Boiler Controller - with DHW Control

Main FeaturesControls 1 or 2 Boilers & Pumps,1 Heating Zone Valve and 1 DHWCalorifier

Additional Boilers, Heating Zones /DHW services by adding modules

Self adapting Weather Compensation

System Housekeeping function

Boiler plant operates on demand fromthe building, not a fixed timeprogramme

DDaattaa SShheeeett BB33

SeaChange Data Sheet B3 Part No LIT / DAT / BLR / 003 Iss 4.0 Sept. 98 Page 1 of 12

P r o v i d e rM o d u l e

Detailed FeaturesGeneral

This Boiler Controller is aimed primarily atsmall commercial buildings which havesimple, domestic-style plant.

The Boiler Controller is a Provider Module inthe SeaChange system; that means that itprovides heat energy to Distributor Modules(controlling secondary circuits which distributeenergy) or Consumer Modules (which areresponsible for using the energy). It will onlyfunction when it receives Demand signalsfrom these other modules (or if it has internaldemand for DHW, see below); in this way, theplant will only run when it is needed, ratherthan on a timed basis as in common in con-ventional control schemes.

Heating and DHW demand signalsThis Boiler Controller has built-in controls for1 zone of Domestic Hot Water, with a locallywired temperature sensor to measure DHWtemperature, an output for an On/Off valveand an internal setpoint (set on parameterHWSP). The Heating valve is controlled byone or more Zone Controllers (ConsumerModules); the Occupancy Status of all theConsumer Modules will be used to setOccupancy Times for the DHW service.

If no internal Domestic Hot Water demandexists, the Boiler Flow Temperature setpointwill equal the Heating setpoint which isgenerated by Zone Controller demand (seeWeather Compensation and Trim, later)..If a DHW demand exists, the Boiler FlowTemperature setpoint will automatically beraised to 10 degC above the DHW setpoint(HWSP).This will normally exceed thesetpoint required by the Heating circuit, so theHeating valve will be opened and closed on atime proportioned basis to control thetemperature in the Heating circuit to theHeating setpoint. The minimum-on timeconstant for this feature, (which representsthe shortest time that the Heating valve willopen for) is set using the PERD parameter, oralternatively can be set using the SELECTpushbutton If multiple demands are being received fromother modules requiring Primary CT water (forinstance, another VT circuit controlled by aSecondary Circuit Controller, or anotherDomestic Hot Water load) the Boiler FlowTemperature setpoint will automatically beraised to the correct value to satisfy theModule with the highest demand. Modulesthat require Primary (CT) water send theirDemand signals in the form of a setpoint,which is high enough to account for Primarylosses.

Auxiliar y PowerSuppl y connector sare connected to theSystem PSU Aux supply or24V AC to provide powerfor the Boiler Controller’srelay coils

Auxiliar y Power OKlamp indicates that theauxiliary supply is healthy

Relay Outputconnector sare for connection to thecontrolled devices.

Features

Typical Application

Selectis used during commission-ing to allow a ZoneController to display theEngineering Parameters ofthis controller. Also used toset TP period for HeatingValve (see CommissioningGuide for details).

Plant Sc hematic diagram shows type of plant to becontrolled

Relay status lampsindicate when the outputrelays are energised

Primary/Circulation

Pumps(1 or 2)

1 or 2Boilers

ReturnTemperature

Outside AirTemperature

HeatingValve

To Heating Zone

DHWTemperature

Flow Temperature

Must fit Flow or Return sensor - preferably both

Must fit Outside Temperature sensor or connectNetworked Outside Sensor

DHW Temperature sensor needed if DHW valvepresent

SeaChange Data Sheet B3 Part No LIT / DAT / BLR / 003 Iss 4.0 Sept. 98 Page 2 of 12

TemperatureIndicatorindicates how far the boilerflow temperature is fromsetpoint.Green = close to setpoint.Boilers will fire and pumpswill run intermittentlyAmber = above setpoint.Boilers will cease firing,pumps will stopRed = below setpoint.Boilers will fire and pumpswill run frequently

Status Lampindicates that the BoilerController is receivingdemand signals from othercontrollers if lit steadily, alsoindicates that controller is inConfiguration Mode (slowflashing) or MaintenanceMode (rapid flashing)

Network connector sTwo pairs are fitted tofacilitate star wiring of thenetwork, or to allowtemporary local connectionof a Zone Controller to actas a display duringcommissioning.Twisted pair, unscreenedcable is required.

