Read this First! - CHP | Energy for everythingglenergy.ie/wp-content/uploads/2016/10/Dachs_Mini-CHP... · 2017. 1. 28. · ER G83/2 Each Dachs is type-tested with integrated grid

Dachs 5.5 Mini-CHP unit

_______________________________

Brief Instructions

for UK installations _______________________________

Read this First! _______________________________

These brief instructions are intended to provide a guide to the correct

installation of the Dachs mini-CHP and associated equipment.

They must be read in conjunction with the full SenerTec Instruction

manual which is packed in the Accessories box.

Remember to fix the Floor Location Plate to the floor before

positioning the Dachs – it’s packed in the Accessories box.

If in doubt, ask (tel. 08450 701075) 2

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CONTENTS

1. Very Important Information .......................................................................... 3

2. Electricity Distribution Network Operators ................................................. 5

3. Application Procedure for Connecting Dachs to the Electricity Grid ....... 6

4. Delivery and Offloading ................................................................................ 7

5. Lifting and Moving the Dachs ...................................................................... 8

6. Scope of Supply ............................................................................................ 9

7. Planning the Installation Space ................................................................. 10

8. Installing the Floor Location Plate ............................................................. 14

9. Positioning the Dachs ................................................................................. 15

10. Levelling the Dachs ..................................................................................... 16

11. Buffer Vessel ............................................................................................... 17

12. Thermostatic Pump ..................................................................................... 20

13. Typical Hydraulic Schematics .................................................................... 21

14. Exhaust Gas Condenser ............................................................................. 22

15. Ventilation and Flues .................................................................................. 24

16. Connecting the Gas Supply ....................................................................... 31

17. MSR2 Controller .......................................................................................... 33

18. Electrical & Power Connections ................................................................ 34

19. External controls / BMS connections ........................................................ 38

20. Modems ........................................................................................................ 41

21. Labelling ...................................................................................................... 42

22. Installation Pre-commissioning Checklist ................................................ 43

23. Fault Identification & Reporting ................................................................. 44


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1. Very Important Information

Standby generators

The Dachs cannot operate in island mode (off-grid) and will not operate as an emergency standby generator. Under any Loss of Mains (LOM) conditions, the Dachs will immediately disengage elec-trically from the grid.

If a separate emergency standby generator is connected to the same circuits as the Dachs, a hard-wired interlock must be installed between the Dachs and the generator to prevent the Dachs re-starting with the generator.

Additional SSEGs on the same system as the Dachs

If additional SSEGs, eg. solar PV, are connected to the same circuits as the Dachs, the combined connected load might exceed that allowed under the G83 Engineering Recommendation. In this case, advice should be sought from Baxi-SenerTec UK and the Distribution Network Opera-tor before installing the Dachs. Power Factor Correction

Please be aware that the Dachs incorporates a grid connected, asynchronous generator and this may influence the building’s Power Factor.

Power Factor is a measure of how efficiently electrical power is consumed. In the ideal world Pow-er Factor would be unity (1.0), but in practice a building’s PF can be reduced to as low as 0.7 by highly inductive loads such as lightly loaded electric motors, luminaire transformers, fluorescent lighting ballasts and welding sets.

Capacitive Power Factor Correction (PFC) is applied to electric circuits as a means of minimising the inductive component of the current and thereby reducing the losses in the supply.

The application of Power Factor Correction capacitors is a widely recognised method of reducing an electrical load, thus minimising wasted energy and hence improving the electrical consumption and efficiency of an installation. It is not usually necessary to reach unity, ie Power Factor 1.0, since most supply companies will tolerate a PF of 0.95 to 0.98.

By installing suitably sized switched capacitors into the circuit, the PF will be improved and it would be advisable to seek advice if you consider that Power Factor Correction will need to be applied to your building.

Dachs enclosure

The Dachs enclosure panels are both thermally and acoustically rated and must not be drilled or modified in any way. The panels are removable and therefore no services or equipment should be attached to them.

Service connections

No equipment or services must be fixed to the Dachs panels and all service connections must be flexible (flexible hydraulic F&R hoses, and a gas supply hose are supplied).

Electrical cable connections to the MSR2 controller must be flexible and enter the enclosure only through the cable entries provided.


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Clearance

The recommended clearance spaces around and above the Dachs equipment must be clear of all cables, pipework, etc. and are the minimum required to allow the installation to be commissioned (see Section 5). If the minimum space is not available please contact Baxi-SenerTec for advice before proceeding with the installation.

