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MAXIM
High efficiency combi boiler
Users Instructions
Installation &
Servicing
Instructions
MAXIM 25 G.C. N° 47-364-31
MAXIM 29 G.C. N° 47-364-32
THESE INSTRUCTIONS
TO BE RETAINED
BY USER
Vokèra is a licensed member of the Benchmark scheme
which aims to improve the standards of installation and
commissioning of domestic hot water systems in the UK.
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Summary of Contents for Riello Vokera MAXIM 25
- Page 1 MAXIM High efficiency combi boiler Users Instructions Installation & Servicing Instructions MAXIM 25 G.C. N° 47-364-31 MAXIM 29 G.C. N° 47-364-32 THESE INSTRUCTIONS TO BE RETAINED BY USER Vokèra is a licensed member of the Benchmark scheme which aims to improve the standards of installation and commissioning of domestic hot water systems in the UK.
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Page 2: Table Of Contents
Users instructions 3A.5 AIR SUPPLY ................ 12 3A.6 WATER CIRCULATION ............12 3A.7 ELECTRICAL SUPPLY ............12 THINGS YOU SHOULD KNOW ..........1 3A.8 MOUNTING ON A COMBUSTIBLE SURFACE ....12 GAS APPLIANCES ..............1 3A.9 TIMBER FRAMED BUILDINGS ........... 12 ELECTRICAL SUPPLY ............ -
Page 3: Users Instructions
USERS INSTRUCTIONS INTRODUCTION Dear Customer Your Vokèra MAXIM boiler has been designed to meet and exceed the very latest standards in gas central heating technology, and if cared for, will give years of reliable use and efficiency. Please therefore take some time to read these instructions carefully. Do’s and Don’t’s - Do ensure that the system pressure is periodically checked - Do ensure that the boiler should not be used by children or unassisted disabled people... - Page 4 Fig. 1 MODE SELECTOR SWITCH HEATING GREEN YELLOW TEMPERATURE TEMPERATURE SELECTOR SELECTOR PRESSURE GAUGE BOILER STATUS LED Green LED Boiler is working/responding to a heating/hot water request Red LED Boiler has identified a fault and has failed-safe. Refer to instructions on how to reset Yellow LED DHW pre-heat function working/Service operation DHW TEMPERATURE SELECTOR Move the selector clockwise to increase the hot water outlet temperature, or counter-clockwise to reduce the temperature...
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Page 5: Getting Started
2. GETTING STARTED 2.1 BEFORE SWITCHING ON 2.3 LIGHTING THE BOILER Before switching the appliance on, please familiarise yourself Ensure the gas and electrical supply to the boiler are with: turned on. - how to isolate the appliance from the gas, water, and electricity Turn the mode selector switch to the ON position. -
Page 6: What If
Fig. 2 control valve control temporary valve connection flow/return double pipe supply pipe check valve APPLIANCE STATUS LED AND FAULT CODES Alarm type Led RED Led YELLOW Led GREEN Action Purge cycle mode active BLINKING BLINKING BLINKING Alarm high limit thermostat Final BLINKING Reset appliance. -
Page 7: Installation And Servicing Instructions
INSTALLATION AND SERVICING INSTRUCTIONS INTRODUCTION All installers are asked to follow the Benchmark Scheme by This booklet is an integral part of the appliance. It is therefore adhering to the Code of Practise, which can be obtained from necessary to ensure that the booklet is handed to the person www.centralheating.co.uk. -
Page 8: Section 1 - Design Principles And Operating Sequence
SECTION 1 - DESIGN PRINCIPLES AND OPERATING SEQUENCE 1.1 PRINCIPLE COMPONENTS 1.5 SAFETY DEVICES • A fully integrated electronic control board featuring electronic When the appliance is in use, safe operation is ensured by: temperature control, anti-cycle control, pump over-run, self- •... -
Page 9: Section 2 - Technical Data
SECTION 2 - TECHNICAL DATA 2.1 Central Heating MAXIM 25 MAXIM 29 Heat input (kW) 20.00 25.00 Maximum heat output (kW) 60/80°C 19.50 24.45 Minimum heat output (kW) 60/80°C 4.91 5.90 Maximum heat output (kW) 30/50°C 20.84 26.23 Minimum heat output (kW) 30/50°C 5.36 6.40 Minimum working pressure... - Page 10 MAXIM 25 Seasonal space heating energy effi- Water heating energy effi- ciency class ciency class Parameter Symbol Value Unit Parameter Symbol Value Unit Seasonal space heating ener- Rated heat output Prated ηs gy efficiency For boiler space heaters and boiler combination heaters: For boiler space heaters and boiler combination heaters: useful useful heat output efficiency...
