Ideal Heating LOGIC+ COMBI C35 Installation & Servicing
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Ideal Heating LOGIC+ COMBI C35 Installation & Servicing

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H E A T I N G
INSTALLATION
& SERVICING
LOGIC+ COMBI
C35
When replacing any part on this appliance, use only spare parts that you can be assured conform to the safety and performance
specification that we require. Do not use reconditioned or copy parts that have not been clearly authorised by Hunt Heating.
November 2020
UIN 225325 A03

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  • Page 1 H E A T I N G INSTALLATION & SERVICING LOGIC+ COMBI When replacing any part on this appliance, use only spare parts that you can be assured conform to the safety and performance specification that we require. Do not use reconditioned or copy parts that have not been clearly authorised by Hunt Heating. November 2020 UIN 225325 A03...
  • Page 2 Installation and Servicing...
  • Page 3 NOTES FOR THE INSTALLER FOR ANY TECHNICAL QUERIES PLEASE RING THE HUNT HEATING INSTALLER HELPLINE : 1300 00 1800 NOTE. BOILER RESTART PROCEDURE - Press the RESTART button. The boiler will repeat the ignition sequence if a heat demand is present. DOCUMENT AMENDMENTS Relevant Installation changes implemented in this book from Mod Level ..

  • Page 4: Table Of Contents

    CONTENTS SERVICING ............... 40 GENERAL ..............8 Introduction ..............8 Servicing Schedule ............ 40 Boiler Front Panel Removal / Replacement ....41 Operation ..............8 Safe Handling ............... 8 Weather Shield Removal / Replacement ....41 Optional Extra Kits ............8 Fan And Venturi Assembly Removal And Cleaning ..
  • Page 5 SECTION 1 - GENERAL Table 1 - General Data Gas Supply Natural Gas at 1.13kPa Gas Supply Connection 1/2” Injector Size (mm) Inlet Connection Domestic Hot Water 1/2” Outlet Connection Domestic Hot Water 1/2” Flow Connection Central Heating 3/4” Return Connection Central Heating 3/4”...
  • Page 6 SECTION 1 - GENERAL Table 2 - Performance Data - Central Heating Boiler Boiler Input ‘Q’ Net CV 24.3 Gross CV 27.0 Boiler output 24.2 (non-condensing) Mean 70°C Boiler output (condensing) Mean 40°C 25.6 Gas Consumption MJ/h 27.16 92.94 Seasonal Efficiency* SEDBUK 2005 91.1% Seasonal Boiler Efficiency*...
  • Page 7 SECTION 1 - GENERAL LOGIC+ COMBI C Natural Gas only Destination Country: AU, NZ COMMISSIONING CHECKLIST DETAILS oiler Page Page Make and model ............7 Burner operating pressure ........n/a Appliance serial no. on data badge ..Front Cover Central heating flow temp....measure and record SEDBUK No.

  • Page 8: General

    SECTION 1 - GENERAL GENERAL 1.3 SAFE HANDLING This boiler may require 2 or more operatives to move it to its 1.1 INTRODUCTION installation site, remove it from its packaging base and during movement into its installation location. Manoeuvring the boiler The Logic+ Combi C range of boilers are wall mounted, full may include the use of a sack truck and involve lifting, pushing sequence, automatic spark ignition, low water content, fanned...

  • Page 9: Safety

    SECTION 1 - GENERAL 1.5 SAFETY 1.6 SAFE HANDLING OF SUBSTANCES Current Gas Safety (installation and use) regulations or No asbestos, mercury or CFCs are included in any part of the rules in force: boiler or its manufacture. The appliance is suitable only for installation in AU & NZ and 1.7 LOCATION OF BOILER should be installed in accordance with the rules in force.

  • Page 10: Flue Installation

    SECTION 1 - GENERAL 1.9 FLUE INSTALLATION Pluming will occur at the terminal so terminal positions where this could cause a nuisance should be avoided. The flue must be installed in accordance with any local & state regulation laws. The following notes are intended for general guidance: 1.

