You can rely on Installation & Service Instructions Gold HE Range A Condensing Combination Boiler These instructions include the Benchmark Commissioning Checklist and should be left with the user for safe keeping.
Natural Gas Potterton Gold Combi 24 HE A G.C.No 47 393 18 Potterton Gold Combi 28 HE A G.C.No 47 393 19 Potterton Gold Combi 33 HE A G.C.No 47 393 20 Building Regulations and the Benchmark Commissioning Checklist Building Regulations (England & Wales) require notification of the installation of a heating appliance to the relevant Local Authority Building Control Department.
Installer Notification Guidelines Choose Building Regulations Notification Route Competent Person's Self Certification Scheme Building Control Install and Commission this appliance to manufacturer's instructions Contact your relevant Local Authority Building Control (LABC) who will arrange an inspection or contact a government approved inspector Complete the Benchmark Checklist If you notify via the ‘Gas Safe Register’, the register will issue the Building Regulations certificate on members’ behalf
Legislation IMPORTANT - Installation, Commissioning, Service & Repair This appliance must be installed in accordance with the manufacturer’s instructions and the regulations in force. Read the instructions fully before installing or using the appliance. In GB, this must be carried out by a competent person as stated in the Gas Safety (Installation & Use) Regulations.
Safe Manual Handling General The following advice should be adhered to, from when first handling the boiler to the final stages of installation, and also during maintenance. Most injuries as a result of inappropriate handling and lifting are to the back, but all other parts of the body are vulnerable, particularly shoulders, arms and hands. Health & Safety is the responsibility of EVERYONE. There is no ‘safe’ limit for one man - each person has different capabilities.
CONTENTS Section 6 © Baxi Heating UK Ltd 2012 Page 1.0 Introduction 7 2.0 General Layout 8 3.0 Appliance Operation 9 4.0 Technical Data 10 5.0 Dimensions and Fixings 11 6.0 System Details 12 7.0 Site Requirements 15 8.0 Flue Options 19 9.0 Plume Displacement 24 10.0 Installation 28 11.0 Commissioning 34 12.0 Completion 37 13.0 Servicing 38 14.0 Changing Components 40 15.0 Setting the Gas Valve 49 16.0 Electrical 50 17.0 Short Parts List 51 18.
1.0 Introduction 1.1 Description 1. The Potterton Gold Combi HE A is a fully automatic gas fired wall mounted condensing combination boiler. It is room sealed and fan assisted, and will serve central heating and mains fed domestic hot water. Case Front Panel 2. The boiler is set to give a maximum output of :24 models - 24 kW DHW 21 kW CH (Condensing) 28 models - 28 kW DHW 25.9 kW CH (Condensing) 33 models - 33 kW DHW 30.3 kW CH (Condensing) 3. It is designed for use on Natural Gas (G20). 4.
2.0 General Layout 2.1 Layout 23 1 15 22 14 13 21 16 20 10 9 8 7 12 1. Expansion Vessel 2. Automatic Air Vent 3. DHW Plate Heat Exchanger / Automatic Bypass 4. Circulation Pump 5. Drain Off Point 6. Safety Pressure Relief Valve 7. Optional Integral Timer Position 8. Central Heating System Pressure Gauge 9. PCB 10. Control Box 11. 3-Way Valve Assembly 12. Condensate Trap 13. Flame Sensing Electrode 14. Spark Electrode 15. Primary Heat Exchanger 16. Fan Assembly 17.
3.0 Appliance Operation 1 Central Heating Circuit 3.1 27 1. With a demand for heating, the pump circulates water through the primary circuit. 2 3 4 7 26 20 5 6 25 24 18 22 9 4. When the demand is satisfied the burner is extinguished and the pump continues to run for a period of 3 minutes (Pump Overrun). 11 23 3.2 10 17 16 15 14 13 12 Fig.