Water quality

Before the Dachs is put into operation for the first time, the quality of the heating system water must be checked to ensure that it complies with acceptable standards. Please contact us or refer to the SenerTec installation instructions for a detailed specification of the water quality requirements.

Regulations and standards

The Dachs must be installed according to all relevant and current British Standards, Codes of Prac-tice, current Building Regulations, and Gas and Electrical safety regulations, as well as any special regional requirements of Local Authorities and Insurance Companies.

These instructions have been prepared specifically for UK installations.


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2. Electricity Distribution Network Operators

Distribution Network Operators (DNOs)

The DNOs own the public electricity network and their permission may be required before connect-ing Small Scale Embedded Generators (SSEGs), such as Combined Heat & Power, to the grid.

Guidance on the application procedure and application forms are available on each DNO’s website.

Energy Networks Association

The DNO connection process is governed by the Engineering Recommendations (ER) published by the Energy Networks Association (ENA).

Copies of the Engineering Recommendations are available on the ENA website - www.energynetworks.org


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3. Application Procedure for Connecting Dachs to the Electricity Grid

IT IS THE RESPONSIBILITY OF THE INSTALLER TO SUBMIT THE G83/2 OR G59/3 CONNEC-TION APPLICATION TO THE RELEVANT DISTRIBUTION NETWORK OPERATOR (DNO).

BAXI-SENERTEC UK CAN PROVIDE ASSISTANCE WITH THIS PROCESS – PLEASE CON-TACT US FOR DETAILS.

ER G83/2

Each Dachs is type-tested with integrated grid protection which complies with the G83/2 Engineer-ing Recommendation. This specifies the conditions under which Small Scale Embedded Genera-tors (SSEGs), either singly or aggregated in a single premises, operating at up to and including 16 amps/phase and 11.04 kW, 3-phase, can be installed and operated.

a) Single Dachs installation

A single Dachs can be installed and commissioned under the G83/2 ER without permission from the Distribution Network Operator.

b) 2-Dachs Multi-module installation

A 2-Dachs Multi-module system operating at its rated output can be installed and commissioned under the G83/2 ER without permission from the Distribution Network Operator. However, it is rec-ommended that the DNO is consulted prior to installation.

ER G59/3

The G59/3 ER governs the connection of a generator installation of more than 11.04 kWe and less than 50 kWe, 3-phase, to the distribution network.

c) 3-Dachs (or more) Multi-module installation

An installation consisting of 3 or more Dachs units (max. 9 units) must be connected under the G59/3 ER, and permission from the DNO to connect is required before installation can proceed.

A separate wall-mounted G59/3 grid protection relay panel must be installed between the Dachs CHP installation and the electricity network. This panel is available as an extra cost item from Baxi-SenerTec UK, or can be provided by others.

Notification of completed commissioning

It is the responsibility of the installer to inform the DNO no later than 30 days after commissioning that the CHP installation has been satisfactorily commissioned.


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4. Delivery and Offloading

Please observe safe practice and the SenerTec handling instructions at all times.

The following are the principal items of equipment that will be delivered (excl. flue kits, pumps, etc.)

Dachs & Accessories

Pallet 1100 mm x 750 mm

Weight 550 kg

The Dachs is delivered on a pallet which is tied to the Dachs by straps. The support feet of the Dachs are located in special recesses on the pallet.

The total delivered weight is 550 kg and the centre of gravity is roughly in the middle of the pallet.

The MSR2 Controller unit is packed in a card-board box on top of the Dachs, along with the separate Accessories box.

Buffer Vessel

Pallet

1000 mm x 1800 mm

Weight 180 kg

Condenser

Box

400 mm x 1900 mm

Weight 25 kg


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5. Lifting and Moving the Dachs

a) Dachs transport / lifting wheels

b) Pallet truck

c) Crane

If possible, leave the Dachs in its packag-ing and on the pallet whilst moving it into the plant room.

To prevent damage to the adjustable feet and base frame, the special transport/lifting wheels should ideally be used for moving and positioning the Dachs.

If wheels have not been provided, please contact your supplier before proceeding.

A set of wheels consists of two separate frames, one for each side of the unit - these wheels are only suitable for use on level, solid surfaces.

Note that the Dachs weighs 530 kg

Two slings are required and must be passed around the Dachs as shown to prevent the equipment from slipping out. Take care to route the sling to avoid damaging the gas valve train, as shown by the detail.