Input Connector s are for connection of theTemperature sensors andalarm inputs. Twisted pair,unscreened cable isrequired.

Registration Button is used during the commis-sioning process to buildlogical links betweencontrollers

Overrideis used to change fromNormal to Maintenancemode; Maintenance modewill allow the plant to runwithout demand signalsfrom the Zone Controllers,which is useful for plantmaintenance outside of thenormal heating season. (see Detailed Features inthis Data Sheet for furtherinformation).

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Heating and DHW valves are On/Off, springreturn types. Pumps may be used instead.

DHWValve

Typical System

External Alarm or Status Signals

Valve will Time Proportion whenPrimary temperature exceedsheating requirement. Actuator Controllers are registered to Zone

Controllers, and will energise pump whenZone demands heating.

DHW temperature controlled by BoilerController. Operating times for DHW areset by combining times from both ZoneControllers.

Zone Controllers are registered to the BoilerController. Demand signals from Zones willset heating flow temperature.

Loc kout Alarms

SetALRM

to 1 or 2

Boiler aLockout

Boiler bLockout

Summer/Winter Boiler Chang eover

SetALRM

to 1

SummerWinter

Winterboiler on

Summerboiler

General Monitoring System ST OP Alarm

SetALRM

to 4

SetALRM

to 0Pressurisation

unit lowpressure alarm

StatusPoint

‘b’

Optionaladditional

status point

StatusPoint

‘a’

SeaChange Data Sheet B3 Part No LIT / DAT / BLR / 003 Iss 4.0 Sept. 98 Page 3 of 12

Primary Pump On/OffValve

On/OffValve

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Detailed Features

SubmodulesBoiler Controllers may have a number of Submoduleswhich extend its control capabilities; these can be asfollows:Max Submodule Type FunctionNo.4 Cascade Module additional stages of

boilers (8 max)or:4 Actuator Controller driven by boiler demand

signals; can use AOP version for modulating burner control

also:3 Changeover Modules for Auto Changeover of

Primary or VT pumpsets1 Networked Outside Sensor

for sites with difficult cable runs for conventional sensor

RegistrationRegistration is the simple process by which logicalconnections are made between Controllers in aSeaChange system; it is done at time of commissioningand involves pressing buttons on the Controllers in aspecific sequence**. Registration of Secondary Boiler ControllersSecondary Boiler Controllers must be registered withthe Controller in the system which is performing SystemHousekeeping Functions, (usually a Boiler Controller).This part of the registration process will allocate asystem address to the Secondary Boiler Controller. TheRegister button on the Secondary Boiler is pressed, andits Status lamp will flash to indicate its address (HeatSource) number**.Registration of Boiler Controller SubmodulesIf the Boiler Controller has Submodules to controlpumpsets, additional boiler stages etc, they must beRegistered to the Boiler Controller. The Boiler Controlleris put into Configuration Mode, and the Submodules areRegistered to it.**.Registration of Consumer or Distributor Modules - Demand LinkingThe Boiler Controller must be provided with at least onedemand signal from another module - otherwise it willnot run (it is demand-driven). The Boiler Controller is putinto Configuration Mode, and the Consumer andDistributor Modules that it feeds with heat energy areRegistered to it.**This sets the HTSC parameter in each Consumer orDistributor Module to “point” their Heating Demandsignals at the Boiler Controller. Zone and Slave Zone Controllers Registered in this waywill generate demands for the local Secondary (VT)circuit controlled by the Boiler Controller; other Modules(e.g. Secondary Circuit Controllers, AHU Controllers,DHW Controllers) will generate CT demands for thePrimary circuit.

These parameters could be manually set in eachController as an alternative to this part of the Registra-tion process, if desired.**For further details of the registration process, see ourpublication “Commissioning Guide”.

