menu settings.

POSSIBLE SELECTION FOR AUX INPUTS

Temperature sensorTemperature sensor can be connected to F1255PC.

Available options are:

• external supply line (BT25) (control of temperature tothe heating system)

25Chapter 5 | Electrical connectionsNIBE F1255PC

• cooling/heating (BT74), determines when it is time toswitch between cooling and heating operation.

MonitorAvailable options are:

• alarm from external units. The alarm is connected tothe control, which means that the malfunction ispresented as an information message in the display.Potential-free signal of type NO or NC.

• level (accessory NV10)/, pressure/flow monitor for thebrine (NC).

• pressure switch for climate system (NC).

External activation of functionsAn external switch function can be connected toF1255PC to activate various functions. The function isactivated during the time the switch is closed.

Possible functions that can be activated:

• forced control of brine pump

• hot water comfort mode “temporary lux”

• hot water comfort mode “economy”

• “external adjustment”

When the switch is closed, the temperature changesin °C (if the room sensor is connected and activated).If a room sensor is not connected or not activated,the desired change of “temperature” (heating curveoffset) is set with the number of steps selected. Thevalue is adjustable between -10 and +10. Externaladjustment of climate systems 2 to 8 requires ac-cessories.

– climate system 1 to 8

The value for the change is set in menu 1.9.2, "ex-ternal adjustment".

• activation of one of four fan speeds.

(Can be selected if ventilation accessory is activated.)

The following five options are available:

– 1-4 is normally open (NO)

– 1 is normally closed (NC)

The fan speed is activated during the time the switchis closed. Normal speed is resumed when the switchis opened again.

• +Adjust

Using +Adjust, the installation communicates withthe underfloor heating’s control centre* and adjuststhe heating curve and calculated supply temperatureaccording to the underfloor heating system’s recon-nection.

Activate the climate system you want +Adjust to affectby highlighting the function and pressing the OK but-ton.

*Support for +Adjust required

CautionThis accessory may require a software up-date in your F1255PC. The version can bechecked in the “Service info” menu 3.1.Visit nibeuplink.com and click on the “Soft-ware” tab to download the latest softwareto your installation.

CautionIn systems with both underfloor heating andradiators, NIBE ECS 40/41 should be usedfor optimum operation.

• SG ready

CautionThis function can only be used in mains net-works that support the "SG Ready" standard.

"SG Ready" requires two AUX inputs.

"SG Ready" is a smart form of tariff control, throughwhich your electricity supplier can affect the indoor,hot water and/or pool temperatures (if applicable) orsimply block the additional heat and/or compressor inthe heat pump at certain times of the day (can be se-lected in menu 4.1.5 after the function is activated).Activate the function by connecting potential-freeswitch functions to two inputs selected in menu 5.4(SG Ready A and SG Ready B).

Closed or open switch means one of the following:

– Blocking (A: Closed, B: Open)

"SG Ready" is active. The compressor in the heatpump and additional heat is blocked like the day'stariff blocking.

– Normal mode (A: Open, B: Open)

"SG Ready" is not active. No effect on the system.

– Low price mode (A: Open, B: Closed)

"SG Ready" is active. The system focuses on costssavings and can for example exploit a low tariff fromthe electricity supplier or over-capacity from any ownpower source (effect on the system can be adjustedin the menu 4.1.5).

– Overcapacity mode (A: Closed, B: Closed)

"SG Ready" is active. The system is permitted to runat full capacity at over capacity (very low price) withthe electricity supplier (effect on the system is set-table in menu 4.1.5).

(A = SG Ready A and B = SG Ready B )

NIBE F1255PCChapter 5 | Electrical connections26

External blocking of functionsAn external switch function can be connected toF1255PC for blocking various functions. The switch mustbe potential-free and a closed switch results in blocking.

NOTEBlocking entails a risk of freezing.

Functions that can be blocked:

• heating (blocking of heating demand)

• hot water (hot water production). Any hot water circu-lation (HWC) remains in operation.

• compressor

• internally controlled additional heat

• tariff blocking (additional heat, compressor, heating,cooling and hot water are disconnected)

POSSIBLE SELECTION FOR AUX OUTPUT(POTENTIAL FREE VARIABLE RELAY)It is possible to have an external connection through therelay function via a potential free variable relay (max 2A) on the input circuit board (AA3), terminal block X7.

Optional functions for external connection:

• Indication of buzzer alarm.

• Controlling ground water pump.

• Cooling mode indication.

• Control of circulation pump for hot water circulation.

• External circulation pump (for heating medium).

• External, reversing valve for hot water.

• Holiday indication.

If any of the above is installed to terminal block X7 itmust be selected in menu 5.4, see page 49.

The common alarm is preselected at the factory.

NOTEAn accessory card is required if several func-tions are connected to terminal block X7 at thesame time that the buzzer alarm is activated(see page 60).

AA3-X7

C NO NC

1 2 3

AA3-X7

The picture shows the relay in the alarm position.

When switch (SF1) is in the " " or “ ” position the relayis in the alarm position.

External circulation pump, ground water pump or hotwater circulation pump connected to the buzzer alarmrelay as illustrated below.

NOTEMark up any junction boxes with warnings forexternal voltage.

L

L

N

N

PE

PE

F1X45

Externt

AA3-X7C NO NC

1 2 3

ExternalF1255PC

Circulation pump

AA3-X7

CautionThe relay outputs can have a max load of 2 A(230V ~).

ConnectingaccessoriesInstructions for connecting accessories are in the install-ation instructions provided for the respective accessory.See information at nibe.eu for the list of the accessoriesthat can be used with F1255PC.

ACCESSORIES WITH CIRCUIT BOARD AA5Accessories that contain circuit board AA5 are connectedto the heat pump terminal block AA3-X4: 13-15. Usecable type LiYY, EKKX or similar.

If several accessories are to be connected, connect thefirst accessory card directly to the heat pump terminalblock. Other accessory boards are connected to the firstin series.

Because there can be different connections for accessor-ies with circuit boards AA5, you should always read theinstructions in the manual for the accessory that youare going to install.

27Chapter 5 | Electrical connectionsNIBE F1255PC

1

2

3

4

5

6

7

8

AA5-X4

15

A

B

GND

A

B

GND

A

B

GND

A

B

GND

A

B

GND

14

13

AA3-X4

1

2

3

4

5

6

7

8

AA5-X4

F1255PC

Accessory card 1

Accessory card 2

ON1

23

45

67

8

-X9

-X2

24 20212223 1516171819 1011121314 56789 1

1

N

L

PE

PE

1

2

3

4

5

6

7

8

2

3

4

5

6

7

8

9234

-X8

-X4

-X10

-X1

AA5-X4

ON1

23

45

67

8

-X9

-X2

24 20212223 1516171819 1011121314 56789 1

1

N

L

PE

PE

1

2

3

4

5

6

7

8

2

3

4

5

6

7

8

9234

-X8

-X4

-X10

-X1

AA5-X4

AA3-X4

EB100

ACCESSORIES WITH CIRCUIT BOARD AA9Accessories that contain the circuit board AA9 are con-nected to the heat pump's terminal block X4:9-12 onthe input board AA3. Use cable type LiYY, EKKX orequivalent.

Because there can be different connections for accessor-ies with circuit boards AA9, you should always read theinstructions in the manual for the accessory that youare going to install.

121110987

12V A B GND

12

11

10

9

8

7

12V

A

B

GND

AA3-X4

AA9-X1

F1255PCAccessories

AA3-X4

NIBE F1255PCChapter 5 | Electrical connections28

Preparations1. Check that the switch (SF1) is in position " ".

2. Check for water in the hot water heater and climatesystem.

CautionCheck the miniature circuit-breaker and themotor protection breakers. They may havetripped during transportation.

NOTEDo not start F1255PC if there is a risk that thewater in the system has frozen.

Filling and ventingCautionInsufficient venting can damage internal com-ponents in F1255PC.

FILLING AND VENTING THE CLIMATESYSTEM

Filling1. Open the filling valve (external, not included in the

product). Fill the coil in the hot water heater and therest of the climate system with water.

2. Open the vent valve (QM22).

3. When the water that exits the vent valve (QM22) isnot mixed with air, close the valve. After a while thepressure starts to rise.

4. Close the filling valve when the correct pressure isobtained.

Venting1. Bleed the heat pump via a vent valve (QM22) and

the rest of the climate system via their relevant ventvalves.

2. Keep topping up and venting until all air has beenremoved and the pressure is correct.

NOTEThe pipe from the coil in the container mustbe drained of water before air can be released.This means that the system is not necessarilybled despite the flow of water when the ventvalve (QM22) is opened.

FILLING THE HOT WATER HEATER1. Open a hot water tap in the house.

2. Fill the hot water heater through the cold waterconnection (XL3).

3. When the water that comes out of the hot watertap is no longer mixed with air, the water heater isfull and the tap can be closed.

FILLING AND VENTING THE BRINE SYSTEMWhen filling the brine system, mix the water with anti-freeze in an open container. The mixture should beprotected against freezing down to about -15°C. Thebrine is topped up by connecting a filling pump.

1. Check the brine system for leakage.

2. Connect the filling pump and return line on the brinesystem's filling connection (accessory).

3. If alternative 1 is used (level vessel), close the valveunder the level vessel.

4. Close the reversing valve in the filling connection.

5. Open the valves on the filler connector.

6. Start the filling pump.

7. Fill until liquid enters the return pipe.

8. Close the valves on the filler connector.

9. Open the reversing valve in the filling connection.

10. If alternative 1 (level vessel) is used, open the valveunder the level vessel (CM2).

29Chapter 6 | Commissioning and adjustingNIBE F1255PC

6 Commissioning and adjusting

P

-QZ20

Alt. 1 Alt. 2

Close

XL6

XL7

Start-up andinspectionSTART GUIDE

NOTEThere must be water in the climate systembefore the switch is set to " ".

1. Set switch (SF1) on F1255PC to position "".

2. Follow the instructions in the display’s start guide.If the start guide does not start when you start theF1255PC, start it manually in menu 5.7.

TIPSee page 34 for a more in-depth introductionto the heat pump’s control system (operation,menus etc.).

If the building is cooled when F1255PC starts, thecompressor may not be able to meet the entire demandwithout having to use additional heating.

CommissioningThe first time the installation is started a start guide isstarted. The start guide instructions state what needsto carried out at the first start together with a runthrough of the installation’s basic settings.

The start guide ensures that the start-up is carried outcorrectly and, for this reason, cannot be skipped.

CautionAs long as the start guide is active, no functionin the installation will start automatically.

The start guide will appear at each restart ofthe installation, until it is deselected on the lastpage.

Operation in the start guide

language4.6

If the start guide is left on this page it closesautomatically in

60 min

A.Page

C. Option / setting

B. Name and menu number

A. Page

Here you can see how far you have come in the startguide.

Scroll between the pages of the start guide as follows:

1. Turn the control knob until one of the arrows in thetop left corner (at the page number) has beenmarked.

2. Press the OK button to skip between the pages inthe start guide.

B. Name and menu number

Here, you can see which menu in the control systemthis page of the start guide is based on. The digits inbrackets refer to the menu number in the control sys-tem.

If you want to read more about affected menus eitherconsult the help menu or read the user manual.

C. Option / setting

Make settings for the system here.

POST ADJUSTMENT AND VENTING

Pump adjustment, automatic operationBrine side

To set the correct flow in the brine system, the brinepump must run at the correct speed. F1255PC has abrine pump that is controlled automatically in standardmode. Certain functions and accessories may demandthat it be run manually, in which case the correct speedmust be set.

This automatic control occurs when the compressor isrunning and sets the speed of the brine pump so thatthe optimum temperature difference between the supplyand return lines is attained.

NIBE F1255PCChapter 6 | Commissioning and adjusting30

Heating medium side

To set the correct flow in the heating medium system,the heating medium pump must run at the correctspeed. F1255PC has a heating medium pump that canbe automatically controlled in standard mode. Certainfunctions and accessories may require it to run manuallyand the correct speed must then be set.

This automatic control occurs when the compressor isrunning and sets the speed of the heating mediumpump, for the relevant operating mode, so the optimumtemperature difference between the supply and returnlines is achieved. During heating operation, the set DOT(dimensioned outdoor temperature) and temperaturedifferential in menu 5.1.14 are used. If necessary, themaximum speed of the circulation pump can be limitedin menu 5.1.11.

Pump adjustment, manual operationBrine side

F1255PC has a brine pump that can be automaticallycontrolled. For manual operation: deactivate "auto" inmenu 5.1.9 and then set the speed according to thediagram below.

CautionWhen passive cooling is used, the brine pumpspeed must be set in menu 5.1.9.

Set the pump speed when the system has come intobalance (ideally 5 minutes after compressor start).

Adjust the flow so the temperature difference betweenbrine out (BT11) and brine in (BT10) is between 2 - 5 °C.Check these temperatures in menu 3.1 "service info"and adjust the brine pump’s (GP2) speed until the tem-perature difference is obtained. A large difference indic-ates a low brine flow and a small difference indicates ahigh brine flow.

