Ideal Heating LOGIC+ SYSTEM S18 Installation & Servicing
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Ideal Heating LOGIC+ SYSTEM S18 Installation & Servicing

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H E A T I N G
INSTALLATION
& SERVICING
LOGIC+ SYSTEM
S18 S30
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.
December 2020
UIN 225326 A03

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  • Page 1 H E A T I N G INSTALLATION & SERVICING LOGIC+ SYSTEM S18 S30 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. December 2020 UIN 225326 A03...
  • Page 2 Installation and Servicing...

  • Page 3: Boiler Restart

    NOTES FOR THE INSTALLER FOR ANY TECHNICAL QUERIES PLEASE RING THE HUNT HEATING INSTALLER HELPLINE : 1300 00 1800 NOTE. BOILER RESTART PROCEDURE - To restart the boiler press the RESTART button. The boiler will repeat the ignition sequence if a heat demand is present.

  • Page 4: Table Of Contents

    CONTENTS GENERAL ..............7 SERVICING ............... 36 Servicing Schedule ............ 36 Introduction ..............7 Boiler Front Panel Removal / Replacement ....37 Operation ..............7 Weather Shield Removal / Replacement ....37 Safe Handling ............... 7 Fan And Venturi Assembly Removal And Cleaning ..38 Optional Extra Kits ............
  • Page 5 SECTION 1 - GENERAL Table 1 - General Data Boiler Gas Supply Natural Gas at 1.13kPa Gas Supply Connection 1/2” Injector Size (mm) 4.15 4.65 Flow Connection Central Heating 3/4” Return Connection Central Heating 3/4” Flue Terminal Diameter Average Flue Temp-Mass Flow Rate 58°C - 8g/s 69°C - 13g/s Content (±...
  • Page 6 SECTION 1 - GENERAL LOGIC+ SYSTEM S Natural Gas only Destination Country: AU, NZ COMMISSIONING CHECKLIST DETAILS oiler Page Page Make and model ............6 Burner operating pressure ........n/a Appliance serial no. on data badge ..Front Cover Central heating flow temp....measure and record SEDBUK No.

  • Page 7: General

    SECTION 1 - GENERAL GENERAL 1.2 OPERATION When there is a demand for CH, the heating system is supplied at 1.1 INTRODUCTION the selected temperature of between 30 C and 80 The Logic + System S range of boilers are wall mounted, full The boiler features a comprehensive diagnostic system which sequence, automatic spark ignition, low water content, fanned gives detailed information on the boiler status when operating, and...

  • Page 8: Safety

    SECTION 1 - GENERAL 1.5 SAFETY 1.8 GAS SUPPLY Current Gas Safety (installation and use) regulations or rules The boiler MUST be installed on a gas supply with a in force: governed meter only. It is the responsibility of the Gas Installer to size the gas The appliance is suitable only for installation in AU &...

  • Page 9: 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 regulations and laws. The following notes are intended for general guidance: 1.

  • Page 10: 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 (internal boilers only). 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 11: 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 12: 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 13: System Requirements - Central Heating

    SECTION 1 - GENERAL 1.18 SYSTEM REQUIREMENTS - CENTRAL HEATING Notes a. The method of filling, refilling, topping up or flushing sealed circuits from the mains supply must be done in accordance with national and Safety valve setting local regulations ie: proper backflow prevention must be in place. Vessel charge pressure 50 to 75 b.

  • Page 14: System Balancing

    SECTION 1 - GENERAL 1.19 SYSTEM BALANCING The boiler does not normally need a bypass but at least some radiators on the heating circuit, of load of at least 10% of the minimum boiler output, must be provided with open manual radiator valves so that this minimum heating load is always available. See note regarding thermostatic radiator valves on Page 10.

  • Page 15: Installtion

    SECTION 2 - INSTALLATION INSTALLTION 2.1 INTERNAL BOILER ASSEMBLY - Exploded View Note that item numbers are linked to the spares list PUMP HEAD VENTURI THERMISTOR CONTROL/NO FLOW PUMP AUTO AIR VENT IGNITION LEAD PRESSURE RELIEF VALVE BURNER CONTROLS BOX LID PIPE - PRV OUTLET GASKET - BURNER CONTROL BOX FRONT...

  • Page 16: External Boiler Assembly - Exploded View

    SECTION 2 - INSTALLATION 2.2 EXTERNAL BOILER ASSEMBLY - Exploded View Note that item numbers are linked to the spares list 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 17: 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 18: 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 The wall mounting template is located on the internal protective 1 5 5 V - See Diagram in...

  • Page 19: Preparing The Wall

    SECTION 2 - INSTALLATION 2.7 PREPARING THE WALL IMPORTANT. Ensure that, during the cutting operation, masonry falling outside of the building does not cause damage or personal injury. Rear flue only Side flue only 1. Cut the flue hole (preferably with a 5” core boring tool), 5"...