AlarmsThe Boiler Controller may be set to generate Alarms,which may be sent to a Doorway Supervisor or otherNetwork Alarm device. Alarms may be enabled bysetting the ALRM parameter. The text strings generatedat Doorway are as follows;Alarm Text MeaningNOAL No Alarms in the Controller (all

cleared)GENA general alarm input channel ‘a’GENB general alarm input channel ‘b’LOKA lockout alarm input channel ‘a’LOKB lockout alarm input channel ‘b’FREZ danger of freezing alarmSTOP System stop alarm (e.g. firelink)OUTF outside temperature fail alarm

Danger of FreezingThis Alarm is generated when any of the connectedwater temperature sensors (Flow, Return or VT sensor)shows a reading below 3 deg C; implying the FrostProtection strategy has failed.Outside Sensor F ailedThis Alarm is generated when either the locally wiredthermistor sensor fails (to open or short circuit), or if aNetworked Outside Sensor is used, the alarm will besent if this device fails.External Alarm InputsThe 2 external inputs ‘a’ and ‘b’ may be used formonitoring purposes only, or alarm generation, or alarmgeneration with plant shutdown. The ALRM parameteris used to set the desired action, and the ALSTparameter is used to set the sense (ie. whether aclosing or opening contact generates an alarm) of theinputs.Status Monitoring only may be selected by settingALRM to O; the status of inputs can be read onparameters INPA and INPB.Status Monitoring with Alarms is selected with ALRMset to 3; this generates a GENA/B Alarm, but takes noControl action.Boiler Stage Shutdown, no Alarms is often used forMaintenance switches, or Summer/Winter Boilerchangeover switches. Set ALRM to 1.Boiler Stage Shutdown, Lockout Alarm is often usedfor Lockout signals; set ALRM to 2 (generates LOKA/Balarms).General Plant Shutdown, Stop Alarm ; this uses thecritical alarm signal wired to input ‘a’ (input ‘b’ isavailable for another signal). An event on input ‘a’ (e.g.a Fire Alarm) will shut down all Controller outputs andall other plant which is set to respond to a STOP Alarm.Set ALRM to 4

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SeaChange Data Sheet B3 Part No LIT / DAT / BLR / 003 Iss 4.0 Page 5 of 12

Detailed Features

DHW PriorityThe DHWP parameter may be set to give priority toDHW where the plant is sized for Heating or DHW, butnot both, or where a fast DHW recovery is required; ifthis is used, the heating will be disabled until all DHWservices are up to temperature.

Flow & Return Temperature Contr olThe Boiler Controller is capable of several differentmethods of controlling Flow and Return Temperatures.All of them are based on the principle of controlling tothe lowest possible water temperature in order tominimise circulation losses; the Controller decides whichmethod to use depending on which sensors areconnected to it.If just a Flow Temperature sensor is connected, theController will control using a Flow Temperaturesetpoint. If just a Return Temperature sensor is fitted, itwill control using a Return Temperature setpoint. If bothare fitted, an average value is used, which is usually thebest method. However, parameter SACT may be usedto force the controller to use Flow or Return control ifdesired.MAXF and MINR are used to set the Maximum Flowand Minimum Return Temperatures; the MinimumReturn Temperature is important for protecting someboilers against back-end corrosion.

Boiler Sequencing and Duty RotationMultiple Boilers will be automatically rotated in theirsequence on the basis of “longest running boiler goesoff first”. This equalises running hours of the boilers, andalso gives good controllability under part load conditions.A Fixed sequence version of the Boiler Controller isavailable if required (See back page for order code).Thisis useful where modular boilers must be brought on in afixed sequence, or where single and two stage boilersare mixed.