Available pressure, kPaElectrical output, W

00,0 0,05 0,10 0,15 0,20 0,25 0,30 0,45

10

20

30

40

50

60

Tillgängligt tryck, kPa

Eleffekt, W

Flöde l/s

P100%

P80%

P60%

P40%

Tillgängligt tryck, kPa

Eleffekt, W

1

2

3

4

70

80

0,35 0,40

p

F1255PC 6 kW

Available pressure, kPa

Flow l/s

Electrical input, W

Pumpkapacitet, köldbärarsida för F1155-1255 -6 kW, manuell drift.

Tillgängligt tryck

kPa

Eleffekt

W

00,0 0,1 0,2 0,3 0,4 0,5 0,6

30

20

10

40

50

60

70

80

0

100

90

80

70

60

50

40

30

20

10

Flöde l/s

P100%

P80%

100%

80%

60%40%

P40%

P60%

Heating medium side

F1255PC has a heating medium pump that can beautomatically controlled. For manual operation: deactiv-ate "auto" in menu 5.1.11 and then set the speed accord-ing to the diagrams below.

The flow must have a suitable temperature differencefor the operating case (heating operation: 5 - 10 °C, hotwater generation: 5 - 10 °C, pool heating: approx. 15 °C)between controlling supply temperature sensor and re-turn line sensor. Check these temperatures in menu 3.1“service info” and adjust the heating medium pump(GP1) speed until the temperature difference is attained.A high difference indicates a low heating medium supplyand a low difference indicates a high heating mediumsupply.

Available pressure, kPaElectrical output, W

00,0 0,05 0,10 0,15 0,20 0,25 0,30 0,45

10

20

30

40

50

60

Tillgängligt tryck, kPa

Eleffekt, W

Flöde l/s

P100%

P80%

P60%

P40%

Tillgängligt tryck, kPa

Eleffekt, W

1

2

3

4

70

80

0,35 0,40

p

F1255PC 6 kW

Available pressure, kPa

Flow l/s

Electrical input, W

Pumpkapacitet, värmebärarsida för F1155-1255 -6 kW, manuell drift.

Tillgängligt tryck

kPa

Eleffekt

W

00,00 0,05 0,10 0,15 0,20 0,25 0,30 0,450,400,35 0,50

30

10

20

40

50

60

70

80

90

0

70

60

50

40

30

20

10

Flöde l/s

P100%

P80%

100%

80%

60%

40%P40%

P60%

Readjusting, venting, heat medium sideAir is initially released from the hot water and ventingmay be necessary. If gurgling sounds can be heard fromthe heat pump or climate system, the entire systemrequires additional venting. Check the pressure in thepressure expansion vessel (CM1) with the pressuregauge (BP5). If the pressure drops, the system shouldbe replenished.

31Chapter 6 | Commissioning and adjustingNIBE F1255PC

Readjusting, venting, collector sideLevel vessel

2/3

LEK

LEK

LEK

2/3

LEK

Gamla bilder, med säkerhetsventil på nivåkärlet

1/3 1/3

Check the fluid level in the level vessel(CM2). If the fluid level has dropped, topup the system.

1. Close the valve under the vessel.

2. Disconnect the connection on top ofthe vessel.

3. Fill with brine until approx 2/3 of thevessel is full.

4. Reconnect the connector at the top ofthe vessel.

5. Open the valve under the vessel.

If the pressure in the system needs to be raised, this isdone by closing the valve on the outgoing main linewhen the brine pump (GP2) is in operation and the levelvessel (CM2) is open, so that liquid is drawn down fromthe vessel.

Expansion vessel

LEK

If a pressure expansion vessel (CM3) isused instead of a level vessel, the pressurelevel is checked with the pressure gauge(BP6). If the pressure drops, the systemshould be replenished.

Setting thecooling/heating curveIn the menus Curve, heating and Curve, cooling , youcan see the heating and cooling curves for your house.The purpose of the curves is to give an even indoortemperature, regardless of the outdoor temperature,and thereby energy-efficient operation. It is from thesecurves that F1255PC determines the temperature ofthe water to the climate system (the supply temperat-ure) and thus the indoor temperature.

CURVE COEFFICIENTThe slopes of the heating /cooling curves indicate howmany degrees the supply temperature is to be in-creased/reduced when the outdoor temperaturedrops/increases. A steeper slope means a higher supplytemperature for heating or a lower supply temperaturefor cooling at a certain outdoor temperature.

200 10 0 -10 -20 -30 -40

30

40

50

60

70

80

Framledningstempereratur

(°C)

Utetemperatur

(°C)

Steeper curve slope

Supply temperature

Outdoor temperature

The optimum curve slope depends on the climate con-ditions in your location, whether the house has radiators,fan coils or underfloor heating and how well insulatedthe house is.

The heating/cooling curves are set when the heating/cool-ing system is installed, but may need adjusting later.Thereafter, the curves should not need further adjust-ment.

CURVE OFFSETAn offset of the curve means that the supply temperat-ure changes by the same amount for all the outdoortemperatures, e.g. a curve offset of +2 steps increasesthe supply temperature by 5 °C at all outdoor temperat-ures. A corresponding change to the cooling curve res-ults in a lowering of the supply temperature.

200 10 0 -10 -20 -30 -40

30

40

50

60

70

80

Framledningstempereratur

(°C)

Utetemperatur

(°C)

Offset heating curve

Supply temperature

Outdoor temperature

SUPPLY TEMPERATURE – MAXIMUM ANDMINIMUM VALUESBecause the supply temperature cannot be calculatedhigher than the set maximum value or lower than theset minimum value, the curves flatten out at thesetemperatures.

NIBE F1255PCChapter 6 | Commissioning and adjusting32

200 10 0 -10 -20 -30 -40

30

40

50

60

70

80

Framledningstempereratur

(°C)

Utetemperatur

(°C)

Maximum value

Supply temperature

Outdoor temperature

Minimum value

CautionWith underfloor heating systems, the maxim-um supply temperature is normally setbetween 35 and 45 °C.

Check the max floor temperature with yourfloor supplier.

CautionMust be restricted with underfloor cooling min.flow line temp. to prevent condensation.

ADJUSTMENT OF CURVE

heating curve1.9.1.1

system

outdoor temp. °C

flow temperature °C

Min supply temperatureMax supply temperature

Curve offsetCurve coefficient

Climate system

1. Select the climate system (if more than one) forwhich the curve is to be changed.

2. Select curve slope and curve offset.

CautionIf you need to adjust "min. flow line temp."and/or "max flow line temperature", you do thisin other menus.

Settings for "min. flow line temp.” in menu1.9.3.

Settings for "max flow line temperature” inmenu 5.1.2.

CautionCurve 0 means that own curve is used.

Settings for own curve are made in menu1.9.7.

TO READ OFF A HEATING CURVE1. Turn the control knob so that the ring on the shaft

with the outdoor temperature is marked.

2. Press the OK button.

3. Follow the grey line up to the curve and out to theleft to read off the value for the supply temperatureat the selected outdoor temperature.

4. You can now select to take read outs for differentoutdoor temperatures by turning the control knobto the right or left and read off the correspondingflow temperature.

5. Press the OK or Back button to exit read off mode.

33Chapter 6 | Commissioning and adjustingNIBE F1255PC

Display unitA

B

C

D

E

F

Display

Status lamp

OK button

Back button

Control knob

Switch

INDOOR CLIMATE

HEAT PUMP INFO

HOTWATER

F1255PCG USB port

DISPLAYInstructions, settings and operational informationare shown on the display. You can easily navigatebetween the different menus and options to setthe comfort or obtain the information you require.

A

STATUS LAMPThe status lamp indicates the status of the heatpump. It:

• lights green during normal operation.

• lights yellow in emergency mode.

• lights red in the event of a deployed alarm.

B

OK BUTTONThe OK button is used to:

• confirm selections of sub menus/options/setvalues/page in the start guide.

C

BACK BUTTONThe back button is used to:

• go back to the previous menu.

• change a setting that has not been confirmed.

D

CONTROL KNOBThe control knob can be turned to the right orleft. You can:

• scroll in menus and between options.

• increase and decrease the values.

• change page in multiple page instructions (forexample help text and service info).

E

SWITCH (SF1)The switch assumes three positions:

• On ()

• Standby ( )

• Emergency mode ( )

Emergency mode must only be used in the eventof a fault on the heat pump. In this mode, thecompressor switches off and the immersionheater engages. The heat pump display is not il-luminated and the status lamp illuminates yellow.

F

USB PORTThe USB port is hidden beneath the plastic badgewith the product name on it.

The USB port is used to update the software.

Visit nibeuplink.com and click the "Software" tabto download the latest software for your installa-tion.

G

NIBE F1255PCChapter 7 | Control - Introduction34

7 Control - Introduction

Menu systemWhen the door to the heat pump is opened, the menusystem’s four main menus are shown in the display aswell as certain basic information.

INDOOR CLIMATE

HEAT PUMP INFO

HOTWATER

SERVICE

Indoor temperature - (if room sensors are installed)

Hot water temp.

Temporary lux (if activated)

Outdoortemperature

Estimated amount of hot water

Information aboutoperation

MENU 1 - INDOOR CLIMATESetting and scheduling the indoor climate. See informa-tion in the help menu or user manual.

MENU 2 - HOT WATERSetting and scheduling hot water production. See inform-ation in the help menu or user manual.

MENU 3 - INFODisplay of temperature and other operating informationand access to the alarm log. See information in the helpmenu or user manual.

MENU 4 - HEAT PUMPSetting time, date, language, display, operating modeetc. See information in the help menu or user manual.

MENU 5 - SERVICEAdvanced settings. These settings are only intended forinstallers or service engineers. The menu is visible whenthe Back button is pressed for 7 seconds, when you arein the start menu. See page 40.

SYMBOLS IN THE DISPLAYThe following symbols can appear in the display duringoperation.

DescriptionSymbol

This symbol appears by the information signif there is information in menu 3.1 that youshould note.These two symbols indicate whether thecompressor or addition is blocked inF1255PC.

These can, for example, be blocked depend-ing on which operating mode is selected inmenu 4.2, if blocking is scheduled in menu4.9.5 or if an alarm has occurred that blocksone of them.

Blocking the compressor.

Blocking additional heat.

This symbol appears if periodic increase orlux mode for the hot water is activated.

This symbol indicates whether "holidaysetting" is active in 4.7.

This symbol indicates whether F1255PChas contact with NIBE Uplink.

This symbol indicates the actual speed ofthe fan if the speed has changed from thenormal setting.

Accessory needed.This symbol indicates whether pool heatingis active.

Accessory needed.This symbol indicates whether cooling isactive.

Accessory needed.

35Chapter 7 | Control - IntroductionNIBE F1255PC

INDOOR CLIMATE

HEAT PUMP INFO

HOTWATER

temperature

INDOOR CLIMATE 1

ventilation

scheduling

advanced

off

normal

Marked main menu

Menu number – marked sub menu Name and menu number – main menu

Symbol – mainmenu

Status information – sub menusName – sub menusSymbols – sub menus

OPERATIONTo move the cursor, turn the control knobto the left or the right. The marked positionis white and/or has a turned up tab.

SELECTING MENUTo advance in the menu system select a main menu bymarking it and then pressing the OK button. A newwindow then opens with sub menus.

Select one of the sub menus by marking it and thenpressing the OK button.

SELECTING OPTIONS

economy

comfort mode 2.2

normal

luxury

smart control

In an options menu the current selected option isindicated by a green tick.

To select another option:

1. Mark the applicable option. One of the optionsis pre-selected (white).

2. Press the OK button to confirm the selectedoption. The selected option has a green tick.

SETTING A VALUE

time & date4.4time

day

year

month

24 h

12 h

date

Values to be changed

To set a value:

1. Mark the value you want to set using thecontrol knob.

2. Press the OK button. The background of thevalue becomes green, which means that youhave accessed the setting mode.

3. Turn the control knob to the right to increasethe value and to the left to reduce the value.

4. Press the OK button to confirm the value youhave set. To change and return to the originalvalue, press the Back button.

NIBE F1255PCChapter 7 | Control - Introduction36

USE THE VIRTUAL KEYBOARD

Different keyboards

In some menus where text may require entering, a vir-tual keyboard is available.

Depending on the menu, you can gain access to differ-ent character sets which you can select using the controlknob. To change character table, press the Back button.If a menu only has one character set the keyboard isdisplayed directly.

When you have finished writing, mark "OK” and pressthe OK button.

SCROLL THROUGH THE WINDOWSA menu can consist of several windows. Turn the controlknob to scroll between the windows.

Current menuwindow

Number of windowsin the menu

Scroll through the windows in the start guide

language4.6

If the start guide is left on this page it closesautomatically in

60 min

Arrows to scroll through window in start guide

1. Turn the control knob until one of the arrows in thetop left corner (at the page number) has beenmarked.

2. Press the OK button to skip between the steps inthe start guide.

HELP MENUIn many menus there is a symbol that indicatesthat extra help is available.