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

    SECTION 2 - INSTALLATION 2.10 FITTING THE WALL MOUNTING BRACKET - EXTERNAL BOILER Align the template on the wall, ensuring adequate clearances are met, as defined in Section 1 and level and mark the 6 holes. Drill the 6 holes with the appropriate masonry drill size required for the masonry plugs used.

  • 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

    SECTION 2 - INSTALLATION 2.13 DETERMINING THE FLUE LENGTH 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 Edge of turret to outside face of wall plus to outside face of wall plus to outside face of wall plus 44mm = ue length 44mm = ue length 44mm = ue length...

  • Page 25: Installing The Flue (Internal Boiler)

    SECTION 2 - INSTALLATION 2.15 INSTALLING THE FLUE (INTERNAL BOILER) FITTING FLUE THROUGH THE WALL 1. Fit external black wall seal ensuring the inside of the outer lip is in contact with the terminal lip you have been measuring from (see fig 1) 2.

  • 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 22mm OD) d. External plastic pipe must be a minimum of 30mm ID (typically 32 OD) before it passes through the sleeved wall. e. All horizontal pipe runs, must fall a minimum of 45mm per metre away from the Boiler.

  • Page 28: Connections & Filling

    SECTION 2 - INSTALLATION 2.19 CONNECTIONS & FILLING NOTES. Ensure all boss blanking plugs are removed before connecting hardware. Ensure each union is fitted with fibre seals provided. Do not subject any of the isolating valves to heat as the seals may be damaged. WATER CONNECTIONS CH 1.

  • Page 29: Electrical Connections

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

  • Page 30: Replacing Pre-Fitted Mains Cable

    SECTION 2 - INSTALLATION SECTION 2 - INSTALLATION 2.22 REPLACING PRE-FITTED MAINS CABLE 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 2.21 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 a 1. The whole of the gas installation, including the meter, 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 Legend BOILER BOILER A. Central Heating Temperature Knob B. Mode Knob ºC C. Boiler Status D. Burner ‘on’ indicator E. Central Heating Economy Setting G. System Pressure Gauge RESTART M. Function Button N. Restart Button 1.

  • Page 34: General Checks

    SECTION 2 - INSTALLATION 2.26 GENERAL CHECKS Make the following checks for correct operation: CENTRAL HEATING (CH) MODE WATER CIRCULATION SYSTEM 1. Ensure that the CH external controls are 1. With the system COLD, check that the initial pressure is correct to the calling for heat.

  • Page 35: Accessing The Installer Mode

    SECTION 2 - INSTALLATION 2.28 ACCESSING THE INSTALLER MODE 5. “dU” will be shown To access Installer Mode press the function button and “RESTART” But- press the function button. tons together for more than 5s. 6. “P1” will be shown 1.

  • Page 36: 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 37: 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 38: 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 39: 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 40: 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 Sections 3.14 & 3.15. 2.

  • Page 41: 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 42: 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 43: 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 44: Flame Detection Electrode Replacement

    SECTION 3 - SERVICING 3.15 FLAME DETECTION ELECTRODE REPLACEMENT 1. Refer to Section 3.9. 2. Remove the burner. Refer to Section 3.11. 3. Unplug the flame detection lead from the Flame Detection Electrode electrode. 4. Remove the 2 screws retaining the detection electrode.

  • Page 45: Gas Control Valve Replacement

    SECTION 3 - SERVICING 3.17 GAS CONTROL VALVE REPLACEMENT 1. Refer to Section 3.9. 2. Unplug the electrical lead connection from the gas control valve. 3. Remove the outlet gas valve clip and slide the pipe upwards 4. Undo the gas inlet pipe union at the inlet to the gas valve.

  • Page 46: Pcb Replacement

    SECTION 3 - SERVICING 3.19 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 47: Pressure Gauge Replacement

    SECTION 3 - SERVICING 3.21 PRESSURE GAUGE REPLACEMENT 1. Refer to Section 3.9. 2. Drain the heating system. Refer to Section 3.20. 3. Remove the boiler front (See Section 3.2), lower the control panel and remove the control box cover. 4.

  • Page 48: Pump Automatic Air Vent Replacement

    SECTION 3 - SERVICING 3.23 PUMP AUTOMATIC AIR VENT REPLACEMENT 1. Refer to Section 3.9. 2. Drain the boiler. Refer to Section 3.20. 3. Remove the expansion vessel. Refer to Section 3.28. Dust Cap 4. Firstly, increase access area by disconnecting the 22mm pipe connection at top of pump chamber and bottom of heat exchanger and remove pipe.

  • Page 49: Water Pressure Switch Replacement

    SECTION 3 - SERVICING 3.25 CH WATER PRESSURE SWITCH REPLACEMENT 1. Refer to Section 3.9. 2. Drain the boiler. Refer to Section 3.20. 3. Pull off the two electrical connections. 4. Using a suitable tool, pull out the metal retaining clip. 5.