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Page 11: Pump Duty
2.13 PUMP DUTY Fig. 6 shows the flow-rate available – after allowing for pressure loss through the ap- pliance – for system requirements. When using this graph, apply only the pressure loss of the system. The graph is based on a 20 C temperature differential. -
Page 12: Section 3 - General Requirements (Uk)
SECTION 3 - GENERAL REQUIREMENTS (UK) This appliance must be installed by a competent person in ac- BS 5440 Part 1, when the terminal is 0.5 metres (or less) below cordance with the Gas Safety (Installation & Use) Regulations. plastic guttering or 1 metre (or less) below painted eaves. 3.1 RELATED DOCUMENTS 3.5 AIR SUPPLY The installation of this boiler must be in accordance with the... -
Page 13: Electrical Supply
3.6.8 FREQUENT FILLING control Frequent filling or venting of the system may be indicative valve of a leak. Care should be taken during the installation of the control temporary valve appliance to ensure all aspects of the system are capable of connection withstanding pressures up to at least 3 bar. -
Page 14: Air Supply
3A.7 ELECTRICAL SUPPLY the terminal must be protected by a guard of durable material. The guard must be fitted centrally over the terminal. Refer to The appliance is supplied for operation on 230V @ 50Hz I.S. 813, when the terminal is 0.5 metres (or less) below plastic electrical supply;... -
Page 15: Section 4 - Installation
SECTION 4 - INSTALLATION 4.1 DELIVERY 29450126 1000mm extension 1000mm Due to the weight of the appliance it may be necessary for 29450127 2000m extension 2000mm two people to lift and attach the appliance to its mounting. The 29450128 Telescopic extension 372/519mm appliance is contained within a heavy-duty cardboard carton. - Page 16 NOTE These instructions relate only to the Vokèra condensing 60/100mm concentric flue system. For specific details on the installation of the 80/125mm concentric flue system please refer to the instructions supplied. The vertical flue terminal can be connected directly to the appliance flue outlet.
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Page 17: Connecting The Gas And Water
4.6 CONNECTING THE GAS AND WATER • blue wire to NEUTRAL supply • green/yellow to EARTH connection. The appliance is supplied with an accessory pack that includes Insert the supplied 3-AMP fuse into the fused isolator or fused plug. service valves. The service valves are for welding. -
Page 18: Section 5 - Commissioning
SECTION 5 - COMMISSIONING 5.1 GAS SUPPLY INSTALLATION Inspect the entire installation including the gas meter, test for tightness and purge. Refer to BS 6891 (I.S. 813 in ROI) for specific instruction. 5.2 THE HEATING SYSTEM The appliance contains components that may become damaged or rendered inoperable by oils and/or debris that are residual from the installation of the system, consequently it is essential that the system be flushed in accordance with the following... -
Page 19: Final Flushing Of The Heating System
5.13 FINAL CHECKS 813 ROI). Should a cleanser be used, it must be suitable for Aluminium heat exchangers. It shall be from a reputable manu- • ENSURE ALL TEST NIPPLES ON THE APPLIANCE GAS facturer and shall be administered in strict accordance with the VALVE ARE TIGHT AND CHECKED FOR TIGHTNESS. -
Page 20: Replacement Of Components
The flame side of the burner is made of state-of-the-art material. Being fragile: - be particularly careful when handling, mounting or disman- tling the bur ner and adjacent components (e.g. electrodes, insulation panelling etc.) - avoid direct contact with any cleaning appliance (e.g. brushes, aspira tors, blowers, etc.). -
Page 21: Return Thermistor
6.10 RETURN THERMISTOR (fig. 4 - pos. 21) Carry out component removal procedure as described in 6.4. Unclip and remove the air chamber front cover. Unclip the re- turn thermistor from the return inlet pipe. Disconnect thermistor electrical plug. Replace in the reverse order. 6.11 PRINTED CIRCUIT BOARD (fig. 25) Carry out component removal procedure as described in 6.4. -
Page 22: Main Heat Exchanger
6.16 MAIN HEAT EXCHANGER (fig. 29) Carry out component removal procedure as described in 6.4. Remove the air chamber front cover. Locate and remove the gas pipe locking pin (A1) and swing/rotate the gas pipe away from the fan assembly (B1), (if necessary unscrew the gas pipe from the gas valve). -
