Riello Vokera UNICA MAX Series User Instructions
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Riello Vokera UNICA MAX Series User Instructions

Riello Vokera UNICA MAX Series User Instructions

High efficiency system boiler
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UNICA MAX
High efficiency system boiler
Users Instructions
Installation &
Servicing
Instructions
UNICA MAX 20S NG G.C. N° 41-364-13
UNICA MAX 30S NG G.C. N° 41-364-14
UNICA MAX 20S LPG G.C. N° 41-364-15
UNICA MAX 30S LPG G.C. N° 41-364-16
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 1 UNICA MAX High efficiency system boiler Users Instructions Installation & Servicing Instructions UNICA MAX 20S NG G.C. N° 41-364-13 UNICA MAX 30S NG G.C. N° 41-364-14 UNICA MAX 20S LPG G.C. N° 41-364-15 UNICA MAX 30S LPG G.C. N° 41-364-16 THESE INSTRUCTIONS TO BE RETAINED BY USER...

  • Page 2: Table Of Contents

    1. THINGS YOU SHOULD KNOW ........... 2 SECTION 5 - INSTALLATION ............27 2. GETTING STARTED ..............5 SECTION 6 - COMMISSIONING ........... 32 3. HOW TO..................10 SECTION 7 - SERVICING INSTRUCTIONS ........42 4. WHAT IF ..................10 SECTION 8 - CHECKS, ADJUSTMENTS AND FAULT FINDING ..
  • Page 3 FROST PROTECTION SYSTEM APPLIANCE STATUS INDICATORS The UNICA MAX is equipped with a built-in frost protection Your appliance incorporates the REC10H UI (User Interface), system, this enables the boiler to over-ride the time controls that displays information on appliance status and condition. –...
  • Page 4 1.11 USER FUNCTIONS PLANT 18/05/2021 12:17 1.3 bar MENU STATE °C INFO HOT WATER TEMPERATURE 1 MENU DEFAULT VALUE FACTORY MINIMUM MAXIMUM ACCESS LEVEL VALUE VALUE NOTES MENU SETTINGS USER TIME & DATE USER DAYLIGHT SAVINGS TIME FUNCTION ACTIVE FUNCTION NOT ACTIVE FUNCTION ACTIVE USER LANGUAGE...

  • Page 5: Getting Started

    2. GETTING STARTED BEFORE SWITCHING ON STATE This function can be used to set these operating modes. Before switching the appliance on, please familiarise yourself with: Select STATE BOILER or DHW (in WATER TANK - how to isolate the appliance from the gas, water, and electricity configuration) or MAIN ZONE or HEAT PUMP (if present).
  • Page 6 MAIN ZONE Select STATE MAIN ZONE to set the main zone’s status, HEATING by choosing one of the following options: THE PARAMETER WILL BE CHANGED - if the embedded time clock is disabled (default): 78,0 - ZONE ON: boiler responds to heating request °C - ZONE OFF: boiler does not respond to any request for CONFIRM...
  • Page 7 The “ok” key is inactive. The “back” key allows you to return OPTIMUM EFFICIENCY to the initial screen. In the absence of additional zones or if the : 30 days screed heater function is not operating, the relative information : 30 days will not be displayed.
  • Page 8 In order to confirm that the operation has been completed Confirm or cancel the selection made. successfully, the display will show the table with the new time In order to confirm that the operation has been completed successfully, the display will show the table with the selected frame flashing.
  • Page 9 For fault E041 For fault E091 If the pressure drops below the safety threshold of 0.3 bar the The boiler has an auto-diagnostic system which, based on boiler displays the fault code “E041 - WATER TRANSDUCER the total number of hours in certain operating conditions, can LOAD THE SYSTEM”...

  • Page 10: How To

    - DHW frost-protection: the function starts if the temperature 3. HOW TO... measured by the DHW sensor falls below 5°C. A heat request is generated in this phase with the ignition of the burner at HOW TO TOP-UP THE SYSTEM minimum output, which is maintained until the outlet water temperature reaches 55°...
  • Page 11 INSTALLATION AND SERVICING INSTRUCTIONS INTRODUCTION These appliances are designed for use with a sealed system All installers are asked to follow the Benchmark Scheme by adhering to the Code of Practise, details of which can be only; consequently they are not intended for use on open obtained from www.benchmark.org.uk.

