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ANDREWS COMBIﬂ o

5

GB

CAUTION

If the water system is not in use for periods exceeding 14 days, there is an increased risk of
corrosion on all copper parts and an increase in bacterial growth. Follow the recognised measures
for Anti-legionella in section 5.4.2. to manage this risk

2.2 REGULATIONS AND STANDARDS

This heater must be installed in accordance with relevant Standard Speciﬁ cations, Codes of Practice and cur-
rent Building Regulations, together with any special regional requirements of the Local Authorities, Gas under-
taking and Insurance Regulations for the Electrical Equipment of Buildings. The installation of this heater must
be in accordance with the relevant requirements of:

•

Health and safety at work act 1974

•

Building regulations 2010

•

Electricity at work regulations 1989

•

Management of health and safety at work regulations 1998

•

Manual handling regulations 1992

•

Model water byelaws 1986

•

BS 7671 - Requirements for electrical installations, IEE wiring, regulations

•

BS 6644 - Speciﬁ cation for the installation of Gas ﬁ red hot water boilers for rated inputs between 70kW
(net) and 1.8 MW

•

BS 7074-2 - Applications selection and Installation of expansion vessels and ancillary equipment for sealed
water systems.

•

BS 6880:1 Code of practice for low temperature hot water heating systems of output greater than 45kW.

•

BS 6880:2 Code of practice for low temperature hot water heating systems of output greater than 45kW.

•

BS 6880:3 Code of practice for low temperature hot water heating systems of output greater than 45kW.

•

CP 342:2 Code of practice for centralised hot water supply. Buildings other than individual dwellings.

•

IM/11 - Flues for commercial and Industrial Gas Fired Boilers and Air Heaters

•

IGE/UP/1 - Soundness Testing and Purging Procedure for Non Domestic Installations

•

IGE/UP/2 - Gas Installation Pipe work, Boosters and Compressors for Industrial and Commercial Premises

•

IGE/UP/10 - Installation of ﬂ ued gas appliances in industrial and commercial premises.

•

IGE/UP/16 - Design for Natural Gas installations on industrial and commercial premises with respect to
hazardous area classiﬁ cation and preparation of risk assessments

CAUTION

These manufacturer’s notes must not be taken in any way as over-riding statutory obligations.

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Содержание COMBIflo 100/300

Страница 1: ...M7889 COMBIﬂo Indirect High Eﬃciency Boiler Stainless Steel Storage Water Heater 100 300 150 300 INSTALLATION OPERATION AND MAINTENANCE MANUAL ...

Страница 2: ...el indoors L WA dB 61 62 Emissions of nitrogen oxides NO X mg k Wh 40 40 Domestic hot water parameters Declared load profile 3XL 3XL Daily electricity consumption Q elec kWh 0 755 0 754 Annual electricity consumption AEC kWh 166 166 Water heating energy efficiency n hw 75 75 Daily fuel consumption Q fuel kWh 60 395 60 748 Annual fuel consumption AFC GJ 48 48 Weekly fuel consumption with smart cont...

Страница 3: ...esign 24 4 8 Secondary return design DHW circulation pump 25 4 9 Condensate disposal 25 4 10 Immersion heater 26 4 11 Mixing valve and actuator control 27 4 12 Flue systems and ventilation 28 4 13 Flue terminal positions 30 4 14 Maximum ﬂue lengths 31 4 15 Gas connections 32 4 16 Electrical connections 33 4 17 AGU2 5 Expansion modules 34 4 18 Web server OZW672 36 4 19 Outside sensor and wired room...

Страница 4: ...nge Common combustion air intake manifold takes air from boiler room type B23 ﬂue or directly from outside via a combined ﬂue system C13 C33 An air control non return ﬂap is integrated into the air supply of each heat engine to ensure that ﬂue products cannot contaminate the air supply when a heat engine is not in operation The safety and operation functions of each heat engine are managed by micr...

Страница 5: ...tric shock Indicates serious danger from electricity to personal safety and life CAUTION Indicates a potentially dangerous situation for the boiler and the environment INFORMATION Suggestions to assist the user in implementing instructions in this guide ADDITIONAL READING Reference to additional information in other documents ...