Page 23: Flue Collector Removal
6.20 FLUE COLLECTOR REMOVAL (fig. 33) Carry out component removal procedure as described in 6.4. Remove the air chamber front cover. Remove the heat exchang- er as per 6.16. Locate and remove the screw (Y1) that secures the flue gas analysis test point cover (Z1). Disconnect the flues thermistor wiring connections. -
Page 24: Section 7 - Checks, Adjustments And Fault Finding
SECTION 7 - CHECKS, ADJUSTMENTS AND FAULT FINDING 7.1 CHECKING APPLIANCE OPERATION the output required. When the boiler has reached the set point (+ hysterisis), the burner will switch off. The built-in anti-cycle When carrying out any repairs or servicing to the appliance, device prevents the burner from re-lighting for approximately the relevant commissioning procedure must be undertaken to 3-minutes. -
Page 25: Combustion Analysis Test
7.3.1 CO FUNCTION SETTINGS Locate the CO button (see 7.3) Select the main selector switch in position FUNCTIONS ACTION ON THE BUTTON LED STATUS combustion analysis mode press once = burner running at maximum heating yellow led blinking gas valve maximun setting press twice = burner running at maximum DHW yellow led blinking + red led fixed gas valve minimum setting... -
Page 26: Fault Finding
7.9 COMPONENT VALUES & 7.7.3 POLARITY CHECK With the appliance connected to the electrical supply and us- CHARACTERISTICS ing a suitable multimeter, carry out the following voltage tests: • connect test leads between the Live & Neutral connections COMPONENT VALUE at the appliance terminal strip. -
Page 27: Section 8 - Wiring Diagrams
SECTION 8 - WIRING DIAGRAMS 8.1 EXTERNAL WIRING MECHANICAL CLOCK - RADIO FREQUENCY RECEIVER The appliance comes supplied with a time clock to allow opera- tion of the boiler via the mode selector switch. If external controls are to be added to the system, they must be connected to the appliance as shown in the following diagrams. - Page 28 FUNCTIONAL DIAGRAM Fig. 41 NOTE: L-N-E connection is advisable...
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Page 29: Section 9 - Lpg Instructions
SECTION 9 - LPG INSTRUCTIONS 9.1 RELATED DOCUMENTS BS 5440 PARTS 1 & 2 FLUES & VENTILATION REQUIREMENTS BS 5449 PART 1 FORCED CIRCULATION OF HOT WATER SYSTEMS BS 5482 PART 1 DOMESTIC BUTANE & PROPANE GAS BURNERS IN PERMAMENT DWELLINGS BS 5546 INSTALLATION OF GAS HOT WATER SUPPLIES FOR DOMESTIC PURPOSES BS 6798... -
Page 30: Commissioning Checklist
COMMISSIONING: CO AND COMBUSTION RATIO CHECK BEFORE CO AND COMBUSTION RATIO CHECK NOTE The installation instructions should have been followed, gas type verified and gas supply pressure/rate checked as required The air/gas ratio valve is factory-set and must not be prior to commissioning. -
Page 31: Benchmark
Benchmark Commissioning and Servicing Section It is a requirement that the boiler is installed and commissioned to the manufacturers instructions and the data fields on the commissioning checklist completed in full. To instigate the boiler guarantee the boiler needs to be registered with the manufacturer within one month of the installation. - Page 32 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. Failuretoinstallandcommissionaccordingtothemanufacturer’sinstructionsandcompletethisBenchmarkCommissioningChecklistwillinvalidatethe warranty.Thisdoesnotaffectthecustomer’sstatutoryrights.
- Page 33 SERVICE RECORD It is recommended that your heating system is serviced regularly and that the appropriate Service Interval Record is completed. Service Provider BeforecompletingtheappropriateServiceRecordbelow,pleaseensureyouhavecarriedouttheserviceasdescribedinthemanufacturer’sinstructions. Alwaysusethemanufacturer’sspecifiedsparepartwhenreplacingcontrols. SERVICE 01 SERVICE 02 Date: Date: Engineername: Engineername: Companyname: Companyname: TelephoneNo: TelephoneNo: GassaferegisterNo: GassaferegisterNo: Atmax.rate: COppm AND CO ²...
- Page 36 Registered address: Vokèra Ltd Borderlake House Unit 7 Riverside Industrial Estate London Colney Herts AL2 1HG enquiries@vokera.co.uk www.vokera.co.uk www.vokera.ie Sales, General Enquires T 0844 391 0999 F 0844 391 0998 Vokèra Ireland West Court, Callan Co Kilkenny T 056 7755057 F 056 7755060 Vokèra Limited reserve the right to change specification without prior notice...
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