  • Page 11: Terminal

    SECTION 1 - GENERAL ..FLUE INSTALLATION - CONT 1.10 TERMINAL 1.14 ELECTRICAL SUPPLY The terminal assembly can be adapted to accommodate various WARNING. wall thicknesses. Refer to Section 2.13. Electrical safety of the appliance is reached only when it is correctly connected to an efficient earthing system as specified by 1.11 AIR SUPPLY current safety standards.

  • Page 12: Boiler Dimensions, Services & Clearances - Internal

    SECTION 1 - GENERAL 1.16 BOILER DIMENSIONS, SERVICES & CLEARANCES - INTERNAL The boiler connections are made on the boiler connection tails. Refer to Section 2.19. The following minimum clearances must be maintained for operation and servicing. Additional space will be required for installation, depending upon site conditions.

  • Page 13: Boiler Dimensions, Services & Clearances - External

    SECTION 1 - GENERAL 1.17 BOILER DIMENSIONS, SERVICES & CLEARANCES - EXTERNAL The boiler connections are made on the boiler connection tails. Refer to Section 2.19. The following minimum clearances must be maintained for operation and servicing. Additional space will be required for installation, depending upon site conditions.

  • Page 14: System Requirements - Central Heating

    SECTION 1 - GENERAL 1.18 SYSTEM REQUIREMENTS - CENTRAL HEATING Safety valve setting Notes Vessel charge pressure 50 to 75 a. The method of filling, refilling, topping up or flushing sealed primary hot water circuits from the mains via a temporary hose System pre-charge pressure kPa None connection is only allowed if acceptable to the local water...

  • Page 15: System Balancing

    SECTION 1 - GENERAL ..SYSTEM REQUIREMENTS - CONT 1.19 SYSTEM BALANCING Domestic Hot Water The boiler does not normally need a bypass but at least some radiators on the heating circuit, of load 1. The DHW service must be in accordance with AS/NZS 3500 & AS/ of at least 10% of the minimum boiler output, must NZS 5601.

  • Page 16: Installation

    SECTION 2 - INSTALLATION INSTALLATION Note that item numbers are linked to the spares list 2.1 INTERNAL BOILER ASSEMBLY - Exploded View Pump Head Plate Heat Exchanger Gasket - Burner Ignitor Unit Auto Air Vent Flow Regulator Sump Clean Out Cover Thermistor Flow Diverter Valve Motor Flow Sensor/Turbine...

  • Page 17: External Boiler Assembly - Exploded View

    SECTION 2 - INSTALLATION Note that item numbers are linked to the spares list 2.2 EXTERNAL BOILER ASSEMBLY - Exploded View Flue Turret Flue Terminal Flue Terminal Seal External Flue Terminal Aperture Seal Internal Boiler Accessory Pack External Boiler Accessory Pack Wall Mounting Bracket Assembly Wall Mounting Bracket Seal Kit Front Removable Panel...

  • Page 18: Unpacking - Internal Boiler

    SECTION 2 - INSTALLATION 2.3 UNPACKING - INTERNAL BOILER Unpack and check the contents. Pack Contents Boiler Accessory Pack Compression Coupler Wall Mounting Plate Installation / User Instructions Wall Mounting Template (located on internal protective packaging) 2.4 UNPACKING - EXTERNAL BOILER Unpack and check the contents.

  • Page 19: Front Panel Removal

    SECTION 2 - INSTALLATION 2.5 FRONT PANEL REMOVAL 1. Loosen the 2 screws retaining the front panel. 2. Pull the two clips downwards to disengage. 3. Pull the front panel forward and upwards to remove. 2.6 WALL MOUNTING TEMPLATE Extended centre line 1 5 5 The wall mounting template is located on the internal protective “A”...