To access the help text:

1. Use the control knob to select the help symbol.

2. Press the OK button.

The help text often consists of several windows thatyou can scroll between using the control knob.

37Chapter 7 | Control - IntroductionNIBE F1255PC

Menu 1 - INDOOR CLIMATE1.1.1 - heating1.1 - temperature1 - INDOOR CLIMATE1.1.2 - cooling

1.2 - ventilation *

1.3.1 - heating1.3 - scheduling1.3.2 - cooling1.3.3 - ventilation *

1.9.1.1 heating curve1.9.1 - curve1.9 - advanced1.9.1.2 - cooling curve

1.9.2 - external adjustment

1.9.3.1 - heating1.9.3 - min. flow line temp.1.9.3.2 - cooling

1.9.4 - room sensor settings1.9.5 - cooling settings1.9.6 - fan return time *

1.9.7.1 - heating1.9.7 - own curve1.9.7.2 - cooling

1.9.8 - point offset1.9.9 – night cooling1.9.11 - +Adjust1.9.12 - FLM cooling*

Menu 2 - HOT WATER2.1 - temporary lux2 - HOT WATER2.2 - comfort mode2.3 - scheduling

2.9.1 - periodic increase2.9 - advanced2.9.2 - hot water recirc.

NIBE F1255PCChapter 8 | Control - Menus38

8 Control - Menus

Menu 3 - INFO3.1 - service info3 - INFO3.2 - compressor info3.3 - add. heat info3.4 - alarm log3.5 - indoor temp. log

* Accessories are needed.

Menu 4 - HEAT PUMP4.1.1 - pool *4.1 - plus functions4 - HEAT PUMP

4.1.3.1 - NIBE Uplink4.1.3 - internet4.1.3.8 - tcp/ip settings4.1.3.9 - proxy settings

4.1.4 - sms *4.1.5 - SG Ready4.1.6 - smart price adap-tion™4.1.7 - smart home

4.1.8.1 - settings4.1.8 - smart energysource™

4.1.8.2 - set. price4.1.8.3 - CO2 impact4.1.8.4 - tariff periods, elec-tricity4.1.8.5 - tariff periods, fixedprice4.1.8.6 - tariff per, ext. shuntadd4.1.8.7 - tariff per, ext. stepadd4.1.8.8 - tariff periods,OPT10

Menu 4.1.10 – solar electri-city *

4.2 - op. mode4.3 - my icons4.4 - time & date4.6 - language4.7 - holiday setting

4.9.1 - op. prioritisation4.9 - advanced4.9.2 - auto mode setting4.9.3 - degree minute set-ting4.9.4 - factory setting user4.9.5 - schedule blocking

* Accessory needed.

39Chapter 8 | Control - MenusNIBE F1255PC

Menu 5 - SERVICEOVERVIEW

5.1.1 - hot water settings5.1 - operating settings5 - SERVICE5.1.2 - max flow line temperature5.1.3 - max diff flow line temp.5.1.4 - alarm actions5.1.5 - fan sp. exhaust air *5.1.7 - br pmp al set.5.1.8 - operating mode brine pump5.1.9 - brine pump speed5.1.10 - op. mod heat med pump5.1.11 - pump speed heating medium5.1.12 - internal electrical addition5.1.14 - flow set. climate system5.1.22 - heat pump testing5.1.24 - blockFreq

5.2.4 - accessories5.2 - system settings

5.3.1 - FLM *5.3 - accessory settings5.3.2 - shunt controlled add. heat *5.3.3 - extra climate system *5.3.4 - solar heating *5.3.6 - step controlled add. heat5.3.8 - hot water comfort *5.3.11 - modbus *5.3.12 - exhaust/supply air module *5.3.15 - GBM communications mod-ule *5.3.16 - humidity sensor *5.3.21 - flow sensor / energy meter*

5.4 - soft in/outputs5.5 - factory setting service5.6 - forced control5.7 - start guide5.8 - quick start5.9 - floor drying function5.10 - change log

* Accessory needed.

Go to the main menu and hold the Back button in for 7seconds to access the Service menu.

Sub-menusMenu SERVICE has orange text and is intended for theadvanced user. This menu has several sub-menus.Status information for the relevant menu can be foundon the display to the right of the menus.

operating settings Operating settings for the heatpump.

system settings System settings for the heat pump,activating accessories etc.

accessory settings Operational settings for differentaccessories.

soft in/outputs Setting software controlled in and out-puts on the input circuit board (AA3).

factory setting service Total reset of all settings (includ-ing settings available to the user ) to default values.

forced control Forced control of the different compon-ents in the heat pump.

start guide Manual start of the start guide which is runthe first time the heat pump is started.

quick start Quick starting the compressor.

NOTEIncorrect settings in the service menus candamage the heat pump.

MENU 5.1 - OPERATING SETTINGSOperating settings can be made for the heat pump inthe sub menus.

NIBE F1255PCChapter 8 | Control - Menus40

MENU 5.1.1 - HOT WATER SETTINGS

start temp. economy / normal / luxSetting range: 5 – 70 °C

Factory setting (°C):

luxurynormaleco-nomy

474440Enamel474440Stainless

stop temp. economy / normal / luxSetting range: 5 – 70 °C

Factory setting (°C):

luxurynormaleco-nomy

514844Enamel514844Stainless

stop temp. per. increaseSetting range: 55 – 70 °C

Factory setting: 55 °C

high powerSetting range: on/off

Factory setting: off

Here you set the start and stop temperature of the hotwater for the different comfort options in menu 2.2 aswell as the stop temperature for periodic increase inmenu 2.9.1.

For a higher charge output click the high output selec-tion.

With “high power” activated, the hot water is chargedwith greater power than standard mode and thereforehas a faster recharging time.

MENU 5.1.2 - MAX FLOW LINETEMPERATURE

climate systemSetting range: 20-80 °C

Default value: 60 °C

Set the maximum supply temperature for the climatesystem here. If the installation has more than one cli-mate system, individual maximum supply temperaturescan be set for each system. Climate systems 2 - 8 can-not be set to a higher max supply temperature than cli-mate system 1.

CautionFor underfloor heating systems, max flow linetemperature should normally be set to between35 and 45°C.

Check the max floor temperature with yourfloor supplier.

MENU 5.1.3 - MAX DIFF FLOW LINE TEMP.

max diff compressorSetting range: 1 – 25 °C

Default value: 10 °C

max diff additionSetting range: 1 – 24 °C

Default value: 3 °C

Here you set the maximum permitted differencebetween the calculated and actual supply temperaturein the event of compressor or additional heat mode re-spectively. Max diff. additional heat can never exceedmax diff. compressor

max diff compressorIf the current supply temperature exceeds the calculatedsupply by set value, the degree minute value is set to+2. The compressor in the heat pump stops if there isonly a heating demand.

max diff additionIf “addition” is selected and activated in menu 4.2 andthe current supply temperature exceeds the calculatedtemperature by the set value, the additional heat isforced to stop.

MENU 5.1.4 - ALARM ACTIONSSelect how you want the heat pump to alert you thatthere is an alarm in the display here.

The different alternatives are that the heat pump stopsproducing hot water (default setting) and/or reduces theroom temperature.

CautionIf no alarm action is selected, it can result inhigher energy consumption in the event of analarm.

MENU 5.1.5 - FAN SP. EXHAUST AIR(ACCESSORY IS REQUIRED)

normal and speed 1-4Setting range: 0 – 100 %

Set the speed for the five different selectable speedsfor the fan here.

41Chapter 8 | Control - MenusNIBE F1255PC

CautionAn incorrectly set ventilation flow can damagethe house and may also increase energy con-sumption.

MENU 5.1.7 - BR PMP AL SET.

min. brine outSetting range: -12 – 15 °C

Default value: -8 °C

min. brine outSet the temperature at which the heat pump is to activ-ate the alarm for low temperature in outgoing brine.

If "automatic reset" is selected, the alarm resets whenthe temperature has increased by 1 °C below the setvalue.

The compressor winds down when the brine temperat-ure reaches the set minimum value for brine temperat-ure. Compressor control attempts to maintain the brineat a temperature 2 ° greater than the set value for brineout.

MENU 5.1.8 - OPERATING MODE BRINEPUMP

op. modeSetting range: intermittent, continuous, 10 dayscontinuous

Default value: intermittent

Set the operating mode of the brine pump here.

intermittent: The brine pump starts approx. 20 secondsbefore and stops approx. 20 seconds after the com-pressor.

continuous: Continuous operation.

10 days continuous: Continuous operation for 10 days.The pump then shifts to intermittent operation.

TIPYou can use “10 days continuous" at start-upto obtain continuous circulation during a start-up time in order to make it easier to bleed thesystem.

MENU 5.1.9 - BRINE PUMP SPEED

op. modeSetting range: auto / manual / fixed delta

Default value: auto

delta TSetting range: 2 - 10 °C

Factory setting: 4 °C

speed in wait modeSetting range: 1 - 100 %

Factory setting: 70 %

Speed extern. contr. (AUX)Setting range: 1 - 100 %

Factory setting: 100 %

manualSetting range: 1 - 100 %

Factory setting: 100 %

speed passive coolingSetting range: 1 - 100 %

Factory setting: 75 %

Delta in the case of passive coolingSetting range: 1 - 15 °C

Factory setting: 4 °C

speed in wait mode coolingSetting range: 1 - 100 %

Factory setting: 30 %

temperature difference, active coolingSetting range: 2 - 10 °C

Factory setting: 5 °C

Set the speed of the brine pump here. Select "auto" ifthe speed of the brine pump is to be regulated automat-ically (factory setting) for optimal operation.

For manual operation of the brine pump, deactivate"auto" and set the value to between 1 and 100 %.

For operation of brine pump with "fixed delta", select"fixed delta" under "op. mode" and set the value between2 and 10 °C.

The brine pump speed during passive cooling operation(the brine pump then runs in manual operation) can alsobe set here.

If the continuous operating mode (see "Menu 5.1.8 -operating mode brine pump", page 42) has been selec-ted one can also choose waiting mode. The circulationpump continues to run while the compressor stops.

NIBE F1255PCChapter 8 | Control - Menus42

MENU 5.1.10 - OP. MOD HEAT MED PUMP

op. modeSetting range: auto, intermittent

Default value: auto

Set the operating mode of the heating medium pumphere.

auto: The heating medium pump runs according to thecurrent operating mode for F1255PC.

intermittent: The heating medium pump starts approx.20 seconds before, and stops at the same time as, thecompressor.

MENU 5.1.11 - PUMP SPEED HEATINGMEDIUM

Operating statusSetting range: auto / manual

Default value: auto

Manual setting, hot waterSetting range: 1 - 100 %

Factory setting: 70 %

Manual setting, heatingSetting range: 1 - 100 %

Default values: 70 %

Manual setting, poolSetting range: 1 - 100 %

Default values: 70 %

speed in wait modeSetting range: 1 - 100 %

Default values: 30 %

min. allowed speedSetting range: 1 - 50%

Default values: 1 %

max. allowed speedSetting range: 50 - 100 %

Default values: 100 %

speed passive coolingSetting range: 1 - 100 %

Default values: 70 %

Set the speed at which the heating medium pump is tooperate in the present operating mode. Select "auto" ifthe speed of the heating medium pump is to be regu-lated automatically (factory setting) for optimal operation.

If "auto" is activated for heating operation you can alsomake the setting "max. allowed speed" which restrictsthe heating medium pump and does not allow it to runat a higher speed than the set value.

For manual operation of the heating medium pump,deactivate "auto" for the current operating mode and setthe value to between 0 and 100% (the previously setvalue for "max. allowed speed" no longer applies).

"heating" means heating operating mode for the heatingmedium pump.

"speed in wait mode" means heating or cooling operatingmode for the heating medium pump, but when the heatpump requires neither compressor operation nor electricadditional heat and slows down.

"hot water" means hot water operating mode for theheating medium pump.

"pool" (accessory required) means pool heating operatingmode for the heating medium pump.

"cooling" means cooling operating mode for the heatingmedium pump.

The heat pump speed during active and passive coolingoperation respectively (the brine pump then runs inmanual operation) can also be set here.

MENU 5.1.12 - INTERNAL ELECTRICALADDITION

fuse sizeSetting range: 1 - 400 A

Default values: 25 A

transformation ratioSetting range: 300 - 3000

Factory setting: 300

Here you set the max. electrical output of the internalelectrical addition in F1255PC and the fuse size for theinstallation.

Here you can also check which current sensor is in-stalled on which incoming phase to the property (thisrequires current sensors to be installed, see page 24).Check by marking "detect phase order" and pressing theOK button.

The results of these checks appear just below the menuselection "detect phase order".