Страница 6: ...stallation adjustment servicing of this heater must be carried out by a competent person and installed in accordance with current standards and regulations Failure to correctly install or maintain this heater could cause injury to persons or damage to property The manufacturer shall not be held liable for any such injury and or damage DANGER Do not store or use explosive or easily inﬂammable mater...

Страница 7: ...tion of Gas ﬁred hot water boilers for rated inputs between 70kW net and 1 8 MW BS 7074 2 Applications selection and Installation of expansion vessels and ancillary equipment for sealed water systems BS 6880 1 Code of practice for low temperature hot water heating systems of output greater than 45kW BS 6880 2 Code of practice for low temperature hot water heating systems of output greater than 45k...

Страница 8: ...ppliance Appliance GAR Regulation 2016 426 Ecodesign directive for Energy Related Products ERP 2009 125 EC Electro Magnetic Compatibility EMC Directive 2014 30 EU Low Voltage LVD Directive 2014 35 EU Boiler Eﬃciency BED Directive 92 42 EEC KEY 1 Type approval designation 2 Gas type and pressure 3 Model Name 4 Heat gas ﬂow CO data 5 Technical data 6 Serial number and year This manual is an integral...

Страница 9: ...ANDREWS COMBIﬂo 7 GB 3 1 GENERAL DIMENSIONS CONNECTIONS 3 0 TECHNICAL DATA ...

Страница 10: ...Max permitted operating temperature o C 82 82 Flow Return connections BSP 2 2 Low Loss Header resistance kPa 0 5 0 5 HOT WATER Tank capacity litres 300 300 Standby losses Watts 140 170 Recovery rate through 50o C l hr 1 520 2 240 PMS Inlet Operating pressure max min bar 5 5 0 2 5 5 0 2 In Out connections BSP M 11 2 M 11 2 Water return connection BSP M 1 M 1 ELECTRICAL Electrical supply voltage Hz ...

Страница 11: ...Heat engine return B8 Heat engine ﬂ ue B9 Outdoor 1K B10 Low Loss Header ﬂ ow B36 DHW cylinder primary CIRCULATION PUMPS Q1 Heat engine Q2 HC1 Heating Q3 DHW Primary Q6 HC2 Heating Q33 DHW Secondary EXTERNAL CONTROLS RC HC1 Room controller H5 HC2 Room thermostat MIXING VALVE Y1 Open Valve 230V 1A Max Y2 Close valve 230V 1A Max ...

Страница 12: ...ANDREWS COMBIﬂo 10 GB 3 4 APPLICATION EXAMPLES Single Heating Circuit Simple ...

Страница 13: ...ANDREWS COMBIﬂo 11 GB Single Heating Circuit Immersion DHW Circulation pump ...

Страница 14: ...ANDREWS COMBIﬂo 12 GB Mixer Heating Circuit 1 with Room Control Heating Circuit 2 Heating Circuit 3 Weather Compensation ...

Страница 15: ...ANDREWS COMBIﬂo 13 GB Mixer Heating Circuit 1 Mixer Heating Circuit 2 Mixer Heating Circuit 3 Room Weather Compensation ...

Страница 16: ...ANDREWS COMBIﬂo 14 GB Heating Circuit External 0 10V control ...

Страница 17: ...ANDREWS COMBIﬂo 15 GB BMS INTERNET CONNECTIONS ...

Страница 18: ...ANDREWS COMBIﬂo 16 GB 3 5 WIRING DIAGRAMS PCB 1 ...

Страница 19: ...ANDREWS COMBIﬂo 17 GB PCB 2 3 ...

Страница 20: ... 15699 95 786 20 12488 100 677 25 10000 105 586 30 8059 110 508 35 6535 115 443 40 5330 120 387 3 6 2 1K SENSOR OUTSIDE TEMPERATURE SENSOR Temperature o C Resistance Ohms Temperature o C Resistance Ohms 20 7578 12 1690 15 5861 13 1621 10 4574 14 1555 5 3600 15 1492 4 3435 16 1433 3 3279 17 1375 2 3131 18 1320 1 2990 19 1268 0 2857 20 1218 1 2730 21 1170 2 2610 22 1125 3 2496 23 1081 4 2387 24 1040...