  • Page 20: Fitting The Wall Mounting Bracket - Internal Boiler

    SECTION 2 - INSTALLATION 2.8 FITTING THE WALL MOUNTING 2.9 MOUNTING THE BOILER - INTERNAL BRACKET - INTERNAL BOILER Screw the wall mounting plate to the wall using 2 wall plugs 1. Ensure the plastic plugs are removed from both the CH (previously fitted) with the 2 screws provided.

  • Page 21: Mounting The Boiler - External

    SECTION 2 - INSTALLATION 2.11 MOUNTING THE BOILER - EXTERNAL Ensure the flue turret is perpendicular to the front of the boiler. Fit the flue turret. Refer to section 2.14. Ensure the plastic plugs are rmoved from both the CH and DHW connections before mounting the boiler. Note: Boiler may contain residual water.

  • Page 22: Attaching Weather Shield

    SECTION 2 - INSTALLATION 2.12 ATTACHING WEATHER SHIELD Lift the weather shield over the appliance and slide down onto the locating bracket. Insert the internal flue seal into the orifice. Fit external black flue seal, ensuring the inside of the outer lip is in contact with the terminal lip.

  • Page 23: Determining The Flue Length And Flue Packs Required

    SECTION 2 - INSTALLATION 2.13 DETERMINING THE FLUE LENGTH AND FLUE PACKS REQUIRED IMPORTANT. The boiler must be installed in a vertical position Only use water as a lubricant during assembly. in accordance to the installation instructions. The ‘B’ pack terminal is classed as part of the maximum flue length.

  • Page 24: Cutting & Setting The Flue Length

    SECTION 2 - INSTALLATION ..DETERMINING THE FLUE LENGTH AND FLUE PACKS REQUIRED, CONT’D FIGURE 1 Edge of turret Edge of turret to outside face of wall plus to outside face of wall plus 44mm = ue length 44mm = ue length 100mm Note.

  • Page 25: Fitting The Optional Roof Flue Kit

    SECTION 2 - INSTALLATION FITTING THE TURRET - Ensure the condense trap/siphon is filled with water 1. Ensure the rubber seal is fitted correctly on the appliance manifold and that all flue seals are undamaged. 2. Hold the flue firmly and push the turret on until it has travelled 30mm on to the flue pipe and is fully engaged. Make sure the flue has not rotated or moved forward during fitting and the flue seam is uppermost.

  • Page 26: Assembling The Roof Flue Kit

    SECTION 2 - INSTALLATION 2.17 ASSEMBLING THE ROOF FLUE KIT Determine the correct height that the flue should terminate above the roof. If after calculating or measuring the overall flue height from the top of the boiler, it is necessary to cut both pipes of assembly A, then ensure they are cut equally leaving the inner flue tube longer than the outer air tube as supplied.

  • Page 27: Condensate Drain

    SECTION 2 - INSTALLATION 2.18 CONDENSATE DRAIN Condensate Drain his appliance is fitted with a siphonic 75mm condensate trap e. All horizontal pipe runs must fall a minimum of 45mm per metre system that requires filling before operating the appliance for the away from the Boiler.

  • Page 28: Connections & Filling

    SECTION 2 - INSTALLATION 2.19 CONNECTIONS & FILLING NOTES. Note. The domestic hot water flow rate is Ensure all boss blanking plugs are removed before connecting hardware. automatically regulated to a maximum: Ensure each union is fitted with fibre seals provided. 35 = 14.5 (3.2 gpm) Do not subject any of the isolating valves to heat as the seals may be...

  • Page 29: Electrical Connections

    SECTION 2 - INSTALLATION 2.20 ELECTRICAL CONNECTIONS Wiring should be 3 core PVC insulated cable, not less than WARNING. This appliance MUST be earthed. 0.75mm (24 x 0.2mm), and to local and national prevailing regulations. A mains supply of 230Vac ~ 50 Hz is required. Connection must be made in a way that allows complete The fuse rating should be 3A.