43Chapter 8 | Control - MenusNIBE F1255PC

MENU 5.1.14 - FLOW SET. CLIMATE SYSTEM

presettingsSetting range: radiator, floor heat., rad. + floor heat.,DOT °C

Default value: radiator

Setting range DOT: -40.0 – 20.0 °C

Factory setting DOT: -18.0 °C

own settingSetting range dT at DOT: 0.0 – 25.0

Factory setting dT at DOT: 10.0

Setting range DOT: -40.0 – 20.0 °C

Factory setting DOT: -18.0 °C

The type of heating distribution system the heatingmedium pump (GP1) works towards is set here.

dT at DOT is the difference in degrees between flowand return temperatures at dimensioned outdoor tem-perature.

MENU 5.1.22 - HEAT PUMP TESTING

NOTEThis menu is intended for testing F1255PCaccording to different standards.

Use of this menu for other reasons may resultin your installation not functioning as intended.

This menu contains several sub-menus, one for eachstandard.

MENU 5.1.24 - BLOCKFREQ

blockFreq 1Selectable setting range in the display:

start: 17 – 115 Hz

stop: 22 – 120 Hz

Maximum setting range: 50 Hz.

blockFreq 2Selectable setting range in the display:

start: 17 – 115 Hz

stop: 22 – 120 Hz

Maximum setting range: 50 Hz.

Here you can set a frequency range where the com-pressor is blocked. The parameters for the setting rangediffer depending on which product is controlled by thesetting.

NOTEA large blocked frequency range can cause thecompressor to run jerkily.

MENU 5.2 - SYSTEM SETTINGSMake different system settings for the heat pump here,e.g. which accessories are installed.

There are two ways of activating connected accessories.You can either highlight the alternative in the list or usethe automatic function "search installed acc.".

search installed acc.Mark "search installed acc." and press the OK button toautomatically find connected accessories for F1255PC.

CautionCertain accessories are not found automaticallybut must be ticked off by hand, see menu 5.4.

NOTEOnly mark the option for ground water pumpif the accessory AXC 40 is to be used to controlthe circulation pump.

Make different system settings for the heat pump here,e.g. which accessories are installed.

MENU 5.2.4 - ACCESSORIESInform the heat pump which accessories are installedhere.

There are two ways of activating connected accessories.You can either mark the alternative in the list or use theautomatic function "search installed acc.".

search installed acc.Mark “search installed acc." and press the OK button toautomatically find connected accessories for F1255PC.

CautionCertain accessories are not found with thesearch function, but must be selected insteadin menu 5.4.

NOTEOnly mark the option for ground water pumpif the accessory AXC 40 is to be used to controlthe circulation pump.

MENU 5.3 - ACCESSORY SETTINGSThe operating settings for accessories that are installedand activated are made in the sub-menus for this.

NIBE F1255PCChapter 8 | Control - Menus44

MENU 5.3.1 - FLM

continuous pump op.Setting range: on/off

Factory setting: off

pump speedSetting range: 1 – 100%

Factory setting: 100%

time between defrostsSetting range: 1 – 30 h

Default value: 10 h

months btwn filter alarmsSetting range: 1 – 12

Default value: 3

activate coolingSetting range: on/off

Factory setting: off

continuous pump op.: Select for continuous operationof the circulation pump in the exhaust air module.

pump speed: Set the desired speed for the circulationpump in the exhaust air module.

time between defrosts: Here, you can set the minimumtime that must pass between defrosts of the heat ex-changer in the exhaust air module.

When the exhaust air module is in operation the heatexchanger is cooled so that ice builds up on it. Whentoo much ice builds up the heat transfer capacity of theheat exchanger is reduced and defrosting is required.Defrosting warms up the heat exchanger so that the icemelts and runs off via the condensation hose.

months btwn filter alarms: Here, you can set how manymonths should pass before the heat pump notifies thatit is time to clean the filter in the exhaust air module.

Clean the exhaust air module's air filter regularly, howoften depends on the amount of dust in the ventilationair.

activate cooling: Here, you can activate cooling via theexhaust air module. When the function has been activ-ated, the cooling settings are displayed in the menusystem.

TIPSee the accessory installation instructions forfunction description.

MENU 5.3.2 - SHUNT CONTROLLED ADD.HEAT

prioritised additional heatSetting range: on/off

Factory setting: off

start diff additional heatSetting range: 0 – 2000 DM

Default values: 400 DM

minimum running timeSetting range: 0 – 48 h

Default value: 12 h

min temp.Setting range: 5 – 90 °C

Default value: 55 °C

mixing valve amplifierSetting range: 0.1 –10.0

Default value: 1.0

mixing valve step delaySetting range: 10 – 300 s

Default values: 30 s

Set when the addition is to start, the minimum run timeand the minimum temperature for external addition withshunt here. External addition with shunt is for examplea wood/oil/gas/pellet boiler.

You can set shunt valve amplification and shunt valvewaiting time.

Selecting "prioritised additional heat" uses the heat fromthe external additional heat instead of the heat pump.The shunt valve is regulated as long as heat is available,otherwise the shunt valve is closed.

TIPSee the accessory installation instructions forfunction description.

MENU 5.3.3 - EXTRA CLIMATE SYSTEM

use in heating modeSetting range: on/off

Factory setting: on

use in cooling modeSetting range: on/off

Factory setting: off

45Chapter 8 | Control - MenusNIBE F1255PC

mixing valve amplifierSetting range: 0.1 – 10.0

Default value: 1.0

mixing valve step delaySetting range: 10 – 300 s

Default values: 30 s

Contr. pump GP10Setting range: on/off

Factory setting: off

Here, you select which climate system (2 - 8) you wishto set.

use in heating mode: If the heat pump is connected toa climate system(s) for cooling, any condensation cantake place in this/these. Check that "use in heatingmode" has been selected for the climate system(s) thatis/are not adapted for cooling. This setting means thatthe sub-shunt for the extra climate system closes whencooling operation is activated.

use in cooling mode: Select "use in cooling mode" forclimate systems that are adapted to handle cooling. For2-pipe cooling you can select both "use in cooling mode"and "use in heating mode", while for 4-pipe cooling youcan only select one option.

CautionThis setting option only appears if the heatpump is activated for cooling operation in menu5.2.4..

mixing valve amplifier, mixing valve step delay: Here,you set the shunt amplification and shunt waiting timefor the various extra climate systems that are installed.

Contr. pump GP10: Here, you can set the speed of thecirculation pump manually.

See the accessory installation instructions for functiondescription.

MENU 5.3.4 - SOLAR HEATING

start delta-TSetting range: 1 – 40 °C

Default value: 8 °C

stop delta-TSetting range: 0 – 40 °C

Default value: 4 °C

max. tank temperatureSetting range: 5 – 110 °C

Default value: 95 °C

max. solar collector temp.Setting range: 80 – 200 °C

Default value: 125 °C

anti-freeze temperatureSetting range: -20 – +20 °C

Default value: 2 °C

start solar collector coolingSetting range: 80 – 200 °C

Default value: 110 °C

passive recharging - activation temperatureSetting range: 50 – 125 °C

Factory setting: 110 °C

passive recharging - deactivationtemperatureSetting range: 30 – 90 °C

Factory setting: 50 °C

active recharging - activating dTSetting range: 8 – 60 °C

Factory setting: 40 °C

active recharging - deactivating dTSetting range: 4 – 50 °C

Factory setting: 20 °C

NIBE F1255PCChapter 8 | Control - Menus46

start delta-T, stop delta-T: Here, you can set the temper-ature difference between solar panel and solar tank atwhich the circulation pump will start and stop.

max. tank temperature, max. solar collector temp.: Here,you can set the maximum temperatures in the tank andsolar panel respectively at which the circulation pumpwill stop. This is to protect against excess temperaturesin the solar tank.

If the unit has an anti-freeze function, solar panel coolingand/or passive/active recharging you can activate themhere. When the function has been activated, you canmake settings for them. "solar panel cooling", "passiverecharging" and "active recharging" cannot be combined,only one function can be activated.

freeze protectionanti-freeze temperature: Here, you can set the temper-ature in the solar panel at which the circulation pump isto start to prevent freezing.

solar panel coolingstart solar collector cooling: If the temperature in thesolar panel is higher than this setting, at the same timeas the temperature in the solar tank is higher than theset maximum temperature, the external function forcooling is activated.

passive rechargingactivation temperature: If the temperature in the solarpanel is higher than this setting, the function is activated.However, the function is blocked for an hour if thetemperature of the brine entering the heat pump (BT10)is higher than the set value for "max brine in" in menu5.1.7.

deactivation temperature: If the temperature in the solarpanel is lower than this setting, the function is deactiv-ated.

active rechargingactivating dT: If the difference between the temperaturein the solar panel (BT53) and the temperature of thebrine entering the heat pump (BT10) is greater than thissetting, the function is activated. However, the functionis blocked for an hour if the temperature of the brineentering the heat pump (BT10) is higher than the setvalue for "max brine in" in menu 5.1.7.

deactivating dT: If the difference between the temper-ature in the solar panel (BT53) and the temperature ofthe brine entering the heat pump (BT10) is lower thanthis setting, the function is deactivated.

See the accessory installation instructions for functiondescription.

MENU 5.3.6 - STEP CONTROLLED ADD. HEAT

start diff additional heatSetting range: 0 – 2000 DM

Default values: 400 DM

diff. between additional stepsSetting range: 0 – 1000 DM

Default values: 100 DM

max stepSetting range(binary stepping deactivated): 0 – 3

Setting range(binary stepping activated): 0 – 7

Default value: 3

binary steppingSetting range: on/off

Factory setting: off

Make settings for step controlled addition here. Stepcontrolled addition is for example an external electricboiler.

It is possible, for example, to select when the additionalheat is to start, to set the maximum number of permit-ted steps and whether binary stepping is to be used.

When binary stepping is deactivated (off), the settingsrefer to linear stepping.

See the accessory installation instructions for functiondescription.

MENU 5.3.8 - HOT WATER COMFORT

activating the mixing valveSetting range: on/off

Factory setting: off

outgoing hot waterSetting range: 40 - 65 °C

Default value: 55 °C

mixing valve amplifierSetting range: 0.1 – 10.0

Default value: 1.0

mixing valve step delaySetting range: 10 – 300 s

Default values: 30 s

Make settings for the hot water comfort here.

See the accessory installation instructions for functiondescription.

47Chapter 8 | Control - MenusNIBE F1255PC

activating the mixing valve: Activated if mixer valve isinstalled and it is to be controlled from F1255PC. Whenthe option is active, you can set the outgoing hot watertemperature, shunt amplification and shunt waiting timefor the mixer valve.

outgoing hot water: Here, you can set the temperatureat which the mixer valve is to restrict hot water fromthe water heater.

MENU 5.3.11 - MODBUS

addressFactory setting: address 1

word swapFactory setting: not activated

As from Modbus 40 version 10, the address can be setbetween 1 - 247. Earlier versions have a fixed address(address 1).

Here, you can select if you want to have "word swap"instead of the preset standard "big endian".

See the accessory installation instructions for functiondescription.

MENY 5.3.12 - EXHAUST/SUPPLY AIRMODULE

months btwn filter alarms

Setting range: 1 – 24

Default value: 3

lowest extract air temp.

Setting range: 0 – 10 °C

Default value: 5 °C

bypass at excess temperature

Setting range: 2 – 10 °C

Default value: 4 °C

bypass during heating

Setting range: on/off

Factory setting: off

cut-out value, exh. air temp.

Setting range: 5 – 30 °C

Default value: 25 °C

months btwn filter alarms: Set how often the filter alarmis to be displayed.

lowest extract air temp.: Set the minimum extract airtemperature to prevent the heat exchanger freezing.

bypass at excess temperature: If a room sensor is in-stalled, set the excess temperature at which the bypassdamper is to open here.

TIPSee the installation instructions for ERS andHTS for a function description.

MENU 5.3.15 - GBM COMMUNICATIONMODULE

start diff additional heat

Setting range: 10 – 2,000 DM

Factory setting: 400 DM

hysteresis

Setting range: 10 – 2,000 DM

Factory setting: 100 DM

Make settings for the gas boiler GBM 10-15 here. Forexample . you can select when the gas boiler is to start.See the accessory installation instructions for a descrip-tion of function.

MENU 5.3.16 - HUMIDITY SENSOR

climate system 1 HTSSetting range: 1–4

Default value: 1

limit RH in the room, syst.Setting range: on/off

Factory setting: off

prevent condensation, syst.Setting range: on/off

Factory setting: off

limit RH in the room, syst.Setting range: on/off

Factory setting: off

Up to four humidity sensors (HTS 40) can be installed.

Here you select whether your system(s) is/are to limitthe relative humidity level (RH) during heating or coolingoperation.

You can also choose to limit min. cooling supply andcalculated cooling supply to prevent condensation onpipes and components in the cooling system.

See the Installer Manual for HTS 40 for function descrip-tion.