Pump Contr ol and DemandTo maximise energy efficiency,normally the heating willrun only when a heating demand exists; when the Zonesare satisfied, the valve will close. If, however, the ZoneControllers are not optimally located to give a compre-hensive indication of demand from all areas, the MINDparameter can be set to zero, i.e.. no demand isnecessary to run the heating. This will mean that theheating will run, controlling to the heating setpoint, forthe whole of the Occupation period. Alternatively,Parameters in the Zone Controllers may be set toachieve a similar result while minimising the overheatingeffect that may otherwise occur (see Zone ControllerData Sheet for further details).Pumps are started as each Boiler is fired or if only onepump is present, when either Boiler is fired,(parameterNPMP sets the number of Primary Pumps) and continueto run-on after the Boiler(s) have shut down.The BRONparameter sets the run-on time for the pumps.

When Heating or DHW is demanding heat, theappropriate valve opens before any boilers or pumpsrun, to ensure an open hydraulic path for the water.When demand reduces to zero, the valve stays open forthe run-on time of the pump(s). If Actuator Controllers are used in the heating system tocontrol multiple On/Off Zone valves, the MODEparameter should be set to 1; this will ensure that atleast one Zone valve will be fully open during a period ofdemand or run-on.

Maintenance modeIn Maintenance mode, the Boiler Controller simulates a50% demand signal from Zone Controllers, so theheating will control to the Weather Compensatedsetpoint. DHW will control to its normal Occupiedsetpoint. This is useful for commissioning during thesummer months, when no heating demand exists.The Controller is put into Maintenance Mode by holdingdown the Override button until the status light flashesrapidly; the Controller will stay in this mode until thebutton is pressed again.Heating Valve - setting the minim um-on timeThe Heating valve output will automatically switch into aTime-Proportioning mode of operation if the PrimaryFlow Temperature is much higher than the heatingsetpoint. This may occur when heating demands arerelatively small, resulting in a low heating setpoint, butan internal demand for DHW exists, which will drive thePrimary Setpoint to a high value. In order to maintain anaverage heating flow temperature which is approximate-ly the same as the heating setpoint, the heating valvewill open and close (or, if a pump, will turn on and off)on a Time-Proportioning basis. To prevent damage to the valve or pump from excessivecycling,the Minimum-On time of the Heating output is setby the PERD parameter or alternatively can be set usingthe SELECT pushbutton.Hold down the Select Button until the Temperature lampflashes red slowly; the Heating output relay will nowenergise. Wait until the valve or pump has beenenergised for the desired Minimum-On time beforeproceeding, the relay will stay energised indefinitely,(until the button is pressed again - this gives anopportunity to correct any faulty wiring).Now press and release the Select button; the lamp willnow stop flashing, and the relay will de-energise. TheMinimum-On time will have been stored (in non-volatilememory-unaffected by powering-down the Controller).

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Detailed Features

Weather Compensation and TrimThe Boiler Controller runs the Boiler Plant on the basisof demand signals that it receives from otherSeaChange Controllers. For the heating circuit, thedemand is received from one or more Zone Controllers,which provide Optimum Stop/Start control of theoccupied space.

The Boiler Controller controls water temperature for theVT circuit according to a Weather Compensatedsetpoint; this is further modified by demand signals fromthe Zone Controllers to produce the Heating setpoint.Any Zone or Slave Zone Controllers which areregistered to the Boiler Controller for the purposes ofHeating Demand (i.e. their HTSC parameter is set to

point to the Boiler Controller) will be used in thecalculation.Zone Controllers produce demand signals varyingbetween -100% (full cooling) and +100% (full heating).The Boiler Controller adapts the Weather Compensationto “learn” the building’s characteristic by keeping thehighest-demanding Zone device at a +50% demandlevel during occupancy.

Trim and AdaptionIf the demand level isabove or below 50%,the WeatherCompensated setpointis modified by twoeffects in the FuzzyLogic Control loop; thetrim effect will rapidlyraise or lower thesetpoint to take care ofshort-term changes inload.The adaptive effect willadditionally raise orlower the setpoint if the“error” from the 50%level is sustained over along period, whichrepresents the controlsystem “learning” thethermal characteristic of

the building. The effects of these adaptations can be limited; themaximum excursion from the Weather Compensatedsetpoint caused by the effects can be set on two Config-uration Parameters: TRNG sets the maximum trimeffect, and CRNG sets the maximum influence of theadaptive effect.