Important Damage to feet or base frame will prevent commissioning.


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6. Scope of Supply

A typical single-Dachs installation will consist of the following items of equipment:-

• Dachs mini-CHP unit c/w MSR2 controller and flexible F&R and gas connections

• Exhaust gas condenser c/w plastic flue kit (for internal plantroom use only)

• Fully insulated 750 litre buffer vessel (direct)

• Thermostatic pump

Note - up to 3 Dachs units can connect to a single 750 litre buffer tank

Additional accessories include:-

• Additional internal plastic flue components – see Section 15.

• External flue terminals for single Dachs - see Section 15.

• External vertical twin-wall flue system for single Dachs - see Section 15.

• Analogue, Ethernet or GSM modem for remote monitoring (required for Planned Mainte-nance Contract) – see Section 20.


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7. Planning the Installation Space

The Dachs must be positioned with the minimum clearance space around and above the equip-ment as shown in the following layouts.

The space within the ‘Clearance Cage’ must be clear of all materials and equipment to permit re-moval of the enclosure panels for maintenance access to the engine.

If these clearances are not available, please contact Baxi-SenerTec for advice before proceeding with the installation.

The Dachs can be installed on a level concrete floor without any plinth or special base.

1750 mm condenser height

Important min. 500 mm clearance is required above condenser

Front 600

Rear 350

Dachs ‘Clearance Cage’

Important Insufficient clearances will prevent commissioning.

1900 for Dachs only

1060

720

Side 600

Side 600

2250 for Dachs + condenser

for Dachs


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Clearances – 1 Dachs with Buffer Vessel

a) Buffer vessel on RHS (preferred layout)

b) Buffer vessel on LHS



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8. Installing the Floor Location Plate

The floor location plate (1) and the fixing bolts (2) are packed in the accessories box.

Fix the floor location plate to the floor in the position shown and locate the rear feet of the Dachs in the circular cut-outs in the plate.

Floor location plate

Min. 350 mm. from back wall

40

Important Commissioning will not proceed if the Floor Location Plate is not fitted.


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9. Positioning the Dachs

Move the Dachs into position using the transport / lifting wheels

To prevent damage to the adjustable feet and base frame, it is important that only the Dachs transport / lifting wheels are used to move and position the Dachs on the floor location plate.

If wheels have not been provided, please contact your supplier before proceeding.

Important Move the Dachs correctly - damage to feet or base frame will prevent commissioning.


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10. Levelling the Dachs

Remove the cardboard carton – do not damage or discard it; you will need it to protect the Dachs during the rest of the construction process.

Remove the soundproof enclosure panels by turning the quick-release fasteners through 90o with a

suitable screwdriver or a coin so that the slot is at right angles to the edge of the panel.

Remove the panels in the following sequence:

1. Top

2. Front

3. Sides

It is not necessary to remove the rear panel at this stage.

Place a spirit level on the front and side edg-es of the floor sump.

Make sure that the spirit level is not resting on the raised edge protection of the sump.

Align the Dachs horizontally by turning the levelling feet with a long (>150 mm.) 13 mm. open spanner.

Replace the enclosure panels in the reverse order and press in the quick-release fasteners by hand (it isn’t necessary to use a tool to turn them – they should automatically return to the locking position).


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11. Buffer Vessel

Before final positioning, place the supplied thermal insulation pad under the vessel inside the base ring, as shown on the illus-tration.

The insulation pad is approx. 640 mm. diam. and will be found packed in the

top of the buffer vessel on delivery.

The buffer vessel can be installed on the right or left hand side of the Dachs on a level concrete floor without any plinth or special base.

The accessories are designed to allow both installation options. To enable the standard accessories to be used, the layout with the buffer vessel on the right hand side should be used.

The specified clearances shown in Figures 5-1 and 5-2 must be maintained.

Also place the narrow insulation strip around the buffer base.


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To fit the temperature sensors to the buffer vessel, first remove the buffer insulation by pressing the lower part of the hook strip and pulling on the upper part to separate them.

Run the sensor cables up-wards and place the 9-pin connector on the top insula-tion.

Attached the wiring harness and run it back to the MSR2 controller before refitting the insulation and the buffer lid.

Insert the sensors into the correct clips using a screwdriver to raise each clip.


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SE750 Buffer vessel connection positions & sizes

SE750 Buffer Vessel

The SE750 is a direct buffer vessel without internal hydraulic separation, and has a maximum working pressure of 3 bars.