4.0 Technical Data 4.1 Appliance Type C13 Appliance Category C33 C53 CAT I 2H NOx Class Inlet Pressure (Natural Gas - G20) mbar 20 Max Min 24 model kW 20.5 7 28 model kW 24.7 9 33 model kW 28.9 9.7 Heat Input CH (Gross) Max Min 24 model kW 22.7 7.8 Power Consumption 155W (24 & 28 model) 160W (33 model) 28 model kW 27.4 10 Electrical Protection 33 model kW 32.1 10.8 Min 24 model 8.7 28 9.4 Heat Output CH (Condensing) Max Min 24 model kW 21 7.
5.0 Dimensions and Fixings Dimensions A 780mm At least 1.5° E G B 345mm C 450mm D 116mm Ø Min. A E 185mm (207mm for 80/125mm flue systems) F 145mm G 131mm B H 180mm 360° Orientation J 270mm H D C J Flue Ø 100mm F Tap Rail 32.
6.0 System Details 6.1 Information 1. The Potterton Gold Combi HE A Condensing Combination Boiler is a ‘Water Byelaws Scheme - Approved Product’. To comply with the Water Byelaws your attention is drawn to the following installation requirements and notes (IRN). a) IRN 001 See text of entry for installation requirements and notes. b) IRN 302 Byelaw 14. 2. Reference to the WRc publications, ‘Water fittings and materials directory’ and ‘Water supply byelaws guide’ give full details of byelaws and the IRNs.
6.0 System Details 6.5 Stop Valve Double Check Valve System Filling and Pressurising (Fig. 4) 1. A filling point connection on the central heating return pipework must be provided to facilitate initial filling and pressurising and also any subsequent water loss replacement/refilling. Stop Valve A filling loop & instructions are provided with the boiler DHW Mains Inlet Temporary Hose CH Return Fig. 4 2.
6.0 System Details 6.8 1. All DHW circuits, connections, fittings, etc. should be fully in accordance with relevant standards and water supply regulations. Other Tap Outlets Expansion Vessel* Boiler Check Valve* Pressure Reducer Valve* To Hot Taps Stop Tap * See 6.8 for instances when these items may be required Fig. 7 Domestic Hot Water Circuit (Fig. 7) 2. Your attention is drawn to: for GB: Guidance G17 to G24 and recommendation R17 to R24 of the Water Regulations Guide.
7.0 Site Requirements 450mm 5mm Min 5mm Min 7.1 200mm Min (300mm Min if using 80/125mm flueing system) Location 1. The boiler may be fitted to any suitable wall with the flue passing through an outside wall or roof and discharging to atmosphere in a position permitting satisfactory removal of combustion products and providing an adequate air supply. The boiler should be fitted within the building unless otherwise protected by a suitable enclosure i.e. garage or outhouse.
7.0 Site Requirement Gas Service Cock 7.3 Ventilation of Compartments 1. Where the appliance is installed in a cupboard or compartment, no air vents are required. 2. BS 5440: Part 2 refers to room sealed appliances installed in compartments. The appliance will run sufficiently cool without ventilation. 7.4 Gas Supply 1. The gas installation should be in accordance with the relevant standards. In GB this is BS 6891. In IE this is the current edition of I.S. 813 “Domestic Gas Installations”. Fig. 10 2.
Examples are shown of the following methods of termination:i) to an internal soil & vent pipe ii) via an internal discharge branch (e.g. sink waste) downstream of the trap iii) to a drain or gully iv) to a purpose made soakaway v) pumped into an internal discharge branch (e.g. sink waste) downstream of the trap vi) pumped into an external soil & vent pipe vii) to a drain or gully with extended external run & trace heating It is strongly recommended to discharge internally into the household drainage system.