Other Parameter sMXVT is a limit toheating flowtemperature, and alsodefines the WeatherCompensated setpoint at0 degC Outsidetemperature.FLAV defines anotherpoint on theCompensator curve (at10 degC OutsideTemperature).SMRT is the OutsideTemperature beyondwhich the Heating will beprevented from running.

SeaChange Data Sheet B3 Part No LIT / DAT / BLR / 003 Iss 3.0 Feb 98 Page 6 of 12

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Detailed Features

SeaChange Data Sheet B1 Part No LIT / DAT / BLR / 001 Iss 3.0 Feb 98 Page 5 of 8

Boost ModeWhen any of the participating Zones are more than 1.5degC below their setpoint, they will drive the Heatingsetpoint into a Boost condition; it will temporarily leavethe Compensation Curve with its adapation, and be setto the maximum permissable temperature, MXVT. Onlywhen all Zones are within 1.5 deg C of their respectivesetpoints will the Heating setpoint return to the adaptedCompensation curve. This is done in order to performthe fastest possible Optimum Start, and also to providea predictable heat input to the Zone in order that theZone Controller’s Optimum Start self-adaption will workproperly.It is possible to disable the Boost feature; this may benecessary if none of the participating Zones are readinga representative temperature (for instance, a Hotelheating system where it is impractical to put sensing inall of the rooms, and a simple Weather Compensatedscheme will suffice). In this case, ZBST may beadjusted to disable Boost. Be aware that doing this willalmost certainly disrupt the Optimum Start abilities ofthe system.

Frost and F abric Pr otectionFrost Protection is arranged as a 3-Stage sequence,which operates from a Frost Protection setpoint relatingto Outside Air Temperature.Stage 1 is invoked if the Outside Temperature fallsbelow the Frost Protection setpoint. The heating valvewill open and the primary pump will run for 10 minsevery hour.Stage 2 is invoked as temperature in the primary circuitor the DHW Calorifier falls close to the Frost Protectionsetpoint. The primary pump now runs continuously, theheating valve will open, and the DHW valve will open ifthe DHW temperature is low.Stage 3 is invoked as the temperature in the primarycircuit or DHW Calorifier reaches the Frost Protectionsetpoint. The Boilers will now fire,until all water tempera-tures reach 35 degC.Disab ling Fr ost Pr otectionStages 1&2 Frost protection may be disabled; this maybe useful in a Domestic installation, where the noise ofpumps running during the night is intrusive, andpipework is all contained in occupied parts of thebuilding, and is hence unlikely to freeze. The procedureis deliberately made complex, in order to avoidinadvertant use:Access the FRST parameter, and reduce it to its lowestallowable setting of 2°C. Now put the Boiler Controllerinto Maintenance Mode and temporarily “short” theOutside Sensor connection using a wire shorting link.Refresh the FRST variable (by pressing Select on theZone Controller); it will now display as 0°C, this valuecan now be “written” (i.e. pressing the Override buttonon the Zone Controller) to the Boiler Controller. Take the Boiler Controller out of Maintenance Modeand remove the shorting link, confirm the FRST settingis 0°C, the variable is now fixed at 0°C and cannot be

adjusted by normal methods.To re-enable frost protection, select the 'FRST' variableand put the Boiler Controller into Maintenance Mode.Press the Override button on the Zone Controller ( to“write” the parameter to the Boiler Controller); the'FRST' variable will default back to 2°C. Take the BoilerController out of manual operation, the 'FRST' variablecan now be set as normal to any permissible value.

Fabric Pr otectionFabric Protection is an independent process operatingin Zone and Slave Zone Controllers, with the purpose ofprotecting the building fabric against damage due tocondensation. If the temperature in the space fallsbelow the Non-Occupied setpoint (usually set to 10degC) the Zone Controller will send a demand signal tothe Boiler Controller, which will start the plant in theusual manner.