  • Page 12: Section 1 - Design Principles And Operating

    1. SECTION - DESIGN PRINCIPLES AND OPERATING SEQUENCE 1.1 PRINCIPLE COMPONENTS • A fully integrated electronic control board featuring electronic temperature control, anti-cycle control, pump over-run, self- diagnostic fault indicator, full air/gas modulation • Stainless-steel heat exchanger • Electronic ignition with flame supervision •...

  • Page 13: Section 2 - Technical Data

    2. SECTION - TECHNICAL DATA Central Heating UNICA MAX 20S UNICA MAX 30S Heat input (kW) 20.00*** 32.00 (***) The rated heat input with gas G20.2 (I2Y20) undergoes a reduction: Qn heating = 18.9 kW Maximum heat output (kW) 60/80°C 19.50 31.23 Minimum heat output (kW) 60/80°C...
  • Page 14 UNICA UNICA Parameter Symbol Unit MAX 20S MAX 30S Seasonal space heating energy efficiency class Water heating energy efficiency class Rated heat output Pnominal Seasonal space heating energy efficiency ηs Useful heat output At rated heat output and high-temperature regime (*) 19,5 31,2 At 30% of rated heat output and low-temperature regime (**)
  • Page 15 2.13 Residual head of the circulator 3 - CIRCULATOR IN MAXIMUM FIXED SPEED MODE (DUTY CYCLE PUMP = 1) The boiler is equipped with a high efficiency modulating circula- In this mode the circulator, when activated, always works at ma- tor already connected hydraulically and electrically, the availa- ximum speed.
  • Page 16 Fig. 5 Location Minimum distance Below an opening (window, air-brick, etc.) 300 mm Above an opening (window, air-brick, etc.) 300 mm To the side of an opening (window, air-brick, etc.) 300 mm Below gutter, drain-pipe, etc. 25 mm Below eaves 25 mm Below balcony, lowest point of carport roof, etc.

  • Page 17: Section 3 - Control Panel (Rec10)

    3. SECTION - CONTROL PANEL (REC10H) The REC10 is a fully functional UI (User Interface) that acts as a visual reference for the appliance and system status; and can also be used to view, input and adjust relevant system parameters and functions. The centre of the UI will normally display the current operating temperature (according to the mode of operation);...
  • Page 18 The display of the REC10H control panel is equipped with the new “Color Bar” that rapidly informs the user about the boiler operation. The operating states and the alarms are grouped by 4 colours: - GREEN: normal operation, the system is serving domestic hot water/heating requests or else automatic functions like, for example, anti-legionella, antifreeze, flue cleaning, etc..
  • Page 19 3.1 Structure of the REC10CH MENU DEFAULT VALUE FACTORY MINIMUM MAXIMUM ACCESS LEVEL VALUE VALUE NOTES VALUE MENU SETTINGS USER TIME & DATE USER DAYLIGHT SAVINGS TIME FUNCTION ACTIVE FUNCTION NOT ACTIVE FUNCTION ACTIVE USER LANGUAGE ENGLISH / ITALIANO / ... USER BACKLIGHT 5 min...
  • Page 20 DEFAULT VALUE FACTORY MINIMUM MAXIMUM ACCESS LEVEL VALUE VALUE NOTES VALUE MENU SP INCR LOW TEMP 0°C 0°C 6°C SERVICE DECR COOLING SP 0°C 0°C 10°C SERVICE PUMP DUTY CYCLE INSTALLER RESET CH TIMERS FUNCTION NOT ACTIVE FUNCTION NOT ACTIVE FUNCTION ACTIVE INSTALLER INSTALLER: only in “heating only”...
  • Page 21 DEFAULT VALUE FACTORY MINIMUM MAXIMUM ACCESS LEVEL VALUE VALUE NOTES VALUE MENU INSTALLER WATER TANK REMOVE WATER TANK INSTALLER INSTALLER: only if “only heating” WATER TANK TYPE confi guration SERVICE: only if “only heating” TANK FROST PROTECT 7°C 0°C 100°C confi...
  • Page 22 DEFAULT VALUE FACTORY MINIMUM MAXIMUM ACCESS LEVEL VALUE VALUE NOTES VALUE MENU BOOSTER DELTA TEMP 5°C 1°C 20°C INSTALLER INSTALLER OAT SENSOR TYP MINIMUM PUMP SPEED 100% INSTALLER MAXIMUM PUMP SPEED 100% 100% INSTALLER ENABLE ERROR HISTORY SERVICE ERROR HISTORY INSTALLER INSTALLER: OFF state and SCREED HEATING...
  • Page 23 3.2 Access to TECHNICAL PARAMETERS MENU PLANT 09/04/2021 12:17 09/04/2021 12:17 1.3 bar MENU STATE INSERT PASSWORD SETTINGS °C 5 sec INFO SELECT OPTION AIR PURGING CYCLE IN PROGRESS 3.3 Access to SETTINGS - TECHNICAL - INFO SYSTEM menu TECHNICAL MENU PARAMETERS INSTALLATION...