Страница 21: ... leaving couplers attached to copper pipework BE WARE Water may still be present in pipework and leak whilst disconnecting Remove 6 connection plates 3 on front 3 on back 6 Unit can now be pulled apart 7 Re assembly is the reverse of above Remember to open any isolation valves you have closed SPLIT UNIT WEIGHT DIMENSIONS LH HEATER SECTION RH TANK SECTION 100 Weight 175 kg 150 Weight 205 kg 100 Wei...

Страница 22: ...ay must be no deeper than 38mm and must be 100mm wider and longer than the boiler It should be piped to an adequate drain using 20mm 0 75in diam eter pipe angled for proper drainage Access must be provided to the front of the boiler with adequate clearance for servicing and operation See 3 1 The ﬂoor on which the boiler is installed must be ﬂat level and of suﬃcient strength to withstand the weigh...

Страница 23: ...the work has been com pleted by a suitably qualiﬁed person The gas supply pipe work is constructed to the current regulations in force The expansion vessels and associated ﬁttings are correctly sized to absorb the total expansion of the system and is in tested working order The circulation pump s output the head and ﬂow direction are suitable for the system The complete system has been cleaned of ...

Страница 24: ...a suitable discharge point See 3 1 for connection locations Do not apply excessive torque to these nipples when making connections The use of an appropriate potable water pipe sealing compound is recommended 4 5 1 COLD WATER SUPPLY SYSTEM The appliance may be connected to an open vent or sealed system supply When connected to a sealed sys tem an unvented water kit must be installed with a minimum ...

Страница 25: ...y greater than the hourly recovery rate of the heater or heaters to which it is ﬁtted the minimum actual capacity allowed for a feed cistern being 227 litres 50 gallons The actual cistern capacity is the capacity to the normal water level of the cistern All cisterns should be manufactured to the relevant Standard The distance from the normal water level to the top of the cistern should comply with...

Страница 26: ... assembling the Pressure Reducing Valve and Double Non Return Valve ensure that the ﬂow arrows marked on the components are pointing in the direction of ﬂow that is towards the appliance The relief valves ﬁtted to this appliance must not be used for any other purpose No ﬁtting should be installed between the expansion valve and the cylinder The cold water for services may be drawn from the 22mm co...

Страница 27: ...sed Two traps are supplied on a 100 300 model and three traps on a 150 300 model These traps should be connected into a drain via a tundish or air break External routed pipework should be avoided but if not possible any outside pipework should be run in a mini mum of 40mm diameter and be insulated to a minimum of 13mm protection against frost and freezing tempera tures Insulation must be waterproo...

Страница 28: ...t horizontal and square with the boss insert the heater into the opening Secure by turning the heater onto the threads Once heater is ﬁrmly screwed into boss ﬁll the tank with water and check for leaks at maximum operational pressure Install electrical supply to immersion heater according to the manufacturers instructions ensuring that the heater is wired with heat resisting or mineral insulated c...

Страница 29: ...l to open and close the valve In the above example the setup for module 1 would be Heating circuit 1 If the temperature of HC1 needed to be increased the controls would supply 230V through QX21 Y1 to open the valve until the temperature rise was detected by the sensor B1 If the temperature of HC1 needed to be decreased the controls would supply 230V through QX22 Y2 to close the valve until the tem...

Страница 30: ...d separately as required 4 12 1 GENERAL REQUIREMENTS CAUTION The installer is responsible for ensuring that the right type of ﬂue system is used and that the diameter and length are correct Only the accessories supplied by Andrews will ensure that the correct system components are used Flue materials must comply with current regulations and standards This combination heater may not be used in area...

Страница 31: ...y be adequate see section 3 1 P7 The Eﬀect of any type of extract fan in the plant room must be considered and an additional air inlet may be needed from outside to counter the eﬀect of any such fans 4 12 2 ROOM SEALED FLUE TYPE C13 C33 C53 There are three approved room sealed arrangements where both the air inlet and ﬂue discharge terminate out side the building Type C13 C33 Flue and air ducts te...