  • Page 30: Replacing Pre-Fitted Mains Cable

    SECTION 2 - INSTALLATION 2.22 REPLACING PRE-FITTED MAINS CABLE Strain Relief If it is necessary to use an alternative mains cable to the one pre-fitted then use the following guide. Replacement wiring should comply with notes in Section 2.20 and be caried out by a qualified person to avoid a hazard.

  • Page 31: Wiring Diagram

    SECTION 2 - INSTALLATION 2.23 WIRING DIAGRAM Installation and Servicing...

  • Page 32: Commissioning And Testing

    SECTION 2 - INSTALLATION 2.24 COMMISSIONING AND TESTING A. Electrical Installation B. Gas Installation 1. Checks to ensure electrical safety should be carried out by 1. The whole of the gas installation, including the meter, a competent person. should be inspected and tested for tightness and purged in accordance with the recommendations of AS/NZS 5601.

  • Page 33: Initial Lighting

    SECTION 2 - INSTALLATION 2.25 INITIAL LIGHTING BOILER Legend A. Domestic Hot Water Temperature Knob B. Central Heating Temperature Knob C. Mode Knob MODE D. Boiler Status Display E. Burner ‘on’ Indicator Central Heating Economy Setting N. Pressure Gauge 1. Check that the system has been filled and that the boiler is not airlocked.

  • Page 34: The Display

    SECTION 2 - INSTALLATION 2.26 THE DISPLAY Notes: Boiler frost protection - boiler fires if temperature is below 5º C. The user control has a dot matrix LCD to inform the user about the status of the boiler. The temperatures shown below are for illustration purposes only. The measured temperatures will be shown on the boiler.
  • Page 35 SECTION 2 - INSTALLATION MENU OPERATIONS Efficiency Level Change Service Time Fault Help To view the efficiency level of the boiler The time until the next service required This feature provides a list of potential press “Menu” and the following screen will message is shown can be changed as follows: corrective actions at an installer level for all be displayed:...
  • Page 36 SECTION 2 - INSTALLATION MENU OPERATIONS Sensor Readings Maximum Flow Temperature Service Mode Maximum DHW Rate To view the current Water Pressure, It is possible to limit the maximum flow This feature will run the burner at Switched Live Status, DHW Flow Rate, temperature that can be set from the CH maximum DHW rate.
  • Page 37 SECTION 2 - INSTALLATION MENU OPERATIONS Pump Modulation Diverter Valve Mid Position The boiler is factory set for 70% minimum To move the diverter valve to the mid CH pump speed. This can be increased position, ensure there are no demands to 100%.

  • Page 38: General Checks

    SECTION 2 - INSTALLATION 2.27 GENERAL CHECKS Make the following checks for correct operation in: WATER CIRCULATION SYSTEM 1. With the system COLD, check that the initial pressure is 1. Fully open all DHW taps in turn and ensure that water flows correct to the system design requirements.

  • Page 39: Restart Procedure

    SECTION 2 - INSTALLATION 2.28 RESTART PROCEDURE To restart the boiler, press the RESTART button (F). Legend A. Domestic Hot Water Temperature Knob B. Central Heating Temperature Knob BOILER C. Mode Knob D. Boiler status Display E. Burner ‘on’ Indicator F.

  • Page 40: Servicing

    SECTION 3 - SERVICING SERVICING 3.1 SERVICING SCHEDULE For the very latest copy of literature for specification practices, visit our website www.huntheat.com.au, where you will be able to download the relevant information. WARNING. Always turn OFF the gas supply at the gas service cock, and switch OFF and disconnect the electricity supply to the appliance before servicing.

  • Page 41: Boiler Front Panel Removal / Replacement

    SECTION 3 - SERVICING 3.2 BOILER FRONT PANEL REMOVAL / REPLACEMENT REMOVAL REPLACEMENT 1. Loosen the two screws retaining the front panel. 3. Hook the panel onto the top retaining clips. 2. Pull the two clips down to disengage and pull panel forward 4.