Dimensions (with insulation) - 1920 mm. high x 950 mm. diam.

Dimensions (delivered) - 1920 mm. high x 750 mm. diam.

Tilted height (diagonal) - 1850 mm.

Min. floor/ceiling height - 2000 mm.

Pipework sizing

For Dachs units installed in close proximity to the buffer vessel with direct pipework runs, a 1” common return is generally acceptable.

If the length of pipework and number of fittings between the buffer vessel and the Dachs are ex-cessive, it is recommended to increase the diameter of the common return pipework to compen-sate for the additional resistance.

Heating system flow connection -11/2”

No.1 Dachs flow connection -1”

No.2 Dachs flow connection -11/2”

Heating system return connection -11/2” Drain connection -1”

No.3 Dachs flow connection -1”

Dachs common return connection -1”

Air vent - 1/2”


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12. Thermostatic Pump

The SenerTec Thermostatic pump is suitable for:-

a) common flow from 2 or 3 Dachs units to a buffer vessel.

Note - a thermostatic pump is not required where there is an individual flow from each Dachs to the buffer vessel with an external resistance less than 20 mbar.

b) the flow outlet from a buffer vessel to the heating system where either 1 or 2 Dachs are in-stalled.

Note - the Thermostatic pump is not suitable for the outlet from the buffer when 3 or more Dachs are connected; in this case the pump should be supplied by others.

An integral thermostat in the pump regulates the flow by means of differential pressure to reduce running costs during partial load operation.

Please follow the instructions supplied with the Thermostatic pump to ensure correct installation, particularly :-

• Installing the thermostat

• Selecting the flow / pressure settings

We recommend that the electrical supply and control connections to the Thermostatic pump are from the BMS.


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13. Typical Hydraulic Schematics

Note 1 - the primary return to the CHP buffer vessel should always be taken from the lowest tem-perature location in the heating system.

Single Dachs

2 Dachs Multi-module

3 Dachs Multi-module


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14. Exhaust Gas Condenser

Install the exhaust gas condenser in the position shown using the fittings provided to connect to the Dachs and the buffer vessel.

Please refer to SenerTec Assembly & Commissioning booklet - Sections 6 & 7 - for detailed in-structions for hydraulic connections between the Dachs, Condenser and Buffer vessel.

Water pipe

Exhaust pipe

Fitting the Condenser to the Dachs

• Position the Exhaust Gas Condenser to the right rear of the Dachs.

• Screw the insulated exhaust pipe into the top connection of the condenser.

• Connect the water pipe between the Dachs and the condenser

• Stabilise the condenser in position by means of the adjustable feet.


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Fitting the Exhaust Bellows

• Detach the protective shield from the ex-haust pipe and place it over the Dachs ex-haust coupling.

• Place the bellows between the Dachs ex-haust pipe coupling and the reducer.

• Clamp the bellows with the jubilee hose clips to ensure gas-tight seals.

Important

Correct, stress-free fitting of the bellows is vital - when correctly installed, the bellows will be neither stretched nor compressed.

Protective shield

Exhaust pipe reducer

Finally, fix the protective shield in position as shown

Protective shield

Bellows

Exhaust pipe to condenser

Jubilee clip

Jubilee clip

Bellows


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15. Ventilation and Flues

Plant room ventilation

Openings with a minimum free area of 150 sq.cm. for the supply of ventilation and combustion air into the Dachs plant room must be provided.

The size, design, and position of the ventilation openings must comply with BS6644:2011

Flues

The CHP flue must be installed in accordance with the latest edition of IGE/UP/3 which specifies the requirements for the exhaust system associated with Gas Fuelled Spark Ignition Engines.

• Any exhaust flue system must be capable of being visually inspected at every joint, over the total length of the flue installation.

• Special attention must be given to the inspection requirements for flues installed in voids and, if necessary, inspection hatches must be provided to enable inspection to be carried out.

• Any flue system that cannot be adequately inspected would have to be pressure tested and a valid certificate produced before commissioning, and also before every subsequent maintenance or service visit.

• A flue passing through an internal wall or ceiling must be manufactured from a suitable material and comply with BS5440 and the Building Regulations.