7.0 Site Requirement 7.7 iii) Termination to a drain or gully Boiler 50mm Pipe must terminate above water level but below surrounding surface. Cut end at 45° per me tre of 2.5° M inimum pipe ru n fall iv) Termination to a purpose made soakaway Further specific requirements for soakaway design are referred to in BS 6798. Boiler 500mm min 50mm p er metr e of pip 2.
v) pumped into an internal discharge branch (e.g. sink waste) downstream of the trap Sink 50mm 7.0 Site Requirement per me tre of p ipe run 2.5° M inimum fall Pipe must terminate above water level but below surrounding surface. Cut end at 45° 7.7 Condensate Drain (cont.) 12. A boiler discharge pump is available, ‘MULTIFIT’ part no. 720648301. This pump will dispose of both condensate & high temperature water from the relief valve. It has a maximum head of 5 metres.
Terminal Position with Minimum Distance (Fig. 18) (mm) 7.0 Site Requirements A1 Directly below an opening, air brick, opening windows, etc. B1 Above an opening, air brick, opening window etc. C1 Horizontally to an opening, air brick, opening window etc. D2 Below gutters, soil pipes or drain pipes. E2 Below eaves. F2 Below balconies or car port roof. G2 From a vertical drain pipe or soil pipe. H2 From an internal or external corner. I Above ground, roof or balcony level.
8.0 Flue Options 8.1 Horizontal Flue Systems 1. The standard flue is suitable only for horizontal termination applications. (ii) (i) 2. All fittings should be fully engaged. The approximate engagement is 40mm. Apply soap solution to the seal on each fitting to aid assembly. 3. Maximum permissible equivalent flue lengths are:(60/100) (80/125) Horizontal Concentric 10 metres 20 metres 4. Any additional “in line” bends in the flue system must be taken into consideration.
8.0 Flue Options Vertical Flues 8.2 Twin & Vertical Flue Systems 1. Maximum permissible equivalent flue lengths are:- (ii) (60/100) 10 metres 15 metres Vertical Concentric Vertical Twin Pipe (i) (80/125) 20 metres 2. Any additional “in line” bends in the flue system must be taken into consideration. Their equivalent lengths are:Concentric Pipes: 135° bend 0.5 metres 93° bend 1.0 metres Twin Flue Pipe 135° bend 0.25 metres 120mm Min 91.5° bend 0.
8.0 Flue Options 8.3 A4 A2 Flue Accessories Key Accessory Size Code No FLUE GROUP A Concentric Flue System 100mm diameter A3 Telescopic Internal Flue Kit 315-500mm 5119654 A2 Telescopic Flue (inc. elbow) 315-500mm 5118069 A Horizontal Flue Terminal (inc.
8.0 Flue Options 8.4 Air Duct Connection Twin Flue Duct Adaptor 1. The kit allows connection of a twin flue system to the boiler adaptor. Flue Duct Connection 8.5 Twin Flue Connection 1. Engage the twin flue duct adaptor in the boiler adaptor, making sure that it is pushed down as far as possible. 2. Ensure that the air & flue ducts are connected correctly and that they are adequately supported (at least once every metre using the available pipe supports). Boiler Adaptor 3.
8.0 Flue Options 8.6 1. In the case of a pitched roof 25 - 50 degrees, position the lead tile to replace/flash over existing roof tiling. Make an aperture in the roof suitable for the lower tube of the roof terminal and ensure the integrity of the roof cover is maintained. The adjustable plastic collar can either be positioned on the lead tile or the lower tube of the roof terminal prior to the final positioning of the vertical flue through the tile.
93° Elbow/Plume Outlet Assembly 60Ø Support Bracket O Ring 0.9 metres 60Ø Exhaust Flue Pipe 60Ø Support Bracket O Ring Fig. 22 Flexible Flue Trim Adaptor ‘Jubilee’ Clip O Ring 9.0 Plume Displacement 9.1 Plume Displacement Kit (Fig. 23) Kit No 5118638 Content of kit 1 0.9m 60/100 Concentric Flue 1 1m 60 Dia Exhaust Flue Pipe 1 Adaptor 2 60 Dia Support Brackets 1 93° Elbow/Plume Outlet Assembly 1 Flexible Flue Trim 3 “O” Rings 1 ‘Jubilee Clip 1 Boiler Elbow 1.