  • Page 42: Fan And Venturi Assembly Removal And Cleaning

    SECTION 3 - SERVICING 3.4 FAN AND VENTURI ASSEMBLY REMOVAL AND CLEANING 1. Disconnect the electrical leads from the fan. 2. Remove the clip from the gas control valve outlet and ease the pipe upwards. Rotate and then ease down to remove. 3.

  • Page 43: Burner Removal And Cleaning

    SECTION 3 - SERVICING 3.5 BURNER REMOVAL AND CLEANING 1. Ensure the sump is fully drained 2. Undo the two screws and remove the sump cover retaining the lower flue manifold. 3. Lift the manifold to clear the bottom sealing gasket and remove manifold.

  • Page 44: Cleaning The Heat Exchanger

    SECTION 3 - SERVICING 3.7 CLEANING THE HEAT EXCHANGER Note: Ensure the condensate trap/siphon is fully drained before cleaning. Refer to Ignition Electrode Flame Detection Section 3.19. 1. Remove ignition and flame detection electrodes. Refer to Section 3.14 & 3.15. 2.

  • Page 45: Replacement Of Components

    SECTION 3 - SERVICING 3.9 REPLACEMENT OF COMPONENTS GENERAL IMPORTANT. Ensure all gas valve connections are gas tight with a gas When replacing ANY component soundness check up to the gas control valve. 1. Isolate the electricity supply. When work is complete, the front panel must be correctly refitted - ensuring that a good seal is made.

  • Page 46: Burner Injector Replacement

    SECTION 3 - SERVICING 3.11 BURNER INJECTOR REPLACEMENT 1. Refer to Section 3.9. 2. Disconnect the electrical leads from the fan. 3. Remove the clip from the gas valve to venturi pipe and ease the pipe upwards, rotate and ease down to remove. 4.

  • Page 47: Return Thermistor Replacement

    SECTION 3 - SERVICING 3.13 RETURN THERMISTOR REPLACEMENT 1. Refer to Section 3.9. 2. Unclip the return thermistor from the return pipe and withdraw it from the boiler. 3. Disconnect the electrical lead from the thermistor. 4. Reconnect the electrical lead to the new thermistor and reassemble in reverse order, ensuring that the thermistor is securely fitted to the pipe on the thermistor locator tab as shown.

  • Page 48: Flame Detection Electrode Replacement

    SECTION 3 - SERVICING 3.15 FLAME DETECTION ELECTRODE REPLACEMENT 1. Refer to Section 3.9. Flame Detection Electrode 2. Remove the burner. Refer to Section 3.5. 3. Unplug the flame detection lead from the electrode. 4. Remove the 2 screws retaining the detection electrode.

  • Page 49: Diverter Valve Actuator Replacement

    SECTION 3 - SERVICING 3.18 DIVERTER VALVE ACTUATOR REPLACEMENT Refer to Section 3.9. To remove the motor: 1. Remove the condensate trap/siphon. Refer to Section 3.6. 2. Place a flat bladed screwdriver in the actuator slot provided and ease out the actuator. 3.

  • Page 50: Pcb Replacement

    SECTION 3 - SERVICING 3.20 PCB REPLACEMENT Note. Fit the earth strap provided with the PCB to your wrist and secure to a suitable earth on the boiler chassis. 1. Refer to Section 3.9. 2. Ensure the control knobs are in the 12 o clock position. 3.

  • Page 51: Dhw Flow Turbine Sensor Replacement

    SECTION 3 - SERVICING 3.21 DHW FLOW TURBINE SENSOR REPLACEMENT 1. Refer to Section 3.9. 2. Drain the DHW system. Refer to Section 3.22. 3. Pull off the electrical connection. 4. Using a suitable tool, lift and remove the retaining clip. 5.