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Flue sizing

Dachs Condensing exhaust gas data

Exhaust gas mass flow rate 40.8 kg/h

Exhaust gas temperature 70oC – 90

oC

CO2 emissions 7.5%

CO emissions 25 mg/kWh

NOx emissions 394 mg/kWh

Dachs Condensing plastic flue system

Nominal diameter 80 mm.

Max. overall length (incl. 2 x 87o bends) 22 metres

Max. horizontal length 17 metres

Reduction in total length per additional 87o bend 1 metre

Reduction in total length per additional 45o bend 0.5 metre



An additional cleaning & inspection opening should be fitted after every flue pipe change of direction.

NOTES

• Only SenerTec supplied plastic flue is permitted – plastic flue from other manufacturers may be non-compliant for use with internal combustion engines and would prevent the in-stallation from being commissioned.

• SenerTec single-wall plastic flue must only be installed within the Dachs plant room.

• Plastic flue must be supported securely at every joint to prevent any movement that could cause separation of the joints.

• Flues that have to pass through an internal wall or ceiling must be converted to stainless steel before leaving the plant room.

• Horizontal flue runs must be installed with a minimum back-slope of 3o (5 cm/metre) to al-

low condensate drainage (condensate build-up in the flue will cause the CHP engine to stall).


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Internal Condensing Flue Kit

The SenerTec DN80 single wall plastic flue kit is suitable for installation within the Dachs plant room only.

• If the flue is routed directly to outside through a wall or roof, a range of suitable terminals is available.

• The plastic flue must be supported securely at every joint to prevent any movement that could cause separation of the joints. Horizontal flue runs must be installed with a minimum back-slope of 3

o (5 cm/metre).

• The joints must be lubricated using the supplied grease before fitting.

(Note that the internal plastic flue components are supplied in black)


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Internal flue accessories (available separately)

Additional DN80 plastic flue parts are available to add to the supplied internal flue kit, up to the maximum length recommended..

4700-603-010 Flue pipe DN80, Length 500 mm, black

4700-604-010 Flue pipe DN80, Length 1000 mm, black

4700-605-010 Flue pipe D80, Length 1950 mm, black

4700-608-010 45° bend for flue pipe DN80, black

4700-609-010 87° bend for flue pipe DN80, black

4700-611-010 Inspection T-piece DN80, black

4700-668-000 Siphon DN32

4700-619-000 Tube of lubricant for flue duct - 150g

If the flue is routed directly to outside through a wall or roof, a range of External Condensing Flues and Terminals is available.

Otherwise, we recommend that the plastic internal flue is connected to a stainless steel flue system (see example below).


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External Condensing Flues & Terminals

Dachs external condensing flue terminals and terminal kits must be directly connected to a Dachs internal flue system.

Note that the Dachs single wall internal flue system is intended for installation within the Dachs plant room only.

Flue systems must be installed in accord-ance with fire and gas safety regulations.

Horizontal flue runs must be installed with a minimum back-slope of 3

o (5 cm/metre).

The joints must be lubricated using the sup-plied grease before fitting.

The flue must be supported securely at eve-ry joint to prevent any movement that could cause separation of the joints.

Inspection T-piece

Inspection T-piece

Horizontal wall terminal

min. 3o

gradient

Vertical external wall terminal Vertical roof terminals


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External Condensing Flue Terminals (available separately)

4700-645-002

Horizontal wall flue terminal DN80/125, 952 mm. long, grey, incl. wall cover plates.

4700-642-000

Vertical flue roof terminal, DN80/125, black

4700-641-000

Pitched roof flashing, 25°-45°, DN 125, black

4700-646-000

Flat roof flashing, aluminium, DN125

4700-713-000

External vertical twin-wall flue terminal kit 80/125, 1000 high, c/w brackets, white, for external wall installation, consisting of:-

- straight lengths - 1 x 500 mm., 1 x 1000 mm. - 2 x flue pipe wall coverplates - 1 x 87

o bend

- 1 x vertical flue terminal - 2 x external fixing brackets

External Condensing Flue Accessories (available separately)

4700-703-000 Twin wall flue pipe DN80/125, length 500 mm, white



4700-706-000 Twin wall bend 87°, DN80/125, white

4700-707-000 Twin wall bend 45°, DN80/125, white

4700-711-000 External adjustable wall bracket, 125 mm., white

4700-619-000 Tube of lubricant for flue duct - 150g


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Example of external twin-wall flue pipe DN80/125 & brackets


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16. Connecting the Gas Supply

Natural gas supply pressure

Minimum 20 mbar (static)

Minimum 15 mbar (dynamic)

Maximum 24 mbar

LPG (min. 95% propane) supply pressure

Minimum 40 mbar

Maximum 54 mbar

Recommended positions for gas supply pipe (cm)


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17. MSR2 Controller

Hook the rear of the MSR2 con-troller to the rear panel on the LHS of the Dachs. Open the controller front pael (see below) and secure the controller to the side of the Dachs with the hex screw, as shown.