Страница 32: ...external corner 300 300 300 300 K From a terminal facing a terminal 2 465 3 390 2 465 3 390 L Vertically from a terminal on the same wall 2 500 2 500 2 500 2 500 M Horizontally from a terminal on the same wall 1 730 2 165 775 1 105 N From a surface or a boundary line facing a terminal 2 795 3 855 2 795 3 855 P From a opening in a carport e g door windows into the building Not recommended Q Above a...

Страница 33: ...rizontally by selection of the correct ﬂue terminal The ﬂue pipe can be ﬁtted with 90 and 45 degree bends as well as extensions Example C33 A ﬂue system that uses ten straight lengths three 90 bends two 45o bends and a horizontal terminal 10 x 1m straight lengths 10 0 3 x 90 bends 3 0 2 x 45o bends 1 0 1 x Horizontal Terminal 1 0 Total within 18m limit 15 0 Example B23 A system that rises from the...

Страница 34: ...e used but a pressure loss of 2 2 5 mb across the valve must be allowed for when calculating the ﬁnal pressure drop 4 15 2 GAS PIPE WORK A manual valve for isolation of the gas supply to the appliance should be installed nearby and it should be clearly identiﬁed and readily accessible for use at all times Where this appliance is installed in a plant room or purpose built compartment a manually ope...

Страница 35: ...ation to the mains electricity supply should be readily accessible and adjacent to the appliance and should be connected to the mains supply as detailed above 4 16 1 ACCESS TO THE TERMINAL CONNECTIONS Open the wiring centre access door of the left hand side to reveal the electrical connections inside see illustra tion below 4 16 2 REMOTE INDICATORS The appliance has volt free outputs or can be use...

Страница 36: ...used to create additional heating zones or add extra functions to the appliance and its system One module is supplied inside the electrical access panel but a further two can be purchased and added at any time The expansion module ﬁtted inside the electrical access panel is pre conﬁgured to be Module 1 When extra expansion modules are ﬁtted they need to be conﬁgured as Modules 2 3 This is done usi...

Страница 37: ...ted to a 230v max 1A 3 point control actuator to accurately control the tempera ture of the ﬂow around a heating circuit 1 There are ﬁve parameters relating to the mixer valve that can be set to match the system to the valve De pending on the heating circuit being deﬁned these parameters are in the ranges 832 836 1132 1136 and 1432 1436 1 SOLAR DHW A module can be conﬁgured as a dedicated Solar co...

Страница 38: ...sages through PC and Smartphone Plant visualisation in the web browser or customised plant web pages Operation via ACS790 PC Tool Send fault messages to maximum of 4 e mail recipients Create custom system monitoring logs over hours days or weeks and send them automatically to 2 e mail recipients 2 digital inputs for reporting plant room failures or limitations which are outside of the COMBIﬂo dire...

Страница 39: ... TO THE APPLIANCE Paying careful consideration to the manufacturers instructions which accompany the OZW672 the following wiring op tions are recommended For commissioning and operation of the OZW672 please refer to the Siemens guide accompany ing the device ...

Страница 40: ...nsidered When ﬁtting an outside sensor to the appliance please remember to remove and discard the resistor ﬁtted between the electrical connection points 4 19 2 ROOM UNITS QAA55 OPTIONAL QAA55 P N 5138511 4 19 3 POSITIONING OF ROOM UNITS Install room units in the main occupancy rooms The place of installation should be chosen so that the sen sor can capture the room temperature as accurately as po...

Страница 41: ...options are recommended COMBIﬂo connections Up to a maximum of three room units can be connected to the same set of QAA connections inside the COMBIﬂo wiring centre The base provides the power for QAA55 When the room units are removed from the base power is cut oﬀ i e the units are out of operation Pin Refer ence Room unit QAA55 DC 12V Not used BSB ground 2 BSB data 1 ...

Страница 42: ...level automatically Brieﬂy press the operating mode button Parameter Dis play Function Used as ru 1 The room unit is addressed as RU1 default setting ru 2 The room unit is addressed as RU2 ru 3 The room unit is addressed as RU3 Direct adjust ment P1 1 Automatic storage default P1 2 Save with conﬁrmation Operation Lock P2 0 OFF All operating elements released default P2 1 ON The following elements ...