  • Page 24: Section 4 - General Requirements (Uk)

    4. SECTION - GENERAL REQUIREMENTS (UK) BS 5440 PART 1 FLUES BS 5440 PART 2 FLUES & VENTILATION BS EN 12828 DESIGN FOR WATER-BASED HEATING SYSTEMS BS 6798 INSTALLATION OF BOILERS OF RATED INPUT NOT EXCEEDING 70kW BS 6891 LOW PRESSURE INSTALLATION PIPES 4.4 FLUE SYSTEM This appliance must be installed by a competent person in accordance with the Gas Safety (Installation &...

  • Page 25: Section 4A - General Requirements (Eire)

    4.6.8 FREQUENT FILLING Fig. 6 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 appliance to ensure all aspects of the system are capable of valve connection withstanding pressures up to at least 3 bar.
  • Page 26 4A.4 FLUE SYSTEM 4A.7 ELECTRICAL SUPPLY The terminal should be located where the dispersal of combustion The appliance is supplied for operation on 230V @ 50Hz electrical products is not impeded and with due regard for the damage supply; it must be protected with a 3-amp fuse (supplied). The and discoloration that may occur to building products located method of connection to the mains electricity supply must allow nearby.

  • Page 27: Section 5 - Installation

    5. SECTION - INSTALLATION 5.5 FITTING THE FLUE NOTE: please refer to section 4, section 4.1 and use the ap- propriate PPE when carrying out any of the actions or proce- This appliance incorporates a ‘click-fit’ flue connection at the dures contained within this section.
  • Page 28 Attach the flue bend to the flue terminal ensuring that both pipes bends & extensions have push-fit connections, care should be taken to ensure that the correct seal is made when assembling are fully inserted into the flue bend. Insert the assembled flue the flue system.
  • Page 29 5.6 CONNECTING THE GAS AND WATER (fig. 20) vertical The appliance is supplied with an accessory pack that includes connection service valves. The service valves are of the compression type. The accessory pack contains sealing washers’ etc, for use with the service valves.
  • Page 30 BS6798 provides comprehensive instruction and advice on all permissible condensate disposal methods; notwithstanding this, it is essential that the following is strictly adhered to: - use only plastic drainage pipe (minimum OD of 21.5mm) - horizontal runs must incorporate a minimum 45mm fall per metre, away from the appliance - external pipework and/or pipework in unheated areas, must have a minimum OD of 32mm and be insulated with Class-O...
  • Page 31 5.7.3 CONNECTING A 230V SUPPLY TO THE REMOVAL OF SIDE PANEL/S Remove the front cover as indicated above: APPLIANCE PCB - locate and remove the 2-screws that secure the side panel WARNING to the appliance Isolate the appliance from the electrical supply before - gently prise the side panel forward to release it from the carrying out this procedure.