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18. Electrical & Power Connections

Please refer to SenerTec Assembly & Commissioning booklet - Section 9 - for detailed instructions of electrical and controls connections.

No conduit or trunking must be fixed to the Dachs casing panels.

All cables must be installed to the MSR2 controller prior to commissioning. The final cable connec-tion must be flexible and enter the MSR2 enclosure through the rear cable entries provided.

Isolator

A 4-pole lockable isolator must be installed adjacent to each Dachs and must be clearly labelled in accordance with current electrical wiring regulations.

Dachs connection to public power supply and building networks

4-pole lockable isolator (by in-

staller)

Cable connect to 3 x 20 amp type ‘C’ MCBs (by installer)

Important Any rigid connections onto the MSR2 controller or any fixings on the casing panels will prevent commissioning.


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Electrical mains connections

All electrical installation work must be carried out in accordance with the electrical regulations and the latest edition of BS7671.

• The dedicated mains supply to each Dachs must be via 3 x 20A Type ‘C’ circuit breakers located in the electrical distribution panel (by others).

• The mains supply to the Dachs must be sized according to the 20 A breaker protection and the cable length; however it must have a minimum cross-section of 2.5 mm

2.

• The installer is responsible for connecting the three phases, neutral and earth to the termi-nals inside the Dachs MSR2 controller, as shown below.

• Attach the labels provided to the main distribution panel and also to any sub-distribution panel.

Emergency Stop

The Dachs must be connected to an emergency stop – please refer to the SenerTec ‘Assembly and Commissioning’ instructions for details.

Equipotential Earth Bonding

• Earth bonding clamps are fitted on the Dachs return pipe connection and on the buffer vessel air vent pipe.

• Earth bonding cable (min. 10 mm.) can be run to each Dachs individually, or can be daisy-chained to all the appliances and routed back to a main earthing point.


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19. External controls / BMS connections

Dachs mini-CHP - Control Strategy

Dachs mini-CHP units are designed to operate constantly over long periods in order to generate

low carbon electricity for use in the building.

They are heat-led and will start when the heating system return temperature, which is measured by

its own sensor, is less than 68oC. When the return temperature rises above 73

oC the Dachs will

switch off and remain off until the return temperature falls again to under 68oC.

Being internal combustion engines, CHPs are not suitable for applications where the base heat

load is insufficient to maintain constant running and where frequent on/off cycling could result in

long term engine maintenance issues.

In order to maximise the Dachs running time and prevent on/off switching, there are 2 key condi-

tions that need to be allowed for by the BMS:-

a) the CHP system must be given lead ‘boiler’ status and be given priority to operate under

low heat load conditions ahead of the boilers at all times.

b) The return temperature to the CHP must be kept below 70oC at all times to prevent unnec-

essary engine switch-off.

Lead ‘boiler’


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Control Connections

Each Dachs is fitted with the following contacts for interfacing with an external control system or

BMS:-

• Enable (VF) – all Dachs modules must be enabled simultaneously by the BMS. In a multi-

module installation all Dachs units must be interconnected with the communication cables

supplied. The Dachs internal operational software will sequence the modules and ensure

that they all reach their scheduled service running hours at the same time (note that the

enable contacts must be open to run the Dachs).

• Service Due - gives 300 hours advance warning that an engine service is due. If a service

has not been carried out by the time the running hours are reached, the CHP will automati-

cally switch off to protect the engine.

• Fault – any internal or external fault condition that prevents the engine from operating.

Enable (VF)

Note that the enable contacts must be open to run.


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Service due

Fault


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20. Modems

A choice of modems is available which can be fitted to the Dachs MSR2 controller for remote moni-

toring, data gathering and diagnostics purposes.

• Ethernet modem (Art. No. 4786-472-000) - for connection to a data network (the Dachs will

be allocated an IP address).

• Analogue modem (Art. No. 4795-671-000) - requires an analogue telephone line connec-

tion with a dedicated dial-in number.