NIBE F1255PCChapter 8 | Control - Menus48

MENU 5.3.21 - FLOW SENSOR / ENERGYMETER

Supply temperature sensorset mode

Setting range: EMK150 / EMK300/310 / EMK500

Factory setting: EMK150

energy per pulse

Setting range: 0 – 10000 Wh

Factory setting: 1000 Wh

pulses per kWh

Setting range: 1 – 10000

Factory setting: 500

Energy meterset mode

Setting range: energy per pulse / pulses per kWh

Default value: energy per pulse

energy per pulse

Setting range: 0 – 10000 Wh

Factory setting: 1000 Wh

pulses per kWh

Setting range: 1 – 10000

Factory setting: 500

Up to two flow sensors (EMK) / energy meters can beconnected on the input board AA3, terminal block X22and X23. Select these in menu 5.2.4 - accessories.

Flow sensor (Energy measurement kit EMK)A flow sensor (EMK) is used to measure the amount ofenergy produced and supplied by the heating installationfor hot water and heating in the building.

The function of the flow sensor is to measure flow andtemperature differences in the charge circuit. The valueis presented in the display on a compatible product.

energy per pulse: Here you set the amount of energyto which each pulse will correspond.

pulses per kWh: Here you set the number of pulses perkWh that are sent to F1255PC.

Energy meter (Electricity meter)The energy meter(s) is used to send pulse signals everytime a certain amount of energy has been consumed.

energy per pulse: Here you set the amount of energyto which each pulse will correspond.

pulses per kWh: Here you set the number of pulses perkWh that are sent to F1255PC.

MENU 5.4 - SOFT IN/OUTPUTSHere you can select which input/output on the inputboard (AA3) the external contact function (page 24) mustbe connected to.

Selectable inputs on terminal block AUX 1-5 (AA3-X6:9-18) and output AA3-X7 on the input board.

MENU 5.5 - FACTORY SETTING SERVICEAll settings can be reset (including settings available tothe user) to default values here.

CautionWhen resetting, the start guide is displayedthe next time the heat pump is restarted.

MENU 5.6 - FORCED CONTROLYou can force control the different components in theheat pump and any connected accessories here.

NOTEForced control is only intended to be used fortroubleshooting purposes. Using the functionin any other way may cause damage to thecomponents in your climate system.

MENU 5.7 - START GUIDEWhen the heat pump is started for the first time thestart guide starts automatically. Start it manually here.

See page 30 for more information about the start guide.

MENU 5.8 - QUICK STARTIt is possible to start the compressor from here.

CautionThere must be a heating, cooling or hot waterdemand to start the compressor.

NOTEDo not quick start the compressor too manytimes over a short period of time, as this coulddamage the compressor and its surroundingequipment.

49Chapter 8 | Control - MenusNIBE F1255PC

MENU 5.9 - FLOOR DRYING FUNCTION

length of period 1 – 7Setting range: 0 – 30 days

Factory setting, period 1 – 3, 5 – 7: 2 days

Factory setting, period 4: 3 days

temp. period 1 – 7Setting range: 15 – 70 °C

Default value:

20 °Ctemp. period 130 °Ctemp. period 240 °Ctemp. period 345 Ctemp. period 440 °Ctemp. period 530 °Ctemp. period 620 °Ctemp. period 7

Set the function for under floor drying here.

You can set up to seven period times with differentcalculated flow temperatures. If less than seven periodsare to be used, set the remaining period times to 0 days.

Mark the active window to activate the underfloor dryingfunction. A counter at the bottom shows the number ofdays the function has been active. The function countsdegree minutes as during normal heating operation butfor the supply temperatures that are set for the respect-ive period.

NOTEDuring under floor drying, the heating mediumpump in 100% runs, regardless of the settingin menu 5.1.10.

TIPIf operating mode "add. heat only" is to be used,select it in menu 4.2.

For a more even flow temperature the additioncan be started earlier by setting "start for addi-tion" in menus 4.9.2 to -80. When set underfloor drying periods have stopped, reset themenus 4.2 and 4.9.2 as per previous settings.

TIPIt is possible to save a floor drying log thatshows when the concrete slab has reachedthe correct temperature. See section "Loggingfloor drying" on page 56.

MENU 5.10 - CHANGE LOGRead off any previous changes to the control systemhere.

The date, time, ID no. (unique to particular setting) andthe new set value are shown for every change.

CautionThe change log is saved at restart and remainsunchanged after factory setting.

NIBE F1255PCChapter 8 | Control - Menus50

Service actionsNOTEServicing should only be carried out by personswith the necessary expertise.

When replacing components on F1255PC onlyreplacement parts from NIBE may be used.

EMERGENCY MODE

NOTEThe switch (SF1) must not be moved to "" or" " until F1255PC has been filled with water.Component parts in the product can be dam-aged.

Emergency mode is used in event of operational inter-ference and in conjunction with service. Hot water isnot produced in emergency mode.

Emergency mode is activated by setting switch (SF1)in mode " ". This means that:

• The status lamp illuminates yellow.

• The display is not lit and the control computer is notconnected.

• The temperature at the immersion heater is controlledby the thermostat (FQ10). It can be set either to 35or 45 °C.

• The compressor and the brine system are off and onlythe heating medium pump and the electric additionalheat are active. The additional heat power in emer-gency mode is set in the immersion heater board(AA1). See page 23 for instructions.

LEK

LEK

GP1

GP2

QM2

QM1

The image shows an example of what a cooling sectioncould look like.

UN

F1255

QM34

SF1

QM32

QM33

QM31

FQ10

XL1

XL6

XL4 XL3

XL7

XL2

51Chapter 9 | ServiceNIBE F1255PC

9 Service

DRAINING THE HOT WATER HEATERThe siphon principle is used to empty the hot waterheater. This can be done either via the drain valve onthe incoming cold water pipe or by inserting a hose intothe cold water connection.

DRAINING THE CLIMATE SYSTEMIn order to carry out service on the climate system, itmay be easier to drain the system first. This can be donein different ways depending on what needs doing:

NOTEThere may be some hot water when drainingthe heating medium side/climate system. Thereis a risk of scalding.

Draining the heating medium side in thecooling moduleIf, for example, the heating medium pump requires re-placing or the cooling module requires servicing, drainthe heating medium side as follows:

1. Close the shut-off valves to heating medium side(QM31) and (QM32).

2. Connect a hose to the bleed valve (QM1) and openthe valve. Some liquid will run out.

3. Air must get into the system for the remaining liquidto run out. To let in air, slacken off the connectionslightly at the shut-off valve (QM32) that joins theheat pump with the cooling module.

When the heating medium side is empty, the requiredservice can be carried out and/or replacement of anycomponents carried out.

Draining the heating medium system in theheat pumpIf F1255PC requires servicing, drain the heating mediumside as follows:

1. Close the shut-off valves outside the heat pump forthe heating medium side (return and flow line).

2. Connect a hose to the bleed valve (QM1) and openthe valve. Some liquid will run out.

3. Air must get into the system for the remaining liquidto run out. To let in air, slacken off the connectionslightly at the shut-off valve that joins the heat pumpwith the cooling module (XL2).

When the heating medium side is empty, the requiredservice can be carried out.

Draining the entire climate systemIf the entire climate system requires draining, do this asfollows:

1. Connect a hose to the bleed valve (QM1) and openthe valve. Some liquid will run out.

2. Air must get into the system for the remaining liquidto run out. To allow air in, unscrew the bleed screwon the highest radiator in the house.

When the climate system is empty, the required servicecan be carried out.

EMPTYING THE BRINE SYSTEMIn order to service the brine system it may be easier todrain the system first. This can be done in different waysdepending on what needs doing:

Draining the brine system in the coolingmoduleIf, for example, the brine pump requires replacing or thecooling module requires servicing, drain the brine systemby:

1. Close the shut-off valves to brine system (QM33)and (QM34).

2. Connect a hose to the drain valve (QM2), place theother opening of the hose in a container and openthe valve. A small amount of brine will flow into thecontainer.

3. Air must get into the system in order for the remain-ing brine to run out. To let in air, slacken off theconnection slightly at the shut-off valve (QM33) thatjoins the heat pump with the cooling module.

When the brine system is empty, the required servicecan be carried out.

Draining the brine system in the heat pumpIf the heat pump requires servicing, drain the brine sys-tem by:

1. Close the shut-off valve outside the heat pump forthe brine system.

2. Connect a hose to the drain valve (QM2), place theother opening of the hose in a container and openthe valve. A small amount of brine will flow into thecontainer.

3. Air must get into the system for the remaining brineto run out. To let in air, slacken off the connectionslightly at the shut-off valve that joins the brine sidewith the heat pump at connection (XL7).

When the brine system is empty, the required servicecan be carried out.

HELPING THE CIRCULATION PUMP TOSTART1. Turn off F1255PC by setting the switch (SF1) to " ".

NIBE F1255PCChapter 9 | Service52

2. Remove the front cover

3. Remove the cover for the cooling module.

4. Loosen the venting screw (QM5) with a screwdriver.Hold a cloth around the screwdriver blade as a smallamount of water may run out.

5. Insert a screwdriver and turn the pump motoraround.

6. Screw in the venting screw (QM5).

7. Start F1255PC by setting the switch (SF1) to " " andcheck that the circulation pump is working.

It is usually easier to start the circulation pump withF1255PC running, and with the switch (SF1) set to " ". Ifthe circulation pump is helped to start while F1255PCis running, be prepared for the screwdriver to jerk whenthe pump starts.

GP1 QM5

The image shows an example of what a circulation pump can looklike.

TEMPERATURE SENSOR DATA

Voltage (VDC)Resistance(kOhm)

Temperature (°C)

3.256351.0-403.240251.6-353.218182.5-303.189133.8-253.15099.22-203.10574.32-153.04756.20-102.97642.89-52.88933.0202.78925.6152.67320.02102.54115.77152.39912.51202.24510.00252.0838.045301.9166.514351.7525.306401.5874.348451.4263.583501.2782.968551.1362.467601.0072.068650.8911.739700.7851.469750.6911.246800.6071.061850.5330.908900.4690.779950.4140.672100

PULLING OUT THE COOLING MODULEThe cooling module can be pulled out for service andtransport.

NOTESwitch off the heat pump and cut the powerwith the safety switch.

CautionRemove the front cover according to the de-scription on page 8.

53Chapter 9 | ServiceNIBE F1255PC

1. Close the shut-off valves (QM31), (QM32), (QM33)and (QM34).

Drain the compressor module according to the in-structions on page 52

F1255

F1255

QM33

QM32QM34

QM31

2. Pull off the lock catches.

3. Disconnect the pipe connection under the shut-offvalve (QM31).

LEK

3

2

QM31

4. Remove the two screws.

LEK

4

5. Remove the connection from the base card (AA2)using a screwdriver.

5

6. Disconnect the switches (A), (B) and (E) from theunderside of the base card cabinet.

F1255

E

7. Disconnect the connector (C) from the electric addi-tion PCB (AA1) using a screwdriver.

8. Disconnect the switch (D) from the joint board(AA100).

9. Carefully pull out the cooling module.

LEK

6A

B

7

C

D

8

9

5

E

TIPThe cooling module is installed in reverse order.

NIBE F1255PCChapter 9 | Service54

NOTEAt reinstallation, the supplied O-rings must re-place the existing ones at the connections tothe heat pump (see image).

F1255

F1255

QM33

QM32QM34

USB SERVICE OUTLET

LEK

The display unit is equipped with a USB socket that canbe used to update the software and save logged inform-ation in F1255PC.

INDOOR CLIMATE

HEAT PUMP INFO

HOTWATER

USB

update firmware

USB 7

logging

manage settings

When a USB memory is connected, a new menu (menu7) appears in the display.

Menu 7.1 - update firmware

update firmware7.1

start updating

choose another file

This allows you to update the software in F1255PC.

NOTEFor the following functions to work the USBmemory must contain files with software forF1255PC from NIBE.

The fact box at the top of the display shows information(always in English) of the most probable update that theupdate software has selected form the USB memory.

This information states the product for which the soft-ware is intended, the software version and general in-formation about it. If you want a file other than the oneselected, the correct file can be selected through"choose another file".

start updating

Select “start updating" if you want to start the update.You are asked whether you really want to update thesoftware. Respond "yes" to continue or "no" to undo.

If you responded"yes" to the previous question the up-date starts and you can now follow the progress of theupdate on the display. When the update is completeF1255PC restarts.

TIPA software update does not reset the menusettings in F1255PC.

CautionIf the update is interrupted before it is com-plete (for example power cut etc.), the soft-ware can be reset to the previous version ifthe OK button is held in during start up untilthe green lamp starts to illuminate (takes about10 seconds).

55Chapter 9 | ServiceNIBE F1255PC

choose another file

update firmware7.1

Select “choose another file" if you do not want to usethe suggested software. When you scroll through thefiles, information about the marked software is shownin a fact box just as before. When you have selected afile with the OK button you will return to the previouspage (menu 7.1) where you can choose to start the up-date.

Menu 7.2 - logging

logging7.2

activated

interval sec5

Setting range: 1 s – 60 min

Factory setting range: 5 s

Here you can choose how current measurement valuesfrom F1255PC should be saved onto a log file on theUSB memory.

1. Set the desired interval between loggings.

2. Tick “activated".

3. The present values from F1255PC are saved in a filein the USB memory at the set interval until “activ-ated" is unticked.

