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42

GENERAL

Once the appliance has been serviced, the benchmark Service 

Record must be completed.

For UK only

It is important that the Benchmark Service Record is correctly 

completed and handed to the user. Failure to install and 

commission the appliance to the manufacturers instructions 

will invalidate the warranty.

To  ensure  the  continued  safe  and  efficient  operation  of  the 

appliance, it is recommended that it is checked and serviced 

at regular intervals. To ensure correct and safe operation of the 

appliance, it is essential that any worn or failed component be 

replaced only with a 

genuine Vokèra spare part

. It should be 

remembered that although certain generic components may 

look  similar,  they  will  be  specific  to  an  individual  appliance 

or product range. Use of non-genuine Vokèra spare parts 

could invalidate your warranty and may pose a potential 

safety hazard. The frequency of servicing will depend upon 

the particular installation conditions, but in general, once per 

year should be sufficient. It is the law that any servicing work 

is carried out by competent person such as a Vokèra engineer, 

an approved service agent, British Gas, GAS SAFE registered 

personnel or other suitably qualified personnel. The following 

instructions apply to the appliance and its controls, but it should 

be remembered that the central heating and the domestic hot 

water systems would also require attention from time to time.

ROUTINE ANNUAL MAINTENANCE

The appliance incorporates many ‘state-of-the-art’ 

components that are either ‘solid-state’ or are regarded as 

‘non-serviceable’ items. As a consequence, the requirements 

for routine annual maintenance are focussed upon:

1.  ensuring that the appliance and flue system are in a safe 

condition

2.  ensuring that the appliance is operating safely

3. ensuring that the appliance is performing to its design 

specification.

When the appliance has been installed to within the minimum 

stated clearances; the appliance layout is such that it enables 

routine annual maintenance to be carried out entirely from the 

front of the appliance.

NOTE

Any noticeable defect or deterioration on or within the 

appliance and flue system that impacts or affects the above 

requirements; will warrant further diagnosis and repair, which 

may result in the replacement of components.

Specific advice and instruction on the removal and replacement 

of component parts of the appliance can be found online using 

the adjacent QR code or by visiting our website.

ROUTINE ANNUAL MAINTENANCE REQUIREMENTS

1. Check the operation of the appliance in both the heating 

and hot water modes and ensure the performance is in line 

with the appliance specification.

2.  Using the UI menu, navigate to the alarms history and check 

for any recent alarm events (menu string is: MENU 

 

SETTINGS 

 TECHNICAL 

 ERROR HISTORY).

  Refer to the alarm/fault codes description chart for further 

information.

3. Remove the front cover (see section 6.12) and visually 

inspect the internal components and electrical wiring for 

any defect or deterioration.

4. Visually check for any dirt or debris within the condensate 

trap (the trap is translucent and can be checked visually).

5. Replace the front cover as detailed in section 6.12 taking 

notice of the importance of ensuring that the effectiveness 

of the – front cover – seals are not compromised.

6. Carry out a combustion analysis as detailed in section 

6.12.

7.  Visually check the entire flue system for any damage, defect, 

or deterioration.

NOTE

In order to access the ‘alarms history’ it is necessary to access 

the password protected settings. Refer to section 8 for further 

details.

7.  SECTION - SERVICING INSTRUCTIONS

UNSCHEDULED MAINTENANCE

The appliance incorporates software that monitors the 

operating conditions of the appliance, and will record any 

‘unusual usage conditions’ that will affect the requirement to 

remove and clean the burner/heat exchanger assembly. When 

the ‘unusual usage’ hours reach a pre-determined threshold, 

the appliance will signal – via alarm code E091 – that the heat 

exchanger requires to be cleaned.

REPLACEMENT OF COMPONENTS

Although it is anticipated that this appliance will provide years of 

trouble-free service and outstanding performance; the lifespan of 

any component will be determined by factors such as operating 

conditions and usage levels. Should the appliance develop a 

fault, the fault-finding section of this manual will greatly assist 

in determining the cause; however further advice can be sought 

from the Vokera Technical Help-line. Remember always to use 

only genuine Vokera spare parts.

COMPONENT REMOVAL PROCEDURE

To remove/replace a component, access to the interior of the 

appliance is usually essential.

Always

 isolate the appliance from the electrical supply – and 

if necessary remove the fuse.

•  Close all service valves if any hydraulic and/or gas carrying 

item is to be removed.

• Remove the front cover – and where necessary or 

convenient – the side panels of the appliance as detailed in 

5.7.1.

• If required, drain the primary circuit via the drain valve 

(located adjacent to the diverter valve) using the tubing 

supplied with the appliance.

•  If required, drain the secondary circuit via the available DHW 

outlets.

NOTE

When removing a hydraulic component, ensure that some 

water absorbent cloths are available to catch any residual 

water that may drip from the appliance and/or the removed 

component.
When the appliance has been installed to within the stated 

minimum clearances; it may be necessary to remove 

adjacent components in order to facilitate access to a specific 

component.
Carry out the relevant elements of the commissioning 

procedure (section 8) after replacing a component.