  • Page 52: Safety Relief Valve Replacement

    SECTION 3 - SERVICING 3.24 SAFETY RELIEF VALVE REPLACEMENT 1. Refer to Section 3.9. 2. Drain the boiler. Refer to Section 3.22. 3. Remove the clip on return thermistor. Refer to Section 3.13. 4. Pull out and remove the clip (positioned behind the safety valve) retaining the safety valve.

  • Page 53: Diverter Valve Body Assembly Replacement

    SECTION 3 - SERVICING 3.27 DIVERTER VALVE BODY ASSEMBLY REPLACEMENT To remove the valve body assembly: 16. Remove the two diverter valve body fixing screws and withdraw the diverter valve body assembly. 1. Refer to Section 3.9. 17. Fit the new diverter valve body assembly and replace the 2.

  • Page 54: Water Pressure Switch Replacement

    SECTION 3 - SERVICING 3.30 CH WATER PRESSURE SWITCH REPLACEMENT 1. Refer to Section 3.9. 2. Drain the boiler. Refer to Section 3.22. 3. Pull off the two electrical connections. 4. Using a suitable tool, pull out the metal retaining clip.

  • Page 55: Heat Engine Replacement

    SECTION 3 - SERVICING 3.32 HEAT ENGINE REPLACEMENT Refer also to Section 2.1 - ‘Boiler Exploded View’ IMPORTANT Before starting the removal procedure, protect the gas and electrical controls with a waterproof sheet or plastic bag. 1. Refer to Section 3.9. 14.

  • Page 56: Expansion Vessel Recharging & Replacement

    SECTION 3 - SERVICING 3.33 EXPANSION VESSEL RECHARGING & REPLACEMENT RECHARGING Recharge Point 1. Refer to Section 3.9. 2. Remove the charge point cover. 3. Recharge the tank pressure to 75kPa. 4. Re-assemble in reverse order. 5. Check that the boiler operates in both DHW & CH modes.

  • Page 57: Fault Finding

    SECTION 4 - FAULT FINDING FAULT FINDING 4.1 FAULT FINDING CHART MAIN MENU Overheat Lockout 4/4 Overheat Lockout 3/4 Overheat Lockout 1/4 Overheat Lockout 2/4 Check Radiator Valves Restart Boiler With Boiler Off & Bleed Radiators Go to Section 4.2 And Boiler Valves If Fault Persists Flow Temperature...
  • Page 58 SECTION 4 - FAULT FINDING Low Mains Voltage Contact Electricity Low Mains Voltage Contact Provider Electricity Provider Menu PCB Fault Replace PCB Contact Installer Restart Menu Spare PCB Not Set Switch Off Follow instructions Wait 5s in Section 3.19 Switch On Restart Menu High Mains Voltage...

  • Page 59: Overheat Lockout

    SECTION 4 - FAULT FINDING 4.2 OVERHEAT LOCKOUT Is the Boiler and CH System filled with water and all Fill and vent the system and open all isolation and radiator valves open? isolation valves, then restart boiler Check that the Pump is rotating freely. Is Is the Flow/Return Differential across the Boiler in the Differential now below 20°C? excess of 30°C?

  • Page 60: Flame On Before Gas Valve On

    SECTION 4 - FAULT FINDING 4.4 FLAME ON BEFORE GAS VALVE ON Check routing and integrity of internal boiler wiring is OK. Check Restart the boiler, does Boiler Work OK? condition of Flame Sense Electrode and replace if deteriorated. Replace Flame Detection Electrode Separate the flame detection electrode in-line connector.

  • Page 61: Fan Fault

    SECTION 4 - FAULT FINDING 4.7 FAN FAULT Does the wiring from the Fan to the PCB have Rectify Wiring & secure connections at both ends and has not connections deteriorated? Does the wiring have continuity? Replace PCB Is there 230Vac at the Blue and Brown connections to the 3 way connection on the Fan? Replace Fan 4.8 FLOW THERMISTOR FAULT...