Страница 43: ...and select Conﬁguration menu Depending on which number of the AGU2 5 expansion module being used see section 4 17 for details of the AGU2 5 the setup of the manual thermostat for the control of a heating zone is as follows Line Display Notes 6046 6054 6062 Deﬁne function input H2 Setup as Room thermostat HC1 HC2 or HC3 6047 6055 6063 Deﬁne contact type H2 Normally open or normally closed ...

Страница 44: ...n the isolation valve immedi ately before the connection point to the tank 3 Turn on the entire hot water draw oﬀ taps 4 Turn on the cold water supply and ﬁll the DHW tank 5 Close each hot water draw oﬀ tap when water is discharged 6 After initial ﬁlling open each hot water draw oﬀ tap in succession and check that all the air is vented from the system 7 Check for leaks inside and outside of the ap...

Страница 45: ...ocked out Pressing the reset button for a second will start the ignition sequence process again 5 Repeat until all air has been removed and the appliance pumps are running quietly Conﬁrm that the circulation pump of each heat engine is operating correctly by checking that a solid green LED is illuminated on the front of each heat engine pump and C3 is displayed on the primary DHW pump Do not proce...

Страница 46: ...t commissioning is carried out using Siemens OCI700 service tool or the Andrews commissioning tool available directly from the manufacturer If neither of these tools are available to the commissioning agent then the following manual procedure can be used 5 2 2 HEAT ENGINE ONE TOP MOST UNIT COMMISSIONING Ensure that all the numbered points included in section 5 1 Commissioning General have been com...

Страница 47: ...be 9 2 0 1 Typical expected valves for CO will be between 130ppm and 180ppm but may be higher during initial operation If you are experiencing CO readings that exceed 250ppm after 30 minutes of burner operation please ﬁrst check that your gas analyser is functioning correctly and then contact Andrews Water Heaters on the customer support number given on the rear cover of this manual for advice 9 I...

Страница 48: ... 45O C during the commissioning process if necessary opening taps to bring the temperature down The CO2 combustion ﬁgure should be 9 2 0 1 Typical expected valves for CO will be between 130ppm and 180ppm but may be higher during initial operation If you are experiencing CO readings that exceed 250ppm after 30 minutes of burner operation please ﬁrst check that your gas analyser is functioning corre...

Страница 49: ...ttle adjustment screw covers 30 Press the appliance reset button on the left hand side for approximately one second The heat engine lockouts from the previous heat engine commissioning should now be cleared 31 Ensure that the DHW tank temperature is below 45O C Drawer oﬀ water until the tank temperature is below this value The temperature can be checked on the home page of the appliance display 32...

Страница 50: ... 5 Re secure the gas valve to the venturi 6 Re secure the gas valve to the gas cock ensuring that the rubber O ring remains in place on the gas cock 7 Open gas isolator gas cock and when all conversions are completed turn supply gas on and check for leaks 8 Initially turn the throttle adjustment screw 3 4 turn clockwise Replace the wiring connections Initially turn adjuster 3 4 turn clockwise 9 Fo...

Страница 51: ...ches the same temperature as in the rest of the tank In addition the controls of the appliance provide anti legionella routines to provide additional protection A hatch is ﬁtted to the DHW tank to enable inspection and cleaning should it be required This Appliance is provided with an Anti Legionella programme It is set by default to be oﬀ but can be set to be started manually or periodically Lines...

Страница 52: ...these will follow stages 1 6 NB If a heat engine is in a lockout condition this should not aﬀect the other heat engine s ability to function and the appliance should continue to operate as normal using the other heat engine s 5 6 2 FAULTS AND LOCKOUTS If any heat engine is unable to ignite or detects a safety condition the control of that heat engine will lockout and will be prevented from ﬁring a...

Страница 53: ...ERVICING REQUIREMENTS 1 Check and clean the burner and combustion chamber 2 Check the combustion CO CO2 and gas rate 3 Check condition of both electrodes and the gap of the ignition spark electrode Replace every 24 months 4 Check the air duct and ﬂue seals 5 Check condensate syphon and pipework for leaks and clean out condense trap 6 Inspect and if necessary clean the storage tank Follow the proce...