• GSM modem (Art. No. 4795-647-000) - c/w cable & magnetic base antenna (operating

speed will depend on network signal strength).

A modem can be fitted and configured at commissioning stage, providing the data cabling or ana-

logue telephone line is installed to the Dachs and is fully operational prior to the commissioning

visit.

In a multi-module installation, it is necessary to install a modem in the Master Dachs only.

Important

Baxi-SenerTec UK will be unable to offer a comprehensive maintenance contract to the end-user if

a modem is not installed and fully operational.


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21. Labelling

To comply with Engineering Recommendation G83, the installer must provide labelling at the Sup-

ply Terminals (Fused Cut-Out), meter position, consumer unit and at all points of isolation within

the User’s premises to indicate the presence of a SSEG. The labelling should be sufficiently robust

and if necessary fixed in place to ensure that it remains legible and secure for the lifetime of the

installation. The Health and Safety (Safety Signs and Signals) Regulations 1996 stipulates that

labels should display the prescribed triangular shape and size, using black on yellow colouring.

A typical label, for both size and content, is shown below:-


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22. Installation Pre-commissioning Checklist

The installation should be installed in accordance with the instructions supplied with the equipment, with this RTF document, and with all necessary regulations and standards.

The following checklist details the minimum requirements that will allow commissioning to proceed - please use this to make sure everything is ready before requesting a commissioning visit.

1 The CHP must be level.

2 The floor location plate must be fixed to the floor under the rear feet of the Dachs.

3 Clearances to front (600mm), side (600mm), & back (350mm) of the Dachs must be provided.

4 If a condenser is fitted, the required minimum vertical clearance must be provided.

5 The plantroom ventilation system must be adequate and comply with regulations.

6 Non-compliant flyscreens / mesh must not be fitted to ventilation openings.

7 If the plantroom is mechanically ventilated, it must be interlocked to the CHP.

8 The MSR control panel must be correctly mounted on the side of the Dachs

9 The external electrical wiring must be installed and connected in accordance with BS7671

10 The CHP must be connected to 3 x 20 amp. type ‘C’ circuit breakers in the distribution panel.

11 Min. 10mm equipotential bonding earth cable must be connected to Dachs and buffer vessel.

12 A 4-pole lockable isolator must be installed adjacent to the CHP and be clearly labelled.

13 A CHP emergency shut-down system must be installed and operational.

14 The flexible gas supply hose c/w integral fire valve as supplied must be installed.

15 The gas supply and heating F&R flexible pipes must be free of kinks and hanging loosely.

16 The gas supply must be tested and purged in accordance with gas safety regulations.

17 The gas test certificate must be available on site, or be sent to Baxi-SenerTec beforehand.

18 The 3 buffer vessel sensors must be correctly fitted (or the return pipe sensor if no buffer).

19 The Thermostatic pump (if supplied) must be correctly installed and electrically connected.

20 The exhaust flue gas system must be correctly installed and bracketed.

21 (Non-condensing only) - the draught diverter must be fitted & exhaust pipe insulated (30mm.)

22 A data network/phone line box must be within 1 metre of Dachs (for modem connection).

23 The heating system water must be treated to conform with recommended requirements.

24 Systems must be operational and a heat load available to run the Dachs for a sufficient time.

25 Where relevant, DNO permission to connect to the electricity network must be confirmed.

To arrange commissioning, please contact us and ask for a Commissioning Request Form which must be completed and returned before commissioning arrangements can be finalised.

Please note that any cancellation or postponement of a prearranged commissioning visit must be notified as soon as possible, but in any event at least 3 days before the arranged dates. If commis-sioning is unable to proceed after arrival at site, Baxi-SenerTec UK will be entitled to leave site and await further instructions. The cost of additional or extended visits due to on-site circumstances outside the control of Baxi-SenerTec UK and its sub-contractors will be fully chargeable.

Following these instructions carefully will save time and avoid aborted visits!


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23. Fault Identification & Reporting To report a fault, call Baxi-SenerTec UK on 08450 701075 and give the following information:-

1. 3-digit code with description of fault.

2. Oh - total number of engine operating hours.

3. Starts - total number of engine starts.

4. Serial number of Dachs – located on top cover & side frame of Dachs


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Fault / Service codes


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Documents

Read this First! - CHP | Energy for everythingglenergy.ie/wp-content/uploads/2016/10/Dachs_Mini-CHP... · 2017. 1. 28. · ER G83/2 Each Dachs is type-tested with integrated grid