  • Page 62: Outside Sensor Fault

    SECTION 4 - FAULT FINDING 4.10 OUTSIDE SENSOR FAULT Securely connect the wiring at both the Is the wiring securely connected at both the boiler and boiler and Outside Sensor Outside Sensor? Disconnect the wires to the outside sensor. Check the resistance using a suitable multimeter connected across the Outside Sensor’s terminal pins.

  • Page 63: No Ch Operation But Dhw Works Ok

    SECTION 4 - FAULT FINDING 4.11 NO CH OPERATION BUT DHW WORKS OK Move the mode knob to the Winter position Is the mode knob in the Winter position? Are the Timer and the Room Thermostat switched Switch the Timer and Room Thermostat On Open the Radiator Valves Are the Radiator Valves Open? There is no Voltage from the Timer/Room Stat.

  • Page 64: No Hw But Ch On

    SECTION 4 - FAULT FINDING 4.12 NO HW BUT CH ON Does the display show a similar screen to the screen shown? Adjust flow rates to achieve 35º Are the flow rates correct as per Section 1.2. temp rise and check filter is not blocked with debris.

  • Page 65: Spare Parts

    SECTION 5 - SPARE PARTS SPARE PARTS When replacing any part on this appliance use only spare parts that you can be assured conform to the safety and performance specification that we require. Do not use reconditioned or copy parts that have not been clearly authorised by Hunt Heating. Failure to do so could affect safety or performance of this appliance.
  • Page 66 INTENTIONALLY LEFT BLANK Installation and Servicing...

  • Page 67: Commissioning & Servicing

    COMMISSIONING & SERVICING GAS BOILER SYSTEM COMMISSIONING CHECKLIST & WARRANTY VALIDATION RECORD Address: Boiler make and model: Boiler serial number: Commissioned by (PRINT NAME): Company name: Telephone number: Company email: Company address: Commissioning date: Heating and hot water system complies with the appropriate Building Regulations? Optional: Building Regulations Notification Number (if applicable): Time, temperature control and boiler interlock provided for central heating and hot water Water quality...
  • Page 68 SERVICE & INTERIM BOILER WORK RECORD It is recommended that your boiler and heating system are regularly serviced and maintained, in line with manufacturers’ instructions, and that the appropriate service / interim work record is completed. Service provider When completing a service record (as below), please ensure you have carried out the service as described in the manufacturers’ instructions. Always use the manufacturers’...
  • Page 69 SERVICE & INTERIM BOILER WORK RECORD It is recommended that your boiler and heating system are regularly serviced and maintained, in line with manufacturers’ instructions, and that the appropriate service / interim work record is completed. Service provider When completing a service record (as below), please ensure you have carried out the service as described in the manufacturers’ instructions. Always use the manufacturers specified spare parts.
  • Page 70 FLOWCHART FOR CO LEVEL AND COMBUSTION RATIO CHECK ON COMMISSIONING A CONDENSING BOILER Important Preliminary Information on Checks The air gas ratio valve is factory-set and must not be adjusted DURING COMMISSIONING. If the boiler requires conversion to operate with a different gas family (e.g. conversion from natural gas to LPG) sepa- rate guidance is provided with the conversion kit supplied and this must be followed.
  • Page 71 Start Set Boiler to Maximum Gas Rate Carry Out Flue Integrity Check Using Analyser In accordance with boiler instructions, Insert analyser probe into air inlet test point (where available) and allow set boiler to operate at maximum rate readings to stabilise. (full load condition).
  • Page 72 Technical Training Our Expert Academy offer a range of training options designed and delivered by our experts in Heating. For details please contact: www.expert-academy.co.uk Hunt Heating pursues a policy of continuing improvement in the design and performance of its products. The right is therefore reserved to vary specification without notice.

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