Страница 54: ...ssembly forwards Once assembly is free from the heat exchanger carry out the following inspection Inspect the black silicone and rope gaskets on the inside of the heat exchanger door Replace seals if there are any signs of damage and in any case replacement every two years is recommended Inspect the burner tube for signs of damage Replace if any damage or burnt areas are found Gaskets Burner tube ...

Страница 55: ...Section 5 2 for details on how to check and adjust the CO2 To check re establish gas and electricity supply and then operate each heat engine for at least 5 minutes If ad justment is required remove the cover over the throttle screw and turn anti clockwise to increase CO2 clockwise to decrease Allow at least a minute between adjustments to obtain stable readings The gas rate will be correct when t...

Страница 56: ... pump 6 2 1 PRESSURE TEMPERATURE RELIEF VALVE The removal of this valve will require either the draining or the valving oﬀ of the system that is above tank level Once Isolated the connecting pipework can be removed and the valve unscrewed from the tank 6 2 2 RETURN FLOW AND DHW FLOW SENSORS The Flow and return sensors are clipped on to the copper pipework beneath the heat exchangers The DHW Flow s...

Страница 57: ...cement is the reverse 6 2 4 FLUE SENSOR This is located at the Flue outlet of the heat exchanger Unplug the sensor from the loom Remove sensor by turning anti clockwise a quarter turn and withdrawing Replacement is the reverse 6 2 5 AVS37 GUI DISPLAY Remove bolt holding right hand door in place and swing open door to reveal the back of the GUI Unplug the cable from the rear of the GUI Use a small ...

Страница 58: ... on the PCB PCB support posts X7 Release in turn all seven PCB support posts by squeezing together the end of the support and withdraw ing the board from each support in turn Replacement is the reverse 6 2 7 SPARK GENERATOR Power connection pull locking tab Fixing screws This is located around the rear of the main electronics housing panel To remove Carefully pull oﬀ the mains connections pull bac...

Страница 59: ...EXCHANGER Remove condense tube Release heat exchanger connections X4 Remove screws from either side of plate heat exchanger Remove the lower left hand side cover to gain better access to the heat exchanger Remove the condense pipework from behind the heat exchanger Remove the two crosshead screws located either side of the heat exchanger Drain as much of the primary and secondary systems water as ...

Страница 60: ...e the heat engine and check for gas leaks After ﬁve minutes check the rate and combustion is correct to the Data table page 8 Adjust using the throttle adjustment screw on the gas valve if necessary Turn clockwise to decrease CO2 anti clockwise to increase CO2 see 5 2 1 for details NB Valve Coil resistances are 2 8k and 1 6k ohms 6 2 11 AIR INTAKE TUBE AND AIR CONTROL FLAP Remove the vacuum air tu...

Страница 61: ...le screw on the gas valve clockwise to decrease CO2 anti clockwise to increase CO2 if required see 5 2 1 for details CAUTION Please ensure that the cork gasket between the fan and the venturi is correctly placed before ﬁxing the two venturi screws The top edge of the gasket should be visible between the fan and the ven turi see illustration 6 2 13 VENTURI Follow instructions 6 2 12 above but do no...

Страница 62: ...to the ﬂue sensor spark generator fan and gas valve Disconnect the air tube and air control ﬂap see 6 2 11 for details Release both the heat exchanger demountable connections of the ﬂow and return pipes by removing the metal clips and pulling the pipes downwards Disconnect the condense drain connection by releasing the plastic clip on the top connector Disconnect the gas valve from the venturi by ...

Страница 63: ... the brackets ensure support is available Replacement is the reverse 6 2 15 WATER PRESSURE SENSOR Screw down the isolator valves immediately above and below the sensor Carefully remove wiring connector Take care not to pull on the wires Connector Isolator valve Unscrew by hand the sensor Replacement is the reverse NOTE It is important not to over tighten the water pressure sensor during ﬁtting The...

Страница 64: ...e new pump seals supplied with the replacement pump Reﬁll and check for leaks 6 2 17 PRIMARY DHW PUMP Q3 SEE 6 4 ITEM 25 Close the shut oﬀ valves immediately above and below the pump Remove the screw on the front face of the pump to free the electrical supply lead connector Shut oﬀ valve Electrical connector securing screw Shut oﬀ valve Undo the unions at the top and bottom of the pump body and re...