CautionUntick "activated" before removing the USBmemory.

Logging floor drying

Here you can save a floor drying log on the USB memoryand in this way see when the concrete slab reached thecorrect temperature.

• Make sure that "floor drying function" is activated inmenu 5.9.

• Select "logging floor drying activated".

• A log file is now created, where the temperature andthe immersion heater output can be read off. Loggingcontinues until "logging floor drying activated" isdeselected or until "floor drying function" is stopped.

CautionDeselect "logging floor drying activated" beforeyou remove the USB memory.

Menu 7.3 - manage settings

manage settings 7.3

save settings

recover settings

Here you can manage (save as or retrieve from) all themenu settings (user and service menus) in F1255PCwith a USB memory.

Via "save settings" you save the menu settings to theUSB memory in order to restore them later or to copythe settings to another F1255PC.

CautionWhen you save the menu settings to the USBmemory you replace any previously savedsettings on the USB memory.

Via "recover settings" you reset all menu settings fromthe USB memory.

CautionReset of the menu settings from the USBmemory cannot be undone.

NIBE F1255PCChapter 9 | Service56

In most cases, F1255PC notes a malfunction (a malfunc-tion can lead to disruption in comfort) and indicates thiswith alarms, and instructions for action, in the display.

INFO MENUAll the heat pump measurement values are gatheredunder menu 3.1 in the heat pump menu system. Lookingthrough the values in this menu can often simplify find-ing the source of the fault. See help menu or usermanual for more information about menu 3.1.

Manage alarm

info / action

reset alarm

aid mode

Low pressure alarm

alarm

In the event of an alarm, some kind of malfunction hasoccurred, which is indicated by the status lamp changingfrom green continuously to red continuously. In addition,an alarm bell appears in the information window.

ALARMIn the event of an alarm with a red status lamp a mal-function has occurred that the heat pump cannot remedyitself. In the display, by turning the control knob andpressing the OK button, you can see the type of alarmit is and reset it. You can also choose to set the heatpump to aid mode.

info / action Here you can read what the alarm meansand receive tips on what you can do to correct theproblem that caused the alarm.

reset alarm In many cases, it is sufficient to select “resetalarm” for the product to revert to normal operation. Ifa green light comes on after selecting “reset alarm”,the alarm has been remedied. If the red light is still on,and a menu called “alarm” is visible in the display, theproblem causing the alarm still remains.

aid mode “aid mode” is a type of emergency mode.This means that the heat pump produces heat and/orhot water even though there is some kind of problem.This could mean that the heat pump’s compressor isnot running. In this case, the immersion heater producesheat and/or hot water.

CautionTo select aid mode an alarm action must beselected in the menu 5.1.4.

CautionSelecting "aid mode” is not the same as cor-recting the problem that caused the alarm. Thestatus lamp will therefore continue to be red.

TroubleshootingIf the operational interference is not shown in the displaythe following tips can be used:

BASIC ACTIONSStart by checking the following items:

• The switch's (SF1) position.

• Group and main fuses of the accommodation.

• The property's earth circuit breaker.

• Miniature circuit breaker for F1255PC (FC1).

• Correctly set load monitor (if current sensors installed).

LOW HOT WATER TEMPERATURE OR NOHOT WATER• Mixing valve (if there is one installed) set too low.

– Adjust the mixer valve.

• F1255PC in incorrect operating mode.

– Enter menu 4.2. If mode "auto" is selected, select ahigher value on "stop additional heat" in menu 4.9.2.

– If mode "manual" is selected, select "addition".

• Large hot water consumption.

57Chapter 10 | Disturbances in comfortNIBE F1255PC

10 Disturbances in comfort

– Wait until the hot water has heated up. Temporarilyincreased hot water capacity (temporary lux) can beactivated in menu 2.1.

• Too low hot water setting.

– Enter menu 2.2 and select a higher comfort mode.

• Too low or no operating prioritisation of hot water.

– Enter menu 4.9.1 and increase the time for whenhot water is to be prioritised. Note that, if the timefor hot water is increased, the time for heating pro-duction is reduced, which can give lower/unevenroom temperatures.

LOW ROOM TEMPERATURE• Closed thermostats in several rooms.

– Set the thermostats to max, in as many rooms aspossible. Adjust the room temperature via menu1.1, instead of choking the thermostats.

See the "Saving tips" section in the User manual formore detailed information about how to best set thethermostats.

• Too low set value on the automatic heating control.

– Enter menu 1.1 "temperature" and adjust the offsetheating curve up. If the room temperature is onlylow in cold weather the curve slope in menu 1.9.1"heating curve" needs adjusting up.

• F1255PC in incorrect operating mode.

– Enter menu 4.2. If mode "auto" is selected, select ahigher value on "stop heating" in menu 4.9.2.

– If mode "manual" is selected, select "heating". If thisis not enough, select "addition".

• Too low or no operating prioritisation of heat.

– Enter menu 4.9.1 and increase the time for whenheating is to be prioritised. Note that if the time forheating is increased the time for hot water produc-tion is reduced, which can give smaller amounts ofhot water.

• "Holiday mode" activated in menu 4.7.

– Enter menu 4.7 and select "Off".

• External switch for changing room temperature activ-ated.

– Check any external switches.

• Air in the climate system.

– Vent the climate system (see page 29).

• Closed valves to the climate system.

– Open the valves.

HIGH ROOM TEMPERATURE• Too high set value on the automatic heating control.

– Enter menu 1.1 (temperature) and reduce the offsetheating curve. If the room temperature is only highin cold weather the curve slope in menu 1.9.1"heating curve" needs adjusting down.

• External switch for changing room temperature activ-ated.

– Check any external switches.

UNEVEN ROOM TEMPERATURE.• Incorrectly set heating curve.

– Fine-tune the heating curve in menu 1.9.1

• Too high set value on "dT at DOT"..

– Enter menu 5.1.14 (flow set. climate system) andreduce the value of "dT at DOT".

• Uneven flow over the radiators.

– Adjust the flow distribution between the radiators.

LOW SYSTEM PRESSURE• Not enough water in the climate system.

– Top up the water in the climate system (see page29).

COMPRESSOR DOES NOT START• There is no heating or cooling demand, nor hot water

demand or pool demand.

– F1255PC does not call on heating, cooling or hotwater.

• Compressor blocked due to the temperature condi-tions.

– Wait until the temperature is within the product’sworking range.

• Minimum time between compressor starts has notbeen reached.

– Wait for at least 30 minutes and then check if thecompressor has started.

• Alarm tripped.

– Follow the display instructions.

• "Additional heat only" is selected.

– Switch to "Auto" or "Manual" in menu 4.1 "Operatingmode".

WHINING NOISE IN THE RADIATORS• Closed thermostats in the rooms and incorrectly set

heating curve.

– Set the thermostats to max. in as many rooms aspossible. Adjust the heating curve via menu 1.1, in-stead of choking the thermostats.

NIBE F1255PCChapter 10 | Disturbances in comfort58

• Circulation pump speed set too high.

– Enter menu 5.1.11 (pump speed heating medium)and reduce the speed of the circulation pump.

• Uneven flow over the radiators.

– Adjust the flow distribution between the radiators.

GURGLING SOUNDThis part of the troubleshooting chapter only applies ifthe NIBE FLM accessory is installed.

• Not enough water in the water seal.

– Refill the water seal with water.

• Choked water seal.

– Check and adjust the condensation water hose.

59Chapter 10 | Disturbances in comfortNIBE F1255PC

Not all accessories are available on all markets.

ACCESSORY CARD AXC 40This accessory is used to enable connection and controlof shunt controlled additional heat, step controlled addition-al heat, external circulation pump or ground water pump.

Part no. 067 060

AUXILIARY RELAY HR 10Auxiliary relay HR 10 is used to control external 1 to 3phase loads such as oil burners, immersion heaters andpumps.

Part no 067 309

BASE EXTENSION EF 45This accessory is used to create a larger connection areaunder F1255PC.

Part no. 067 152

BUFFER VESSEL UKVUKV is an accumulator tank that is suitable for connectionto a heat pump or another external heat source, and canhave several different applications. It can also be usedduring external control of the heating system.

UKV 100Part no. 088 207

UKV 40Part no. 088 470

UKV 200Part no. 080 300

UKV 102Part no. 080 310

UKV 500Part no. 080 114

UKV 300Part no. 080 301

COMMUNICATION MODULE FOR SOLARELECTRICITY EME 20EME 20 is used to enable communication and controlbetween inverters for solar cells from NIBE and F1255PC.

Part no. 057 188

COMMUNICATIONS MODULE MODBUS 40MODBUS 40 enables F1255PC to be controlled andmonitored using a DUC (computer sub-centre) in thebuilding. Communication is then performed using MOD-BUS-RTU.

Part no 067 144

COMMUNICATIONS MODULE SMS 40When there is no internet connection, you can use theaccessory SMS 40 to control F1255PC via SMS.

Part no 067 073

ENERGY MEASUREMENT KIT EMK 300This accessory is installed externally and used to measurethe amount of energy that is supplied for the pool, hotwater, heating and cooling in the building.

Cu pipe Ø22.

Part no. 067 314

EXHAUST AIR MODULE NIBE FLMNIBE FLM is an exhaust air module designed to combinerecovery of mechanical exhaust air with ground sourceheating.

Bracket BAU 40Part no. 067 666

NIBE FLMPart no. 067 011

EXTERNAL ELECTRIC ADDITIONAL HEAT ELKThese accessories require accessories card AXC 40 (stepcontrolled addition).

ELK 8Electric heater8 kWPart no. 069 026

ELK 5Electric heater5 kWPart no. 069 025

ELK 2137-13 kW, 3 x 400 VPart no. 069 500

ELK 1515 kW, 3 x 400 VPart no. 069 022

NIBE F1255PCChapter 11 | Accessories60

11 Accessories

EXTRA SHUNT GROUP ECS 40/ECS 41This accessory is used when F1255PC is installed inhouses with two or more different heating systems thatrequire different supply temperatures.

ECS 41 (approx.80-250 m²)Part no 067 288

ECS 40 (Max 80 m²)Part no 067 287

FILLING VALVE KIT KB 25/32Valve kit for filling brine in the collector hose. Includesparticle filter and insulation.

KB 32 (max. 30 kW)Part no 089 971

KB 25 (max. 12 kW)Part no 089 368

GAS ACCESSORY

Communications module OPT 10OPT 10 is used to enable connection and control of gasboiler NIBE GBM 10-15.

Part no. 067 513

HUMIDITY SENSOR HTS 40This accessory is used to show and regulate humidity andtemperatures during both heating and cooling operation.

Part no. 067 538

LEVEL MONITOR NV 10Level monitor for extended checks of the brine level.

Part no. 089 315

MEASUREMENT KIT FOR SOLARGENERATED ELECTRICITY EME 10EME 10 is used to optimise the use of solar generatedelectricity. EME 10 measures the relevant current fromthe inverter via a current transformer and can work withall inverters.

Part no. 067 541

POOL HEATING POOL 40POOL 40 is used to enable pool heating with F1255PC.

Part no 067 062

ROOM UNIT RMU 40The room unit is an accessory that allows the control andmonitoring of F1255PC to be carried out in a different partof your home to where it is located.

Part no 067 064

SOLAR PACKAGE NIBE PVSolar panel package, 3 – 24 kW (10 – 80 panels), whichis used to produce your own electricity.

VENTILATION HEAT EXCHANGER ERSThis accessory is used to supply the accommodation withenergy that has been recovered from the ventilation air.The unit ventilates the house and heats the supply air asnecessary.

ERS 20-250Part no. 066 068

ERS 10-400Part no. 066 115

WATER HEATER/ACCUMULATOR TANK

AHPVolume expansion vesselthat is primarily used forexpanding the volume to-gether with AHPS.

Part no. 256 118

AHPSAccumulator tank withoutan immersion heater withsolar coil (copper) and a hotwater coil (stainless steel).

Part no. 256 119

AHPHAccumulator tank withoutan immersion heater withintegrated hot water coil(stainless steel).

Part no. 256 120

61Chapter 11 | AccessoriesNIBE F1255PC

Dimensions and setting-out coordinates620

600

560 440

70

1775

650*

25-5

0

25

50

130

210

390

470

525

650*

* This dimension applies at 90° angle on the brine pipes (side connection). The dimension can vary approx. ±100 mm vertically as the brinepipes consist in part of flexible pipes.

NIBE F1255PCChapter 12 | Technical data62

12 Technical data

Electrical data1X230V

F1255PC-6

Electrical data230V ~ 50HzRated voltage

15(16)ArmsMax operating current including 0 – 0.5 kW immersion heater (Recommended fuse rating).20(20)ArmsMax operating current including 1 – 1.5 kW immersion heater (Recommended fuse rating).24(25)ArmsMax operating current including 2 – 2.5 kW immersion heater (Recommended fuse rating).31(32)ArmsMax operating current including 3 – 4 kW immersion heater (Recommended fuse rating).33(40)ArmsMax operating current including 4.5 kW immersion heater (Recommended fuse rating).