16 14 14 12 60 Ø Exhaust (metres) X 16 24 10 8 28/ 33 6 2 0 0 2 3 4 5 6 7 8 28/ 33 6 0 9 1 Concentric 60/100 Flue (metres) Y 2 3 4 5 6 7 8 9 Concentric 60/100 Flue (metres) Y Example 1 Flue Lengths - Not Permissible Example 2 Flue Lengths - OK 14 24 10 8 28/ 33 6 Example 3 - Flue Lengths OK In the example shown in Fig. 4 assume that the concentric part of the flue needs to be 2.3 metres long. Find the position of ‘2.
9.0 Plume Displacement 9.3 General Fitting Notes 1. Cut a hole in the external wall which the concentric flue assembly will pass through. The hole should allow the flue to fall back to the boiler at an angle of at least 1.5°. 2. When completed the terminal must be at least 2 metres above ground level (Fig. 19). 3. Measure and cut to size the concentric assembly and any extensions that are being used. Min. 2 metres 4. Insert the concentric assembly through the hole from outside the building. 5.
9.0 Plume Displacement Plume Outlet Elbow 9.3 General Fitting Notes (cont.) 15. For aesthetic purposes it is permissible to route the 60Ø exhaust in an enclosed box, but the air inlet and plume outlet MUST remain in free air. 16. It is also possible to separate the plume outlet from the 93° elbow to allow the flue to be installed as shown in Fig. 34. 50 0m m Mi n. 17. To do this, first slacken the two screws retaining the plume outlet to the elbow, and remove the outlet (Fig. 35).
10.0 Installation 10.1 Unpacking & Initial Preparation The gas supply, gas type and pressure must be checked for suitability before connection (see Section 7.4). NOTE: a small amount of water may drain from the boiler in the upright position. 1. Remove staples, open flaps and remove the cardboard sheet. Remove the polystyrene side pieces and literature. Two people can then lift out the boiler (Figs. 39 & 40). Fig. 39 2. After considering the site requirements (see Section 7.
10.0 Installation 10.3 Note: Full instructions are provided in the Filling Loop Kit pack. Fitting the Filling Loop Kit 1. The filling loop kit supplied with the boiler can be connected to the taps on the wall plate at this point. (Either one of two types of loop kit will be supplied both function in the same way, differing only in detail). 2. The filling loop is to be connected between the mains cold water inlet and central heating return isolation taps. 3.
Wall Plate 10.0 Installation 10.4 Sealing Washers Fitting The Boiler 1. Lift the boiler using the Lifting Points as shown by the shaded areas (Fig. 45). The boiler should be lifted by TWO PEOPLE. Engage the slots at the top rear of the boiler on the wall plate (Fig. 46) (see Safe Manual Handling page 5). 2. Ease the boiler forwards and remove the sealing caps from the boiler connections. NOTE: A small amount of water may drain from the boiler once the caps are removed. Fig. 46 Fig.
10.0 Installation m 5m 68 10.7 m 0m 10 Fitting The Flue HORIZONTAL FLUE 1. The standard flue is suitable for lengths between 100mm minimum and 685mm maximum, as measured from the edge of the flue elbow outlet to the joint between the terminal and air duct (Fig. 48). Fig. 48 2. Locate the flue elbow on the adaptor at the top of the boiler. Set the elbow to the required orientation (Fig. 50). NOTE: The flue elbow is angled at 93 degrees to ensure a fall back to the boiler. 3.
10.0 Installation Inner Flue Support Bracket 10.7 Fitting the Flue (Cont) 6. The inner flue duct support bracket may be in the waste portion of the flue. In this case retrieve the bracket before discarding the waste. 7. Take the inner flue support bracket (if not already fitted) and engage it over the flue duct. This will centralise the flue and air ducts, and ease assembly (Fig. 53). Fig. 53 8. Insert the flue through the hole in the wall.