ALWAYS TEST FOR GAS TIGHTNESS IF ANY GAS 

CARRYING COMPONENT HAS BEEN DISTURBED, 

REMOVED, OR REPLACED.
WHEN REPLACING THE SIDE PANELS AND/OR THE 

FRONT COVER, ENSURE THE ROOM SEALED INTEGRITY 

OF THE APPLIANCE HAS NOT BEEN COMPROMISED – 

REFER TO 5.7.1.

To obtain detailed specific information and instructions on how 

to remove and replace specific components, please access 

our online resources by logging on to our website.

www.vokera.co.uk

www.vokera.ie

Summary of Contents for 41-364-13

Page 1: ...d member of the Benchmark scheme which aims to improve the standards of installation and commissioning of domestic hot water systems in the UK UNICA MAX 20S NG G C N 41 364 13 UNICA MAX 30S NG G C N 4...

Page 2: ...s 1 2 ELECTRICAL SUPPLY Please ensure that this appliance has been properly connected to the electrical supply by means of a double pole isolator or un switched socket and that the correct size of fus...

Page 3: ...shing This icon indicates that the circuit for domestic hot water production is enabled When a domestic hot water request is in progress the icon flashes default value parameter water tank type 0 If w...

Page 4: ...OP TIME 20 00 00 00 23 59 USER only if NIGHT REDUCTION active 1 MENU DEFAULT VALUE FACTORY SET MINIMUM VALUE MAXIMUM VALUE ACCESS LEVEL NOTES MENU SETTINGS USER TIME DATE USER DAYLIGHT SAVINGS TIME FU...

Page 5: ...essing the ok and back keys it will be possible to select the other zones in this sequence only if added and configured with the REC10 H PLANT MAIN ZONE ZONE 1 ZONE 2 The TIME AND DATE DAYLIGHT SAVING...

Page 6: ...and confirm Once the selection is confirmed the display returns to the SET screen If the selection is cancelled or the back key is pressed you return to the previous SET screen SET HEATING 78 0 C SET...

Page 7: ...t time is replaced with the boiler flow temperature and turns on the icon concerning the type of request in progress A system efficiency indicator is also displayed at the top of the screen HIGH EFFIC...

Page 8: ...er to confirm that the operation has been completed successfully the display will show the table with the selected time frame flashing just before deleting it from the table START MAIN THURSDAY ARE YO...

Page 9: ...l E090 fault flue gases probe flue gases overtemperature probe temporary final E091 clean primary heat exchanger temporary E099 reset attempts exhausted boiler blocked definitive not resettable water...

Page 10: ...phase with the ignition of the burner at minimum output which is maintained until the outlet water temperature reaches 35 C DHW frost protection the function starts if the temperature measured by the...

Page 11: ...ous horizontal or vertical applications These appliances are designed for use with a sealed system only consequently they are not intended for use on open vented systems This booklet is an integral pa...

Page 12: ...abled Ignitionissensedbytheelectroniccircuittoensureflamestability at the burner Once successful ignition has been achieved the electronic circuitry increases the gas rate to 75 for a period of 15minu...

Page 13: ...ance for the insertion of a FGA probe This can be reduced to 4mm if a removal panel enables the required 100mm When installed in a cupboard this dimension can be reduced to 4mm provided that the requi...

Page 14: ...ime P4 19 5 31 2 kW At 30 of rated heat output and low temperature regime P1 6 5 10 5 kW Useful efficiency At rated heat output and high temperature regime 4 87 8 87 9 At 30 of rated heat output and l...

Page 15: ...CULATOR WITH CONSTANT T MODE 2 DUTY CYCLE PUMP 40 In this mode the installer sets the T value to be maintained between flow and return e g by entering a value 10 the circu lator speed will change to o...

Page 16: ...ning in the car port into the building 1200 mm M Vertically from a terminal on the same wall 1500 mm N Horizontally from a terminal on the same wall 300 mm P From a structure to the side of the vertic...

Page 17: ...ne the number 1 or 2 is flashing Only if heat pump is present This icon indicates that cooling is active in the SUMMER state If a cooling request from the main zone is in progress the icon is flashing...

Page 18: ...he signal on the main screen corresponds to the highest priority in the following ascending order Grey Green Yellow and Red The configuration MENU is organised with a multi access level tree structure...

Page 19: ...I PROPORTIONAL 5 0 99 SERVICE only mixing zones with ACTUATION BE16 PI INTEGRAL 10 0 99 SERVICE only mixing zones with ACTUATION BE16 VALVE RUN 120 sec 0 sec 120 sec SERVICE only mixing zones with ACT...

Page 20: ...IENT PROBE or REC10CH AMBIENT INFLUENCE 10 0 20 INSTALLER if request type AMBIENT PROBE or REC10CH OFFSET 20 C 20 C 40 C INSTALLER if request type AMBIENT PROBE or REC10CH COOLING 18 C 4 C 20 C INSTAL...

Page 21: ...SABLE COOLING FUNCTION NOT ACTIVE FUNCTION ACTIVE FUNCTION NOT ACTIVE INSTALLER USE FOR DHW DON TUSE FOR DHW DHW FUNCTION NOT ACTIVE DHW FUNCTION ACTIVE DHW FUNCTION NOT ACTIVE INSTALLER if BE17 prese...