0.5/1/1.5/2/2.5/3/3.5/4/4.5

kWAdditional power

3X400V

F1255PC-6

Electrical data400V 3N ~ 50HzRated voltage

12(16)ArmsMax operating current including 0 kW immersion heater (Recommended fuse rating).16(16)ArmsMax operating current including 0.5 – 6.5 kW immersion heater (Recommended fuse rating).

0.5/1/1.5/2/2.5/3/3.5/4/4.5/5/5.5/6/6.5

kWAdditional power

63Chapter 12 | Technical dataNIBE F1255PC

Technical specifications1X230V AND 3X400V

EnamelStainlessF1255PC

Output data according to EN 145111.5 – 6Heating capacity

0/35 nominal3.15kWRated output (PH)0.67kWSupplied power (PE)4.72COP

0/45 nominal2.87kWRated output (PH)0.79kWSupplied power (PE)3.61COP

10/35 nominal4.30kWRated output (PH)0.66kWSupplied power (PE)6.49COP

10/45 nominal3.98kWRated output (PH)0.83kWSupplied power (PE)4.79COP

SCOP according to EN 148256kWNominal heating output (designh)

5.5 / 4.1SCOPEN14825 cold climate, 35 °C / 55 °C5.2 / 4.0SCOPEN14825 average climate, 35 °C / 55 °C

Energy rating, average climateA+++ / A+++Efficiency class room heating 35 °C / 55 °C 1)

A+++ / A+++Space heating efficiency class of the system 35 °C / 55 °C2)

A / XLEfficiency class hot water / charging profile 3)

Noise36 – 43dB(A)Sound power level (LWA) acc to EN 12102 at 0/35

21 – 28dB(A)Sound pressure level (LPA) calculated values according to EN ISO 11203 at 0/35 and 1m range

Electrical data10 – 87WOutput, Brine pump2 – 63WOutput, Heating medium pumpIP21Enclosure class

Refrigerant circuitR407CType of refrigerant1,774GWP refrigerant1.16kgVolume2.06tonCO2 equivalent

3.2 (32 bar) / 0.15 (1.5 bar)MPaCut-out value pressure switch HP / LP-0.7 (-7 bar) / 0.15 (1.5 bar)MPaDifference pressure switch HP / LP

Brine circuit0.05 (0.5 bar) / 0.45 (4.5 bar)MPaMin/max system pressure brine

0.18l/sNominal flow (50 Hz)64kPaMax external avail. press at nom flow

see diagram°CMin/Max incoming Brine temp-12°CMin. outgoing brine temp.

Heating medium circuit0.05 (0.5 bar) / 0.45 (4.5 bar)MPaMin/Max system pressure heating medium

0.08l/sNominal flow (50 Hz)69kPaMax external avail. press at nom flow

see diagram°CMin/max HM-tempPipe connections

28mmBrine ext diam. CU pipe22mmHeating medium ext diam. CU pipes22mmHot water connection external diam22mmCold water connection external diam

Water heaterapprox. 180lVolume water heater1.0 (10 bar)MPaMax pressure in water heater

Hot water heating capacity (comfort mode Normal) According to EN16147

245Amount of hot water (40 °C)2.7COP DHW (load profile XL)

Compressor oilPOEOil type0.68lVolume

Dimensions and weight600mmWidth620mmDepth1800mmHeight

NIBE F1255PCChapter 12 | Technical data64

EnamelStainlessF1255PC

1950mmRequired ceiling height 4)

ERfCorrosion protection240205kgWeight complete heat pump

95kgWeight only cooling module065 293Part number, 1x230V

065 415065 272Part number, 3x400V065 490Part number, 3x400V, with energy meter

WORKING RANGE HEAT PUMP,COMPRESSOR OPERATIONThe compressor provides a supply temperature up to65 °C, at 0 °C incoming brine temperature, the remainder(up to 70°C) is obtained using the additional heat.

This diagram shows the working range below 75 % forF1255PC.

0-15 -10 -5 0 5 10 15 20 25 35

20

40

60

70

Vattentemperatur

(°C)

Köldbärare in

(°C)

30

Framledning

Returledning

50

30

10

Vattentemperatur

°C

Arbetsområde under 75% för F1155-1255 6kW,

för hela arbetsområdet 12 och 16 kW.

°C

Framledning

Returledning

0-15 -10 -5 0 5 10 15 20 25 30 35

20

10

30

40

50

60

70

Köldbärare in, temperatur

Temperature, °C

Flow pipe

Return pipe

Incoming brine temp, °C

This diagram shows the working range above 75 % forF1255PC

Vattentemperatur

°C

Arbetsområde över 75% för F1155-1255 6kW

°C

Framledning

Returledning

0-15 -10 -5 0 5 10 15 20 25 30 35

20

10

30

40

50

60

70

Köldbärare in, temperatur

Temperature, °C

Flow pipe

Return pipe

Incoming brine temp, °C

CautionFor operation of F1255PC above 75% com-pressor speed, unlocking in menu 5.1.24 is re-quired. This can produce a louder noise levelthan the value stated in the technical specifica-tions.

DIAGRAM, PASSIVE COOLINGPassive cooling, 21 °C return temperature nominal flowbrine/heating mediumPassiv kyla, 21 °C retur temp. nominelt flöde kb/vb

6 kW nominellt flöde

6 kW 2 x nominellt flöde

Angiven kyleffekt

kW

°C010 11 12 13 14 15

2

4

6

8

Köldbärare in, temperatur

Passiv kyla, 21 °C retur temp. nominelt flöde kb/vb

6 kW nominellt flöde

6 kW 2 x nominellt flöde

Angiven kyleffekt

kW

°C010 11 12 13 14 15

2

4

6

8

Köldbärare in, temperatur

6 kW nominal flow

6 kw 2 x nominal flow

Passiv kyla, 23 °C retur temp. nominelt flöde kb/vb

6 kW nominellt flöde

6 kW 2 x nominellt flöde

Angiven kyleffekt

kW

°C010 11 12 13 14 15

2

4

6

8

Köldbärare in, temperatur

Eliminated power, kW

Incoming brine temp, °C

Passive cooling, 23 °C return temperature nominal flowbrine/heating mediumPassiv kyla, 23 °C retur temp. nominelt flöde kb/vb

6 kW nominellt flöde

6 kW 2 x nominellt flöde

Angiven kyleffekt

kW

°C010 11 12 13 14 15

2

4

6

8

Köldbärare in, temperatur

Passiv kyla, 21 °C retur temp. nominelt flöde kb/vb

6 kW nominellt flöde

6 kW 2 x nominellt flöde

Angiven kyleffekt

kW

°C010 11 12 13 14 15

2

4

6

8

Köldbärare in, temperatur

6 kW nominal flow

6 kw 2 x nominal flow

Passiv kyla, 23 °C retur temp. nominelt flöde kb/vb

6 kW nominellt flöde

6 kW 2 x nominellt flöde

Angiven kyleffekt

kW

°C010 11 12 13 14 15

2

4

6

8

Köldbärare in, temperatur

Eliminated power, kW

Incoming brine temp, °C

DIAGRAM, DIMENSIONING COMPRESSORSPEED

Heating mode 35 °CUse this diagram to dimension the heat pump. Thepercentages show approximate compressor speed.

65Chapter 12 | Technical dataNIBE F1255PC

F1255PC

Specified heating output, kW

0-10 -5 0 5 10 15 20 25 30

4

2

6

8

10

Köldbärare in, temperatur

75%

Avgiven värmeeffekt

kW

°C

Dimensionering kompr. hastighet för F1155-1255 -6 kW.

100%

50%

1%

Incoming brine temp, °C

Cooling mode

CautionTo dimension heating dump, see the diagramfor heating operation.

Supply temperature, heating medium 35 °°C

F1255PC

Specified cooling output, kW

Framledningstemp. Värmebärare 35 °C för F1155-1255 -6 kW.

Avgiven kyleffekt

kW

°C0-10 -5 0 5 10 15 20 25 30

5

4

3

2

1

6

7

8

9

10

Köldbärare in, temperatur

100%

50%

1%

Incoming brine temp, °C

Supply temperature, heating medium 50 °°C

F1255PC

Specified cooling output, kW

Framledningstemp. Värmebärare 50 °C för F1155-1255 -6 kW.

Avgiven kyleffekt

kW

°C0

1

-10 -5 0 5 10 15 20 25 30

4

5

2

3

7

6

8

9

10

Köldbärare in, temperatur

100%

50%

1%

Incoming brine temp, °C

NIBE F1255PCChapter 12 | Technical data66

Energy labellingINFORMATION SHEET

NIBE ABSupplier

F1255PC 1x230VModel

35 / 55°CTemperature application

XLDeclared load profile for water heating

A+++ / A+++Seasonal space heating energy efficiency class, aver-age climate

AWater heating energy efficiency class, average climate

6kWRated heat output (Pdesignh), average climate2,188 / 2,875kWhAnnual energy consumption space heating, average

climate1,642kWhAnnual energy consumption water heating, average

climate200 / 150%Seasonal space heating energy efficiency, average

climate102%Water heating energy efficiency, average climate42dBSound power level LWA indoors6kWRated heat output (Pdesignh), cold climate6kWRated heat output (Pdesignh), warm climate

2,481 / 3,287kWhAnnual energy consumption space heating, cold cli-mate

1,642kWhAnnual energy consumption water heating, cold cli-mate

1,408 / 1,852kWhAnnual energy consumption space heating, warm cli-mate

1,642kWhAnnual energy consumption water heating, warm cli-mate

211 / 157%Seasonal space heating energy efficiency, cold climate102%Water heating energy efficiency, cold climate

201 / 151%Seasonal space heating energy efficiency, warm cli-mate

102%Water heating energy efficiency, warm climate-dBSound power level LWA outdoors

NIBE ABSupplier

F1255PC 3x400VModel

35 / 55°CTemperature application

XLDeclared load profile for water heating

A+++ / A+++Seasonal space heating energy efficiency class, aver-age climate

AWater heating energy efficiency class, average climate

6kWRated heat output (Pdesignh), average climate2,188 / 2,875kWhAnnual energy consumption space heating, average

climate1,642kWhAnnual energy consumption water heating, average

climate200 / 150%Seasonal space heating energy efficiency, average

climate102%Water heating energy efficiency, average climate42dBSound power level LWA indoors6kWRated heat output (Pdesignh), cold climate6kWRated heat output (Pdesignh), warm climate

2,481 / 3,287kWhAnnual energy consumption space heating, cold cli-mate

1,642kWhAnnual energy consumption water heating, cold cli-mate

1,408 / 1,852kWhAnnual energy consumption space heating, warm cli-mate

1,642kWhAnnual energy consumption water heating, warm cli-mate

211 / 157%Seasonal space heating energy efficiency, cold climate102%Water heating energy efficiency, cold climate

201 / 151%Seasonal space heating energy efficiency, warm cli-mate

102%Water heating energy efficiency, warm climate-dBSound power level LWA outdoors

67Chapter 12 | Technical dataNIBE F1255PC

DATA FOR ENERGY EFFICIENCY OF THE PACKAGE

F1255PC 1x230VModel

35 / 55°CTemperature application

VIController, class4%Controller, contribution to efficiency

204 / 154%Seasonal space heating energy efficiency of thepackage, average climate

A+++Seasonal space heating energy efficiency class of thepackage, average climate

215 / 161%Seasonal space heating energy efficiency of thepackage, cold climate

205 / 155%Seasonal space heating energy efficiency of thepackage, warm climate

F1255PC 3x400VModel

35 / 55°CTemperature application

VIController, class4%Controller, contribution to efficiency

204 / 154%Seasonal space heating energy efficiency of thepackage, average climate

A+++Seasonal space heating energy efficiency class of thepackage, average climate

215 / 161%Seasonal space heating energy efficiency of thepackage, cold climate

205 / 155%Seasonal space heating energy efficiency of thepackage, warm climate

The reported efficiency of the package also takes the controller into account. If an external supplementary boiler or solar heating is added tothe package, the overall efficiency of the package should be recalculated.