10.0 Installation 10.8 Making The Electrical Connections NOTE: Both the Live and Neutral connections are fused. To connect an external control proceed as follows:1. Slacken the facia panel securing screws and lift the outercase panel so that its securing tabs are clear of the facia. Remove the panel. Terminal Block Cover 2. Completely undo the screws securing the facia panel and hinge it down (Fig. 58). 3. Undo the terminal block cover securing screw and remove the cover (Fig. 58). Fig. 58 Fig. 59 5.
11.0 Commissioning 11.1 Commissioning the Boiler 1. Reference should be made to BS:EN 12828 & 14336 when commissioning the boiler. 2. At the time of commissioning, complete all relevant sections of the Benchmark Checklist at the rear of this publications. Screw 3. Open the mains water supply to the boiler. 4. Open all hot water taps to purge the DHW system. Pump Automatic Air Vent 5. Ensure that the filling loop is connected and open, then open the heating flow and return valves on the boiler. 6.
x2 11.0 Commissioning 11.2 Check the Operational (Working) Gas Inlet Pressure 1. Ensure that all controls are calling for heat, and the selector switch is in the central heating and hot water position ( ). The current boiler temperature is shown on the display. Central Heating Temperature Control Selector Switch Domestic Hot Water Temperature Control Fig. 66 2. It is necessary to set the boiler to ‘Calibration Mode’. Display 3.
11.0 Commissioning 11.3 Setting the Timer 10 NOTE: If the integral timer is not required fit the blanking plate supplied in the installation kit. 9 Time Pointer The Electro-Mechanical Timer allows the central heating system to be set every 15 minutes. 8 Constant 7 Using the three position switch the timer will allow either constant operation, timed operation or central heating off. Timed Move the switch button by sliding to the desired position. AM Off Three position switch (Fig.
12.0 Completion 12.1 Case Front Panel Completion 1. Instruct the user in the operation of the boiler and system explaining the operational sequence. 2. Set the central heating and hot water temperature control knobs to the requirements of the user. 3. Carefully read and complete all sections of the Benchmark Commissioning Checklist at the rear of this publication that are relevant to the appliance and installation. These details will be required in the event of any warranty work.
13.0 Servicing 13 .1 Annual Servicing 1. For reasons of safety and economy, it is recommended that the boiler is serviced annually. Servicing must be performed by a competent person in accordance with B.S. 7967-4. Case Front Panel 2. After servicing, complete the relevant Service Interval Record section of the Benchmark Commissioning Checklist at the rear of this publication.
4 ±0.5 13.0 Servicing Burner Viewing Window 13.2 Annual Servicing - Inspection (Cont) 6. Undo the nut on the gas inlet pipe to the venturi (Fig. 77) and pull the sensing pipe off the fan. 7. Disconnect the electrode leads, noting their position, and the fan electrical plugs. Sensing Electrode 8. Undo the four nuts retaining the combustion box cover to the heat exchanger. 7.5 ±1 Spark Ignition Electrode Electrode Position 9.
14.0 Changing Components Bracket Igniter Igniter Feed Plug IMPORTANT: When changing components ensure that both the gas and electrical supplies to the boiler are isolated before any work is started. When the component has been changed turn the selector switch fully anticlockwise against the spring pressure to the reset position and hold for 5 seconds to reset the boiler before recommissioning. See Section 13.2 “Annual Servicing” for removal of case panel, door etc. Electrode Leads 14.1 Igniter (Fig.
14.0 Changing Components 14.3 Fan (Fig. 83) 1. Undo the nut on the gas inlet pipe to the venturi (Fig. 83) and pull the sensing pipe off the fan. 2. Disconnect the electrode leads, noting their position and disconnect the fan electrical plugs. 3. Undo the screws securing the collector to the cover (33 models) or extension piece (24 & 28 models). 4. Remove the collector and fan assembly, being careful to retain the injector in the venturi. 5.