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System Housekeeping FunctionsIn a conventional Wet Heating environment, the BoilerController performs several important housekeepingfunctions for the rest of the system. Firstly, it contains the real-time clock, which broadcaststime-of-day and day-of-week information to anymodules that may need it. The clock may be set fromany Zone Controller, and the time information is backedup by a Capacitor, which means that the correct time isretained for a minimum of 8 hours in the event of powerfailure (providing that power has been applied for atleast 1 hour).Secondly, it broadcasts Outside Temperature to anyother modules that may need it; it acquires thetemperature either from a sensor directly connected toits input terminals 11 and 12, or from a NetworkedOutside Temperature Sensor. In the absence of bothsensors, it will transmit a default value of 0.1 degClower than the Frost Setpoint (FRST).Thirdly, it performs an important role in the uniqueSeaChange Registration process; it is responsible forthe automatic allocation of system addresses duringregistration. It also keeps track of all RegisteredControllers, so that if one of them fails, a replacementwill be automatically allocated with an address. Thisautomatic feature may prove troublesome when com-missioning large sutes, so it can be disabled usingparameter RPLN. When Commissioning is complete,the automatic mode can be re-instated. For furtherdetails, see our Commissioning Guide document.

Secondar y Boiler s - no HousekeepingIn systems having 2 or more independent sets ofboilers, (e.g. Campus installations with multiple BoilerHouses) Secondary Boiler Controllers must be used.Secondary Boiler Controllers are supplied with theSystem Housekeeping Functions disabled, to avoidconflicts with the Boiler Controller. Thus, in a systemwith 3 independent boiler plants, we would use 1 BoilerController and 2 Secondary Boiler Controllers.

DHW Times and run-on f eatureThe operating times for the internal DHW Control is setby the Zone Controllers registered to the BoilerController. If any of the registered Zones are inOccupancy, the DHW control will be enabled.Sometimes it is useful to be able to extend the DHWoperating times beyond the normal Zone times (forinstance, if cleaners require hot water out of hours).The parameter HWRO may be used to make the DHWrun-on after the last Zone has finished its Occupiedperiod.

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SeaChange Data Sheet B3 Part No LIT / DAT / BLR / 003 Iss4.0 Feb 98 Page 9 of 12

Monitoring ParametersLabel

INPAINPBBLRABLRBPMPAPMPBHTOPHWOPAUTOOVRDSHOF

ZBST

RPLN

SERVCGSTFLOWRTRNHWTPOUTSFLSPBLOPHWOPZDMDMAXFMINRHWSP

DoorwayCode

I1 (C30)I2 (C31)I3 (C32)I4 (C33)I5 (C34)I6 (C35)I7 (C36)I8 (C37)

W1 (C38)W2 (C39)W3 (C40)

W4 (C41)

W6 (C43)

W7 (C44)W8 (C45)S1* (C50)S2* (C51)S3** (C52)S4** (C53)S5 (C54)S6 (C55)S7 (C56)S8 (C57)K1 (C60)K2 (C61)K3..(C62)

Description

Input ‘a’ status (1= contact closed)Input ‘b’ status (1= contact closed)Boiler 1 output relay statusBoiler 2 output relay statusPrimary Pump A relay statusPrimary Pump B relay statusHeating output relay statusHot water output statusAutomatic, control mode (used with W2)Override (used with W1 in Doorway On/Off/Auto dialog box)Summer Heating inhibit in operation (read - only parameter)

1 = Heating DisabledZone Boost Disable;

heating setpoint obeys compensation curve at all times, no boost for optimum start (may adversely affect optimum start)0: = Zone Boost disabled

Replace Nodes;1: Missing Controllers automatically replaced in database if replacement Controller is fitted and registered0: Missing Controllers left as gaps in database if new Controller is fitted and registered (new Controller will receive next available address

Generate Service Pin Message (SeaChange use only)Configuration mode statusBoiler Flow TemperatureBoiler Return TemperatureDHW TemperatureOutside TemperatureCurrent Primary Flow SetpointBoiler control output to sequencerDHW demand levelCurrent Zone demand for heating circuitMaximum Flow Temperature Minimum Return Temperature Domestic Hot Water Setpoint