NIBE F1255PCChapter 12 | Technical data68

TECHNICAL DOCUMENTATION

F1255PC 1x230VModel

Air-water

Exhaust-water

Brine-water

Water-water

Type of heat pump

Yes NoLow-temperature heat pump

Yes NoIntegrated immersion heater for additional heat

Yes NoHeat pump combination heater

Average Cold WarmClimate

Average (55 °C) Low (35 °C)Temperature application

EN-14825 & EN-16147Applied standards%150ƞsSeasonal space heating energy efficiencykW5,5PratedRated heat output

Declared coefficient of performance for space heating at part load and at outdoortemperature Tj

Declared capacity for space heating at part load and at outdoor temperature Tj

-3.06COPdTj = -7 °CkW5.0PdhTj = -7 °C-3.97COPdTj = +2 °CkW3.0PdhTj = +2 °C-4.63COPdTj = +7 °CkW2.0PdhTj = +7 °C-4.86COPdTj = +12 °CkW1.2PdhTj = +12 °C-2.84COPdTj = bivkW5.4PdhTj = biv-2.84COPdTj = TOLkW5.4PdhTj = TOL-COPdTj = -15 °C (if TOL < -20 °C)kWPdhTj = -15 °C (if TOL < -20 °C)

°C-10TOLMin. outdoor air temperature°C-10TbivBivalent temperature-COPcycCycling interval efficiencykWPcychCycling interval capacity

°C65WTOLMax supply temperature-0.99CdhDegradation coefficient

Additional heatPower consumption in modes other than active modekW0.1PsupRated heat outputkW0.002POFFOff mode

kW0.007PTOThermostat-off modeElectricType of energy inputkW0.007PSBStandby mode

kW0.009PCKCrankcase heater mode

Other itemsm3/hRated airflow (air-water)VariableCapacity controlm3/hNominal heating medium flowdB42 / -LWASound power level, indoors/outdoorsm3/h0.68Brine flow brine-water or water-water heat pumpskWh2,875QHEAnnual energy consumption

For heat pump combination heater%102ƞwhWater heating energy efficiencyXLDeclared load profile for water heating

kWhQfuelDaily fuel consumptionkWh7.73QelecDaily energy consumptionGJAFCAnnual fuel consumptionkWh1,642AECAnnual energy consumption

NIBE Energy Systems – Box 14 – Hannabadsvägen 5 – 285 21 Markaryd – SwedenContact information

69Chapter 12 | Technical dataNIBE F1255PC

F1255PC 3x400VModel

Air-water

Exhaust-water

Brine-water

Water-water

Type of heat pump

Yes NoLow-temperature heat pump

Yes NoIntegrated immersion heater for additional heat

Yes NoHeat pump combination heater

Average Cold WarmClimate

Average (55 °C) Low (35 °C)Temperature application

EN-14825 & EN-16147Applied standards%150ƞsSeasonal space heating energy efficiencykW5,5PratedRated heat output

Declared coefficient of performance for space heating at part load and at outdoortemperature Tj

Declared capacity for space heating at part load and at outdoor temperature Tj

-3.06COPdTj = -7 °CkW5.0PdhTj = -7 °C-3.97COPdTj = +2 °CkW3.0PdhTj = +2 °C-4.63COPdTj = +7 °CkW2.0PdhTj = +7 °C-4.86COPdTj = +12 °CkW1.2PdhTj = +12 °C-2.84COPdTj = bivkW5.4PdhTj = biv-2.84COPdTj = TOLkW5.4PdhTj = TOL-COPdTj = -15 °C (if TOL < -20 °C)kWPdhTj = -15 °C (if TOL < -20 °C)

°C-10TOLMin. outdoor air temperature°C-10TbivBivalent temperature-COPcycCycling interval efficiencykWPcychCycling interval capacity

°C65WTOLMax supply temperature-0.99CdhDegradation coefficient

Additional heatPower consumption in modes other than active modekW0.1PsupRated heat outputkW0.002POFFOff mode

kW0.007PTOThermostat-off modeElectricType of energy inputkW0.007PSBStandby mode

kW0.009PCKCrankcase heater mode

Other itemsm3/hRated airflow (air-water)VariableCapacity controlm3/hNominal heating medium flowdB42 / -LWASound power level, indoors/outdoorsm3/h0.68Brine flow brine-water or water-water heat pumpskWh2,875QHEAnnual energy consumption

For heat pump combination heater%102ƞwhWater heating energy efficiencyXLDeclared load profile for water heating

kWhQfuelDaily fuel consumptionkWh7.48QelecDaily energy consumptionGJAFCAnnual fuel consumptionkWh1,642AECAnnual energy consumption

NIBE Energy Systems – Box 14 – Hannabadsvägen 5 – 285 21 Markaryd – SwedenContact information

NIBE F1255PCChapter 12 | Technical data70

A

Accessibility, electrical connection, 19Accessories, 60Alarm, 57Assembly, 7

B

Back button, 34Brine side, 16

C

Cable lock, 20Cold and hot water, 17

Connecting cold and hot water, 17Commissioning and adjusting, 29

Filling and venting, 29Post adjustment and bleeding, 30Preparations, 29Start guide, 30

Connecting accessories, 27Connecting current sensors, 24Connecting external operating voltage for the controlsystem, 21Connecting the climate system, 16Connections, 21Control, 34, 38

Control - Introduction, 34Control - Menus, 38

Control - Introduction, 34Display unit, 34Menu system, 35

Control knob, 34Controlling ground water pump, 27Control - Menus, 38

Menu 5 - SERVICE, 40Cooling mode indication, 27Cooling section, 13

D

Data for energy efficiency of the system, 68Delivery and handling, 7

Assembly, 7Drawing out the cooling module, 7Installation area, 7Removing parts of the insulation, 9Removing the covers, 8Supplied components, 8Transport, 7

Diagram, dimensioning compressor speed, 65

Diagram, passive cooling output, 65Dimensions and pipe connections, 15Dimensions and setting-out coordinates, 62Display, 34Display unit, 34

Back button, 34Control knob, 34Display, 34OK button, 34Status lamp, 34Switch, 34

Disturbances in comfort, 57Alarm, 57Manage alarm, 57Troubleshooting, 57

Docking alternatives, 17Ground water system, 17Neutralization vessel, 17Pool, 18Two or more climate systems, 18Ventilation recovery, 18

Draining the climate system, 52Draining the hot water heater, 52Drawing out the cooling module, 7, 53

E

Electrical addition - maximum output, 22Setting max electrical output, 23

Electrical cabinets, 12Electrical connections, 19

Accessibility, electrical connection, 19Cable lock, 20Connecting accessories, 27Connecting external operating voltage for the controlsystem, 21Connections, 21Electrical addition - maximum output, 22External connection options, 25General, 19Load monitor, 24Miniature circuit-breaker, 19NIBE Uplink, 25Optional connections, 24Outdoor sensor, 22Power connection, 21Removing the cover, base board, 20Removing the cover, immersion heater circuitboard, 20

71Item registerNIBE F1255PC

Item register

Removing the hatch, input circuit board, 20Room sensor, 22Settings, 22Standby mode, 23Temperature limiter, 19Temperature sensor, external flow line, 22

Emptying the brine system, 52Energy labelling, 67

Data for energy efficiency of the package, 68Information sheet, 67Technical documentation, 69–70

External connection options, 25Controlling ground water pump, 27Cooling mode indication, 27Extra circulation pump, 27Hot water circulation, 27Possible selection for AUX inputs, 25Possible selection for AUX output (potential freevariable relay), 27

Extra circulation pump, 27

F

Filling and venting, 29Filling and venting the brine system, 29Filling and venting the climate system, 29Filling the hot water heater, 29

Filling and venting the brine system, 29Filling and venting the climate system, 29Filling the hot water heater, 29

H

Heating medium side, 16Connecting the climate system, 16

Helping the circulation pump to start, 52Help menu, 37Hot water circulation, 27

I

Important information, 4Recovery, 5

Information sheet, 67Inspection of the installation, 6Installation alternative

Water heater with immersion heater, 17Installation area, 7

M

Manage alarm, 57Marking, 4Menu 5 - SERVICE, 40Menu system, 35

Help menu, 37Operation, 36Scroll through the windows, 37Selecting menu, 36Selecting options, 36Setting a value, 36Use the virtual keyboard, 37

Miniature circuit-breaker, 19

N

NIBE Uplink, 25

O

OK button, 34Operation, 36Optional connections, 24Outdoor sensor, 22

P

Pipe connections, 14Brine side, 16Cold and hot water

Connecting cold and hot water, 17Dimensions and pipe connections, 15Docking alternatives, 17General, 14Heating medium side, 16Pipe dimensions, 15Symbol key, 15System diagram, 15

Pipe dimensions, 15Possible selection for AUX inputs, 25Possible selection for AUX output (potential free variablerelay), 27Post adjustment and bleeding, 30

Pump adjustment, automatic operation, 30Pump adjustment, manual operation, 31Pump capacity diagram, brine side, manual opera-tion, 31Readjusting, venting, heat medium side, 31–32

Power connection, 21Preparations, 29Pump adjustment, automatic operation, 30

Brine side, 30Heating medium side, 31

Pump adjustment, manual operation, 31Heating medium side, 31

Pump capacity diagram, brine side, manual operation, 31

R

Readjusting, venting, heat medium side, 31–32Remove parts of the insulation, 9Removing the cover, base board, 20Removing the cover, immersion heater circuit board, 20Removing the covers, 8Removing the hatch, input circuit board, 20Room sensor, 22

S

Safety informationInspection of the installation, 6Marking, 4Serial number, 5Symbols, 4

Scroll through the windows, 37Selecting menu, 36Selecting options, 36Serial number, 5Service, 51

Service actions, 51Service actions, 51

Draining the climate system, 52Draining the hot water heater, 52

NIBE F1255PCItem register72

Drawing out the cooling module, 53Emptying the brine system, 52Helping the circulation pump to start, 52Standby mode, 51Temperature sensor data, 53USB service outlet, 55

Setting a value, 36Settings, 22Standby mode, 51

Power in emergency mode, 23Start guide, 30Status lamp, 34Supplied components, 8Switch, 34Symbol key, 15Symbols, 4System diagram, 15

T

Technical data, 62Dimensions and setting-out coordinates, 62Energy labelling, 67

Data for energy efficiency of the system, 68Information sheet, 67Technical documentation, 69

Technical Data, 64Technical Data, 64

Diagram, dimensioning compressor speed, 65Diagram, passive cooling output, 65Working range heat pump, 65

Technical documentation, 69Temperature limiter, 19

Resetting, 19Temperature sensor, external flow line, 22Temperature sensor data, 53The heat pump design, 10

Component list cooling section, 13Component list electrical cabinets, 12Component location cooling section, 13Component location electrical cabinets, 12Component locations, 10List of components, 10

Transport, 7Troubleshooting, 57

U

USB service outlet, 55Use the virtual keyboard, 37

W

Working range heat pump, 65

73Item registerNIBE F1255PC

Contact information

DENMARKCZECH REPUBLICAUSTRIA

Vølund Varmeteknik A/SIndustrivej Nord 7B, 7400 HerningTel: +45 97 17 20 33info@volundvt.dkvolundvt.dk

Družstevní závody Dražice - strojírnas.r.o.Dražice 69, 29471 Benátky n. Jiz.Tel: +420 326 373 801nibe@nibe.cznibe.cz

KNV Energietechnik GmbHGahberggasse 11, 4861 SchörflingTel: +43 (0)7662 8963-0mail@knv.atknv.at

GERMANYFRANCEFINLAND

NIBE Systemtechnik GmbHAm Reiherpfahl 3, 29223 CelleTel: +49 (0)5141 75 46 -0info@nibe.denibe.de

NIBE Energy Systems France SASZone industrielle RD 28Rue du Pou du Ciel, 01600 ReyrieuxTél: 04 74 00 92 92info@nibe.frnibe.fr

NIBE Energy Systems OyJuurakkotie 3, 01510 VantaaTel: +358 (0)9 274 6970info@nibe.finibe.fi

NORWAYNETHERLANDSGREAT BRITAIN

ABK-Qviller ASBrobekkveien 80, 0582 OsloTel: (+47) 23 17 05 20post@abkqviller.nonibe.no

NIBE Energietechniek B.V.Energieweg 31, 4906 CG OosterhoutTel: +31 (0)168 47 77 22info@nibenl.nlnibenl.nl

NIBE Energy Systems Ltd3C Broom Business Park,Bridge Way, S41 9QG ChesterfieldTel: +44 (0)845 095 1200info@nibe.co.uknibe.co.uk

SWEDENRUSSIAPOLAND

NIBE Energy SystemsBox 14Hannabadsvägen 5, 285 21 MarkarydTel: +46 (0)433-27 3000info@nibe.senibe.se

EVANbld. 8, Yuliusa Fuchika str.603024 Nizhny NovgorodTel: +7 831 419 57 06kuzmin@evan.runibe-evan.ru

NIBE-BIAWAR Sp. z o.o.Al. Jana Pawla II 57, 15-703 BialystokTel: +48 (0)85 66 28 490biawar.com.pl

SWITZERLAND

NIBE Wärmetechnik c/o ait SchweizAGIndustriepark, CH-6246 AltishofenTel. +41 (0)58 252 21 00info@nibe.chnibe.ch

For countries not mentioned in this list, contact NIBE Sweden or check nibe.eu for more information.

NIBE Energy SystemsHannabadsvägen 5Box 14SE-285 21 Markarydinfo@nibe.senibe.eu

IHB

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This manual is a publication from NIBE Energy Systems. All product illustrations, facts anddata are based on the available information at the time of the publication’s approval.NIBE Energy Systems makes reservations for any factual or printing errors in this manual.

©2020 NIBE ENERGY SYSTEMS 331170

WS name: -GemensamtWS version: a767WS release date: 2020-03-02 10:13Publish date: 2020-04-14 11:25