  • Page 32: Section 6 - Commissioning

    6. SECTION - COMMISSIONING NOTE: please refer to section 4, section 4.1 and use the ap- TIME & DATE propriate PPE when carrying out any of the actions or proce- dures contained within this section. ENTER TIME AND DATE 6.1 PRELIMINARY CHECKS Before starting up the boiler, check: - confirm via the appliance data badge, that the appliance is 18 / 11 / 2013...
  • Page 33 - CONFIG OTBUS: this parameter is used to enable the PARAMETERS remote control of the boiler via an OpenTherm device: 1 = FACTORY VALUE. OTBus function enabled. The ANTI-CYCLE FUNCTION message “OPEN THERM CONNECTED” will appear on RESET CH TIMERS the display, when an OTBus device connected.
  • Page 34 6.2.4 EMBEDDED CLOCK HEATING SCHEDULE the last 7 days - in case it is set to start once a week. If the function is activated, it is performed every day at 3:00 a.m. if When the embedded clock is enabled (POR=1 - see above), a set to start every day, or on Wednesdays at 3:00 a.m.
  • Page 35 HEAT REQUEST FROM THERMOSTAT (Programmable Timer) THERMOREGULATION CURVES In this case the outlet setpoint depends on the outdoor temperature for obtaining a reference ambient temperature of 20°C. There are 2 parameters that compete to calculate the output setpoint: T HT - slope of the compensation curve (KT) - offset on the reference ambient temperature.
  • Page 36 6.4 ADJUSTING THE HEATING WATER combustion TEMPERATURE WITHOUT AN orange analysis button OUTDOOR TEMPERATURE SENSOR F.S. CONNECTED When there is no outdoor temperature sensor, the boiler operates at a fixed-point, the HEATING setpoint in this case X3 X7 can be set selecting SET on the main screen of the REC10 and selecting the desired value within the range [40°C - 80.5°C] for high temperature systems or [20°C - 45 °C] for low temperature systems (default is high temperature).
  • Page 37 PLANT TIME TEMPERATURE 18/05/2013 12:17 20°C 1.3 bar MENU STATE 22°C 24°C °C 26°C 28°C 30°C INFO HOT WATER TEMPERATURE 32°C During any heating request, the appliance will attempt to 35°C 35°C reach and maintain the selected set point, at which point it will 30°C modulate the fan speed to maintain the set outlet temperature.
  • Page 38 At this point, if the correct operating conditions have been PLANT STATE BOILER 09/04/2021 12:17 restored, the boiler will restart automatically. MENU 1.3 bar STATE There are a maximum of 3 consecutive attempts at a release BOILER by the REC10, should all 3 attempts at reset fail, the appliance HOT WATER ONLY °C will require to be isolated briefly from the electrical supply...
  • Page 39 Boiler faults list ERROR DESCRIPTION OF ERROR MESSAGE CODE ALARM TYPE E010 flame lockout/ACF electronic fault final E011 extraneous flame temporary E020 limit thermostat final E030 fan fault final E040 water transducer - check system water pressure final E041 water transducer - check system water pressure temporary E042 water transducer fault...
  • Page 40 6.15 WATER TANK CONFIGURATION TECHNICAL PARAMETERS The boiler leaves the factory pre-configured for manag- AIR PURGING CYCLE ing a water tank with a thermostat (water tank type pa- EXHAUST PROBE RESET rameter = 0 ). ERROR HISTORY To modify the configuration of the water tank: - select TECHNICAL WATER TANK COMBUSTION MONITORING...
  • Page 41 Panel cleaning must be carried out only with soapy Maintenance of the combustion control system water. Maintenance electrode The detection electrode/ionization sensor has an important Cleaning the siphon function in the boiler ignition phase and in the maintenance of - Disconnect the tubes (A) and (B), remove the clip (C) and optimal combustion;...

  • Page 42: Section 7 - Servicing Instructions

    7. SECTION - SERVICING INSTRUCTIONS GENERAL UNSCHEDULED MAINTENANCE The appliance incorporates software that monitors the Once the appliance has been serviced, the benchmark Service Record must be completed. operating conditions of the appliance, and will record any ‘unusual usage conditions’ that will affect the requirement to For UK only remove and clean the burner/heat exchanger assembly.