Units

Off/On Off/On Off/OnOff/OnOff/OnOff/OnOff/OnOff/OnOff/OnOff/On

-

Off/On

Off/On

Off/OnOff/OnDeg CDeg CDeg CDeg CDeg C

%%%

Deg CDeg CDeg C

DefaultValue

--------1-

1

1

0---------

804055

Range

0 - 10 - 10 - 10 - 10 - 10 - 10 - 10 - 10 - 10 - 10 - 1

0 / 1

0 / 10 / 1

0 - 1100 - 1100 - 1100 - 1100 - 1100 - 1000 - 1000 - 100

30 - 11010 - 5010 - 80

Detailed Features

Accessing Configuration andMonitoring P arameter sConfiguration Parameters are used to adjust settingsfrom their factory defaults; Monitoring Parameters areused to monitor internal readings (such as temperaturereadings) during the Commissioning process.The Parameters may be viewed, and in the case ofConfiguration Parameters, adjusted by one of twomethods; Either by using a Zone Controller connectedto the network, or by using the SeaChange DoorwaySupervisor.Using the Zone Controller:a) The Zone Controller must be connected to thenetwork and registered (see Commissioning Guide forfurther details).b) Put the Zone Controller into Configuration Mode bydepressing Select and Override buttons for 10 seconds,until the CNFG legend appears on the display.c) Press Select button on the target device (in this case,the Boiler Controller).d) Hold down Select button on the Zone Controller, and

rotate the rotary knob:clockwise to view Monitoring Parametersanticlock to view Configuration Parameters

e) When desired Configuration Parameter appears,release Select, hold down Override and turn knob toadjust the parameter (Monitoring Parameters cannot beadjusted).Using SeaChange Doorway:Data Points may be added to a Doorway page toaccess/adjust any Configuration or MonitoringParameter. Graphs of certain Parameters are alsoavailable. The code used to access a Boiler Controller isHn (or Bn),where n is the Boiler’s Heat Source number.The code for each parameter is shown in the adjacenttables.Further details of how to set up Doorway pages may befound in the SeaChange Doorway Manual, or in theonline help facility supplied with SeaChange Doorway The PC running SeaChange Doorway can be connectedlocally via a Serial Adaptor Module, or remotely usingstandard High-Speed Modems; all Parameters can thusbe monitored and adjusted remotely.

* indicates 96 minute graph available ** indicates 24 hour graph available

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SeaChange Data Sheet B3 Part No LIT / DAT / BLR / 003 Iss 4.0 Feb 98 Page 10 of 12

Configuration ParametersLabel

HWSPFRSTMAXFMINRFLAVSACT

BLRSNPMPMXVTHWRO

DHWP

MINBRONPERDTRNGCRNGMODE

BLOKAREM

SMRT

MIND

COMPALRM

ALST

NOALGENAGENBLOKALOKBFREZSTOP

DoorwayCode

C1 (or K3)C2

C3 (or K1)C4 (or K2)

C5C6

C7C8C9

C10

C11

C12C13C14C15C16C17

C18C19

C20

C21

C90C91C92C93C94C95C96

Description

DHW SetpointFrost protection setpointMaximum boiler flow temperatureMinimum return temperatureFlow setpoint for 10 °C outside temperature:Sensor Action:

modifies sensor selection for boiler temperature control0: uses flow if fitted, or return if fitted, or average if both fitted.1: uses flow sensor 2: uses return sensor3: uses average of flow and return

Number of boilers in sequenceNumber of Primary PumpsMaximum Heating circuit temperatureDomestic Hot Water Run-On:

length of Occupancy extension for DHW past normal Zone Occupation times

Domestic Hot water Priority:0: Hot Water and Heating have equal priority1: Hot Water has priority; Heating valve will close when DHW is demanding heat

Minimum boiler run timePrimary pump run on timeHeating Valve Minimum-On Time (in tens of seconds)Maximum trim effect on heating setpoint (immediate effect)Maximum adaptive effect on heating setpoint (learning effect)Mode select:

controls operation of zone trim0: actuator demands match zone heat demand1: highest zone sets actuator demand 100% other zones ratiodependent on their demand. All actuators opened while boiler pumps run on.