  • Page 50: Heat Engine Replacement

    SECTION 3 - SERVICING 3.27 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 51: Expansion Vessel Recharging & Replacement

    SECTION 3 - SERVICING 3.28 EXPANSION VESSEL RECHARGING & REPLACEMENT RECHARGING 1. Remove the charge point cover. Recharge 2. Recharge the tank pressure to 75kPa. Point 3. Re-assemble in reverse order 4. Check operation of the boiler. Refer to Sections 2.25 & 2.26. REPLACEMENT 5.

  • Page 52: Fault Finding

    SECTION 4 - FAULT FINDING FAULT FINDING 4.1 FAULT FINDING CHART MAIN MENU In order to assist fault finding the boiler has a 7 segment display. The key to the display codes is as follows: GO TO Section 4.2 - ‘L1’...

  • Page 53: L1' - Flow Temperature Overheat Lockout Or No Water Flow Lockout

    SECTION 4 - FAULT FINDING 4.2 ‘L1’ - FLOW TEMPERATURE OVERHEAT LOCKOUT OR NO WATER FLOW 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 If the PCB has been replaced check a BCC has been fitted then restart the boiler.

  • Page 54: L6' - False Flame Lockout

    SECTION 4 - FAULT FINDING 4.4 ‘L6’ - FALSE FLAME LOCKOUT Check routing and integrity of internal boiler Restart the boiler, does Boiler Work OK? wiring is OK. Check condition of Flame Sense Electrode and replace if deteriorated. Separate the flame detection electrode in-line Replace Flame Detection Electrode connector.

  • Page 55: L4' Or 'F4' - Control / No Flow Thermistor Fault

    SECTION 4 - FAULT FINDING 4.8 ‘L4’ OR ‘F4’ - CONTROL / NO FLOW THERMISTOR FAULT Fit a new Thermistor Remove the Control/No Flow Thermistor from the Heat Exchanger and disconnect the wires. Check the resistance using a suitable multimeter connected across the thermistors terminal pins.

  • Page 56: No Ch Operation

    SECTION 4 - FAULT FINDING 4.11 NO CH OPERATION Move the mode knob to the ON position Is the mode knob in the ON position? Switch the Timer, Room Stat and Cylinder Stat On Are the Timer and the Room Thermostat or cylinder thermostat switched on? Open the Radiator Valves Are the Radiator Valves Open?

  • Page 57: 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 58: 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 59 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 60 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 61 Installation and Servicing...
  • Page 62 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 63 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 64 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.
  • Page 65 H E A T I N G USER GUIDE LOGIC+ SYSTEM S18 S30 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. December 2020 UIN 225326 A03...
  • Page 66 INTRODUCTION CONTENTS The Logic + System S is a system boiler, featuring full sequence automatic spark ignition and fan assisted combustion. It is designed to provide central heating and hot water when a separate 1. Introduction .............. 2 hot water cylinder is installed. Safety .................

  • Page 67: Boiler Operation

    BOILER OPERATION Legend A. CH temperature control B. Mode Control Knob C. Boiler Status BOILER BOILER D. Burner ‘on’ indicator E. Function Button ºC F. Restart Button G. Pressure Gauge H. Central Heating Economy Setting RESTART TO START THE BOILER EFFICIENT HEATING SYSTEM OPERATION If a programmer is fitted refer to separate instructions for the The boiler is a high efficiency, condensing appliance which will...

  • Page 68: General Information

    CONDENSATE DRAIN GENERAL INFORMATION This appliance is fitted with a siphonic condensate trap system BOILER PUMP that reduces the risk of the appliance condensate from freezing. The boiler pump will operate briefly as a self-check once every 24 However should the condensate pipe to this appliance freeze, hours, regardless of system demand.

  • Page 69: Points For The Boiler User

    POINTS FOR THE BOILER USER Note. In line with our current warranty policy we would ask that you check through the following guide to identify any problems external to the boiler prior to requesting a service engineers visit. Should the problem be found to be other than with the appliance we reserve the right to levy a charge for the visit, or for any pre-arranged visit where access is not gained by the engineer.

  • Page 70: Normal Operation Display Codes

    NORMAL OPERATION DISPLAY CODES DESCRIPTION DISPLAY CODE ON BOILER The boiler is in standby operation awaiting either a central heating call or hot water demand. The boiler has a call for central heating but the appliance has reached the desired temperature set on the boiler.

  • Page 71: Fault Codes

    FAULT CODES DESCRIPTION ACTION DISPLAY CODE ON BOILER Low Water Pressure Check system water pressure is between 100 & 150kPa (1 - 1.5 bar) on the system pressure gauge. To re-pressurise the system see Section 3. If the boiler still fails to operate then please contact Hunt Heating(if under warranty) or alternatively a Licensed &...

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