Страница 65: ...ront left hand corner of appliance for 10s to remove pressure Shut oﬀ valve top Non return valve Electrical connections Disconnect the two electrical connections Undo the unions at the top and bottom of the pump body and remove pump have a receptacle ready to catch any escaping water Replacement is the reverse Fit the new pump seals suppied with the replacement pump Reﬁll and check for leaks ...

Страница 66: ...e 3 4 G068 18 DHW tank temperature pressure relief valve 1 5139805 19 Condensate pipe non return valve 5142712 20 Condensate trap 5139810 21 Pressure relief valve 4 bar 5142698 22 Tundish 1 inch 4 bar 5139811 23 Plate heat exchanger c w ﬁttings 5139775 24 Heat exchanger pump Q1 5142701 25 DHW primary pump Q3 5142699 26 DHW secondary pump Q33 5142700 27 Non return valve assembly for heat engine DHW...

Страница 67: ...9 42 COMBIﬂo LMS14 PCB 3 5142710 43 AGU2 5 clip in extension 5139793 44 QAC34 Out side sensor 5104726 LPG LPG 5 2mm Oriﬁce 7669653 Optional QAD36 Flow temperature sensor 5103867 Optional QAA55 Programmable room thermostat 5138511 Optional Commissioning controller 5141599 LPG LPG Conversion kit 100 300 7669650 LPG LPG Conversion kit 150 300 7669651 ...

Страница 68: ...ANDREWS COMBIﬂo 66 GB 18 17 16 34 21 20 23 25 24 27 26 6 4 COMPONENT ILLUSTRATIONS 32 36 32 31 27 38 37 43 27 22 ...

Страница 69: ...ANDREWS COMBIﬂo 67 GB 6 4 COMPONENT ILLUSTRATIONS CONTINUED 1 2 3 4 5 29 8 9 11 6 13 12 7 39 40 41 42 35 10 30 ...

Страница 70: ...ANDREWS COMBIﬂo 68 GB 32 24 24 24 26 25 23 27 6 4 COMPONENTS ILLUSTRATIONS CONTINUED 32 27 15 33 14 10 28 ...

Страница 71: ... failure It is recommended that spares are carried for the following essential components 5142708 LMS14 control PCB1 5142697 Primary water pressure sensor 5139793 AGU2 5 extension module 5139795 DHW tank temperature sensor 5142699 DHW Primary pump Q3 5142700 DHW Secondary pump Q33 In order to maintain and have operating all heat engines at all times it would be useful to have the following spares ...

Страница 72: ...rror Any Check connections or replace faulty room unit R1 81 LPB short circuit or no power supply Any LPB Short circuit or no bus power supply Check operation of OCI345 modules and cables 82 LPB address collision Any LPB address duplicated on another Control PCB Check address of all PCB parameter 6600 83 BSB short circuit Any No BSB communication or wires shorted Check operation of room units and ...

Страница 73: ...reading error Temperature reading less than 0O C or greater than 124O C Check ﬂow sensor B2 and replace if neces sary 425 812 Return temperature limit exceeded Check for overheating issues and return sensor B7 performance 424 811 Return temperature reading error Temperature reading less than 0O C or greater than 124O C Check ﬂow sensor B7 and replace if neces sary 111 Shutdown limit thermostat Any...

Страница 74: ...in parameterisation mode Any Code will be displayed when a programming stick is used but should clear when programming is complete Repeat stick operation if fault code persists 217 Sensor error Any Ionisation current fault Check operation of ionisation probe using pa rameter 8329 menu Diagnostics heat generation 765 766 Short circuit of ionisation probe 218 Pressure supervision Any Water pressure ...

Страница 75: ...to clear the opening before replacing the probe 385 Mains under voltage Any Mains voltage below 185v check electrical installation 386 Fan speed tolerance Any Fan outside allowed speed tolerance level Check for possible air or ﬂue restriction Replace fan if all ducting is clear 432 Function earth not connected Any No Ignition earth X1 X17 not connected or earth fault Check site wir ing to applianc...

Страница 76: ...M7889 Rev N Mar 2022 March 2022 ...

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