14.0 Changing Components Cover 14.6 Burner (Fig. 85) Burner 1. Undo the screws securing the collector to the cover and venturi. (On 24 & 28 models there is an extension piece fitted to the cover, remove this also). Gasket Extension Piece (24 & 28 models) 2. Withdraw the burner from the cover and replace with the new one. 3. Examine the gasket, replacing if necessary. 4. Reassemble in reverse order. Venturi 14.7 Insulation (Fig. 86) 1. Remove the electrode leads, noting their positions.
14.0 Changing Components Electrical Plug 14.8 Flue/Heat Exchanger Thermostat Sensor Flue/Heat Exchanger Thermostat Sensor (Fig. 87) 1. Ease the retaining tab on the sensor away and disconnect the electrical plug. 2. Turn the sensor 90° anticlockwise to remove - it is a bayonet connection. 3. Reassemble in reverse order. Fig. 87 14.9 Water Pressure Sensor (Fig. 89) 1. Drain the primary circuit. 2. Disconnect the two wires from the sensor. 3.
14.0 Changing Components 14.14 Pump - Head Only (Fig. 91) 1. Drain the boiler primary circuit and remove the socket head screws securing the pump head to the body and draw the head away. 2. Undo the screw on the pump wiring cover and remove the cover. Using a suitable flat bladed screw driver press the cable securing levers downwards to release each wire after noting their position. 3. A standard replacement Grundfos 15-60 head can now be fitted. Connect the pump wiring to the new head.
14.0 Changing Components 14.17 Gauge Retaining Bracket Pressure Gauge (Figs. 94 & 95) 1. Drain the boiler primary circuit and undo the nut on the pressure gauge capillary. 2. Undo the screws securing the gauge retaining bracket. Pressure Gauge Fig. 94 3. Remove the bracket and gauge assembly. Depress the barbs on the side of the gauge and remove the retaining bracket. 4. Examine the sealing washer, replace if necessary. 5. Reassemble in reverse order. 14.18 Hall Effect Sensor (Fig. 96) 1.
14.0 Changing Components 14.20 Plate Heat Exchanger (Fig. 98) 1. Drain the boiler primary circuit and remove the gas valve as described in section 14.23. Plate Heat Exchanger 2. While supporting the heat exchanger undo the screws securing it to the brass manifolds. 3. Withdraw the heat exchanger upwards, taking care not to damage any wires or controls. Seals 4. There are four rubber seals between the manifolds and heat exchanger which may need replacement. LH Location Stud Fig. 98 5.
14.0 Changing Components 14.22 P.C.B. (Fig. 102) 1. Note the settings of the temperature control knobs, rotate them fully anticlockwise and carefully pull them off the drive pins. 2. Completely undo the screws securing the control box cover and release the cover retaining barbs from their slots. Disengage the rear of the cover from the control box hinge pin (Fig. 101). 3. Note the position of all plugs and wires on the P.C.B. and disconnect them. 4. Undo the securing screws and remove the P.C.B.
14.0 Changing Components Venturi Inlet Pipe 14.24 Gas Valve (Fig. 103) IMPORTANT: After replacing the valve the CO2 must be checked and adjusted as detailed in Section 15.0 Setting the Gas Valve. Only change the valve if a suitable calibrated combustion analyser is available, operated by a competent person - see section 13.1. Gas Valve Sensing Pipe 1. Turn the gas cock off and undo the nut on the gas feed elbow under the boiler. Power Lead 2.
x2 15.0 Setting the Gas Valve 15.1 Central Heating Temperature Control Selector Switch IMPORTANT: The CO2 must be only be checked and adjusted to set the valve if a suitable calibrated combustion analyser is available, operated by a competent person - see Section 13.1 Domestic Hot Water Temperature Control Fig. 105 1. The combustion (CO2) may be checked after running the boiler for several minutes. To do this it is necessary to set the boiler to ‘Calibration Mode’.