Number of Boiler stages available to run (i.e.. not locked out )All Boilers remote:

when lockout signals are required for all boilers via Cascade Modules (alarm inputs on Boiler used for other signals)0: on-board relay outputs are part of the boiler sequence1: only outputs from Cascade modules are used in the sequence; Boiler on-board relays are not used

Summer heating inhibit Temperature; heating inhibited if Outside Temperature rises above this level

Minimum Demand for heating to run0: heating runs to heating setpoint for Occupation period

Compensator effect ; SeaChange diagnostic use only Alarm Mode;

0: No Alarms generated, no control action on event1: No Alarms generated, but disable boiler on event2: Generate LOKA/B Lockout Alarm and disable boiler

on fault3: Generate GENA/B General Alarm but do not disable boiler

on fault4: Generate STOP alarm if input ‘a’ in alarm condition

(input ‘b’ operates as General alarm)Alarm State;

Defines state of Volt-free contacts applied to inputs ‘a’ & ‘b’0: Open Circuit on contacts indicates Alarm1: Closed circuit on contacts indicates Alarm

Alarm Parameters; Read-Only,Accesible only via Doorway Supervisor:

No Alarms in this Controller currently (1 = No Alarms)General Alarm Channel ‘a’ (1 = Alarm current) General Alarm Channel ‘b’ (1 = Alarm current)Lockout Alarm Channel ‘a’ (1 = Alarm current)Lockout Alarm Channel ‘b’ (1 = Alarm current)Danger of Freezing Alarm (1 = Alarm current)System Stop Alarm (1 = Alarm current)

Units

Deg CDeg CDeg CDeg CDeg C

-

--

Deg Chrs

-

MinsMins

Secs/10Deg CDeg C

-

---

DegC

%

--

-

-------

DefaultValue

553

8040501

22

600

0

51

18 (180s)10100

R/O0

18

1

R/O0

1

R/OR/OR/OR/OR/OR/OR/O

Range

25 - 65*2 - 15

30 - 11010 - 5020 - 80

0 - 3

1 - 81 - 2

20 - 1000 - 12

0 - 1

1 - 200 - 302 - 600 - 300 - 200 - 1

0 - 80 - 1

10 - 30

0 - 10

-50 / +500 - 4

0 - 1

0 - 10 - 10 - 10 - 10 - 10 - 10 - 1

* see “Disabling Frost Protection”

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SeaChange Data Sheet B3 Part No LIT / DAT / BLR / 003 Iss 4.0 Sept. 98 Page 12 of 12

ElectricalInputs 4 Thermistor sensors

2 Volt-Free ContactsOutputs 6 Relay Outputs N/O contacts

3 A 250 V resistive LoadConsumption 13mA from network

50mA from 24V AC aux supply(or System PSU)

PhysicalWeight 0.25 KGCover Material PC/ABS alloy Self extinguishing to

UL 94 V0/1.60Base Material Polyamide 6.6 Self extinguishing to

UL 94 VOColour Dark Grey to Pantone 425

Specification

Options and Pr oduct Codes

BLR / DIN / DHW / 001 Boiler Controller, DIN rail mounting, controlling 1 or 2 Boilerswith duty rotation , 1 or 2 Primary Pumps,Heating and DHW On/Off Valves, with System Housekeeping

BLR / DIN / STD / 003 Boiler Controller, DIN rail mounting, controlling 1 or 2 Boilerswith fixed sequence, 1 or 2 Primary Pumps, Heating and DHW On/Off Valves, with System Housekeeping

BLR / DIN / STD / 004 Secondary Boiler Controller, as /001, but controlling a second or subsequent independent set of boilers with duty rotation, no System Housekeeping

BLR / DIN / STD / 006 Secondary Boiler Controller, as /003, but controlling a second or subsequent independent set of boilers with fixed sequence, no System Housekeeping

all dimensions in mm

Conformant product

Wiring Inf ormation

Dimensions

8 Horsted Square Bell Lane Business Park Uckfield East Sussex TN22 1QQ

phone 01825 769812 fax 01825 769813e-mail sales@seachange.co.ukhttp:// www.seachange.co.uk

BB33