  • Page 43: Section 8 - Checks, Adjustments And Fault Finding

    8. SECTION - CHECKS, ADJUSTMENTS AND FAULT FINDING NOTE: please refer to section 4, section 4.1 and use the ap- will begin the modulation phase whereby the fan and gas valve propriate PPE when carrying out any of the actions or proce- will continuously modulate to maintain the set-point.
  • Page 44 8.5.3 POLARITY CHECK - the UI screen will display the firmware version – press any key to continue With the appliance connected to the electrical supply and using - select language (ENGLISH) a suitable multimeter, carry out the following voltage tests: - enter the time and date •...
  • Page 45 8.11 Typical connection from remote room NOTE After a system reset where the configuration selection is thermostat and clock – connected to the ‘new’, carry out a check on the various (applicable) installation BE11 parameters to ensure that the ‘new’ configuration meets the requirements of the system.
  • Page 46 S-plan PROGRAMMER BE11 CONNECTIONS BE11 black black Hot Water Heating BOILER F=3.15A F 230 V auxiliary blue brown ROOM THERMOSTAT CYLINDER Fuse 3 AMP THERMOSTAT 2 PORT VALVE 2 PORT VALVE HOT WATER HEATING Y-plan PROGRAMMER BE11 CONNECTIONS BE11 black black Hot Water Heating...
  • Page 47 FUNCTIONAL DIAGRAM...

  • Page 48: Section 9 - Lpg Instructions

    9. SECTION - LPG INSTRUCTIONS 9.1 RELATED DOCUMENTS BS 6798 INSTALLATION OF BOILERS OF RATED INPUT NOT EXCEEDING 60 kW BS EN 12828 DESIGN FOR WATER-BASED HEATING SYSTEMS BS 5440 PARTS 1 & 2 FLUES & VENTILATION BS 6891 SPECIFICATION FOR THE INSTALLATION AND MAINTENANCE OF LOW PRESSURE GAS INSTALLATION PIPEWORK OF UP TO 35 MM 9.2 TECHNICAL DATA Gas Pressures...

  • Page 49: 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 50: Benchmark

    Benchmark Commissioning & Warranty Validation Service Record It is a requirement that the boiler is installed and commissioned to the manufacturers’ To instigate the boiler warranty the boiler needs to be registered with the manufacturer within one month of the installation. The warranty rests with the end-user (consumer), and they should be made aware it is ultimately their responsibility to register with the manufacturer, within the allotted time period.
  • Page 51 GAS BOILER SYSTEM COMMISSIONING CHECKLIST & WARRANTY VALIDATION RECORD Address: Boiler make and model: Boiler serial number: Commissioned by (PRINT NAME): Gas Safe registration number: Company name: Telephone number: Company email: Company address: Commissioning date: Heating and hot water system complies with the appropriate Building Regulations? Time, temperature control and boiler interlock provided for central heating and hot water Boiler Plus requirements (tick the appropriate box(s)) Weather compensation...
  • Page 52 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 SERVICE/INTERIM WORK ON BOILER SERVICE/INTERIM WORK ON BOILER Date:...
  • Page 53 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 SERVICE/INTERIM WORK ON BOILER SERVICE/INTERIM WORK ON BOILER Date:...

  • Page 54: Vokèra Warranty Terms And Conditions

    Vokèra Warranty Terms and Conditions Vokèra Ltd offer customers the comfort of a parts and labour warranty repair service subject to the following terms and conditions. Vokèra Ltd only obligation under the guarantee shall be to repair or replace the faulty appliance at Vokèra Ltd discretion.
  • Page 55 Health & Safety: Engineers will only attend to boiler products where it is considered by the engineer that the installation does not pose a risk to health and safety. A permanently fixed access ladder must service installations in lofts or attics. Adequate lighting and permanently fixed flooring must also be available.
  • Page 56 RANGE RATED - EN 15502 The max CH input of this boiler has been adjusted to_____ kW, equivalent to _____ rpm max CH fan speed. Date___/____/____ Signature _____________________ Boiler serial number _____________________ Registered address: Vokèra Ltd Borderlake House Unit 7 Riverside Industrial Estate London Colney Herts AL2 1HG www.vokera.co.uk...

This manual is also suitable for:

Vokera unica max 20s ng g.c.Vokera unica max 30s ng g.c.Vokera unica max 20s lpg g.c.Vokera unica max 30s lpg g.c.41-364-1341-364-14 ... Show all

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