16.0 Electrical 16.
17.0 Short Parts List Short Parts List 426 306 315 316 311 419 404 Key No.
18.0 Fault Finding 18.1 NOTE: When instructed to turn the selector to the reset position turn the selector switch fully anticlockwise against the spring pressure to the reset position and hold for 5 seconds to reset the boiler. Initial Fault Finding Checks 1. Check that gas, water and electrical supplies are available at the boiler. 2. Electrical supply = 230V ~ 50 Hz. 3. CH water system pressurised to 0.5 bar minimum when the boiler is cold. 4. The preferred minimum gas pressure is 20 mbar. 5.
18.0 Fault Finding Refer to Section 16.0 “Illustrated Wiring Diagram” for position of terminals and components Central Heating - Follow operational sequence (do Turn selector switch to The display illuminates NO Go to section ‘A’ YES Error 110 flashing Error 130 flashing Error 133 flashing YES Turn the selector switch to reset position for 5 seconds YES If the error 110 is still flashing.
18.0 Fault Finding Domestic Hot Water - Follow operational sequence Turn selector switch to The display illuminates NO Go to section ‘A’ YES Error 110 flashing Error 133 flashing YES Turn the selector switch to reset position for 5 seconds YES If the error 110 is still flashing. Go to section ‘J’ NO YES Error 20, 28 or 50 flashing Go to section ‘E’ NO YES Error 119 flashing Go to section ‘C’ Go to section ‘B’ NO Turn Domestic Hot Water thermostat to Maximum. Open DHW tap fully.
18.0 Fault Finding Fault Finding Solutions Sections A Is there 230V at: 1. Main terminals L and N 2. Main terminal fuse 3. B NO Check electrical supply NO Replace fuse NO Check wiring PCB - X1 connector terminals 1,2 NO Display illuminated Replace PCB Is there 230V at: YES 1. Pump 2. PCB - X3 connector terminals 3 & 4 NO If pump jammed, release NO Replace pump Replace PCB YES Change pump supply cable C 1. YES CH system pressure less than 0.5 bar NO 2. D 1.
18.0 Fault Finding E E20 or E50 - Temperature sensors faulty. Cold resistance approximately 10kí @ 25° C (DHW and CH sensors) 20kí @ 25° C (Flue sensor) (resistance reduces with increase in temp.) NO Replace sensor or PCB (E28) E28 - Incorrect PCB fitted F 1. 2. Check and correct the connection of the tube between the venturi and gas valve NO Gas at burner Ensure gas is on and purged PCB - X3 connector is 230V AC across terminals 1 & 2 YES Replace gas valve NO Replace PCB G 1.
18.0 Fault Finding I 1. 2. Check that the supply pressure at the test point on the gas valve is a MINIMUM of 17mbar Check and correct if necessary 1. The mechanical set of the gas valve (CO2 values - see instruction) 2. Flame sensing electrode and lead connections 3. Flame sensing electrode position YES Flame current should be more than 0.5 A J 1. Overheat thermostat operated or faulty, i.e. continuity across thermostat terminals NO NO Replace PCB Replace flame sensing electrode Allow to cool.
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GAS BOILER SYSTEM COMMISSIONING CHECKLIST This Commissioning Checklist is to be completed in full by the competent person who commissioned the boiler as a means of demonstrating compliance with the appropriate Building Regulations and then handed to the customer to keep for future reference. Failure to install and commission according to the manufacturer’s instructions and complete this Benchmark Commissioning Checklist will invalidate the warranty.
Service Record It is recommended that your heating system is serviced regularly and that the appropriate Service Interval Record is completed. Service Provider Before completing the appropriate Service Record below, please ensure you have carried out the service as described in the manufacturer’s instructions. Always use the manufacturer’s specified spare part when replacing controls. Service 1 Date: Service 2 Date: Engineer Name: Engineer Name: Company Name: Company Name: Telephone No.
All descriptions and illustrations provided in this leaflet have been carefully prepared but we reserve the right to make changes and improvements in our products which may affect the accuracy of the information contained in this leaflet. All goods are sold subject to our standard Conditions of Sale which are available on request. P O T T E RTON A Trading Division of Baxi Heating UK Ltd (3879156) Brooks House, Coventry Road, Warwick.