Page 22: ...E FUNCTION INSTALLER ACTIVATE FUNCTION INSTALLER FUNCTION SETTINGS SERVICE TFMIN 20 C 15 C 30 C SERVICE TFMAX 35 C 30 C 55 C SERVICE COMBUSTION MONITORING SERVICE GAS TYPE NATURAL GAS NATURAL GAS LPG...

Page 23: ...CH TIMERS DHW THERMOSTAT PARAMETERS INSTALLER PUMP DUTY CYCLE INSTALLATION WEATHER COMPENSATION RANGE RATED TECHNICAL INSTALLER PARAMETERS CALIBRATION 8 FRI 09 04 2021 12 17 MENU INFO SET AIR PURGING...

Page 24: ...rves more than one appliance it must be ensured that an adequate supply is maintained to each appliance when they are in use at the same time NOTE It is recognised that pressure loss through the gas c...

Page 25: ...S 813 4A 1 RELATED DOCUMENTS The installation of this boiler must be in accordance with the relevant requirements of the local building regulations the current ETCI National Rules for Electrical Insta...

Page 26: ...provided see fig 6 You shouldensurethismethodoffillingcomplieswiththelocalwater authority regulations 4A 6 7 LOW PRESSURE SEALED SYSTEM An alternative method of filling the system would be from an in...

Page 27: ...ystem or download the instructions from the Vokera website The appliance flue outlet elbow can be rotated through 360 on its vertical axis In addition the flue may be extended from the outlet elbow in...

Page 28: ...hat all seals are located properly You must ensure that the entire flue system is properly supported and connected Seal the flue assembly to the wall using cement or a suitable alternative that will p...

Page 29: ...hers before tightening the valve to the appliance NOTE It will be necessary to hold the valve with one spanner whilst tightening with another Gas cock C H flow valve C H return valve Fig 20 5 6 1 GAS...

Page 30: ...ust be 3 core flexible sized 0 75mm to BS 6500 or equivalent Wiring to the appliance must be rated for operation in contact with surfaces up to 90 C ModBus 485 Connection CE4 Carry out the connections...

Page 31: ...e the fly lead with an alternative method of connection to the electrical supply 5 7 3 CONNECTING A 230V SUPPLY TO THE APPLIANCE PCB WARNING Isolate the appliance from the electrical supply before car...

Page 32: ...AND DATE Navigate with the keys to set the values 12 17 ENTER TIME AND DATE TIME DATE USE THE ARROWS TO MODIFY 18 11 2013 Note it is possible to change the TIME and DATE DAYLIGHT SAVINGS TIME setting...

Page 33: ...tantaneously interrupted 6 2 2 CONFIGURATION OF THE ZONE It is possible to customise the management of the heating zone by accessing the ZONES MANAGER menu Access to menu TECHNICAL INSTALLATION ZONES...

Page 34: ...N OFF timings for each day of the week operating mode AUTO if necessary the default heating schedule can be changed according to the User s needs Refer to 2 10 TIME SCHEDULE User section for detailed...

Page 35: ...ot produce a switch off but a reduction parallel translation of the climatic curve on NIGHT level 16 C Also in this case the user can indirectly modify the value of the HEATING setpoint inserting once...

Page 36: ...alue 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 DHW SET HEATING 6 5 ADJUSTING THE HEATING WATER TEMPERATURE WITH AN...

Page 37: ...the table on the side Accessing the INFO menu from the main page of the REC10 it is possible to display the TIME FUNC SCREED HEATING value regarding the number of hours since the start of the function...

Page 38: ...present Reset function In order to reset the boiler s operation in the event of a fault it is necessary to access the fault description screen If the lockout is of a non volatile type that requires a...

Page 39: ...rm E097 iono alarm E085 combustion fault high CO These are temporary alarms that if they occur several times in an hour they become definitive the last error to occur is displayed and is followed by a...

Page 40: ...lectronics boards AKM and REC 10 MASTER will require the re programming of these parameters Set SERVICE password Select TECHNICAL COMBUSTION MONITORING AIR PURGING CYCLE PARAMETERS EXHAUST PROBE RESET...

Page 41: ...f replacement it is necessary to always ensure that it is correctly positioned and to strictly observe the reference shown in the figure detector electrode ionisation sensor flame ignition electrode a...

Page 42: ...ct the internal components and electrical wiring for any defect or deterioration 4 Visually check for any dirt or debris within the condensate trap the trap is translucent and can be checked visually...

Page 43: ...nt hysterisis the burner will re light NOTE Ifburnerignitionisnotdetectedatthefirstattempt theappliance will repeat the ignition sequence another two times 3 times in total before going to lockout Whe...

Page 44: ...continuity 8 7 APPLIANCE STATUS AND FAULT CODES When the boiler detects a temporary fault condition the appropriate code is shown If when the fault is final the pump will perform 30 to 60 second post...

Page 45: ...iance The UNICA MAX S system boilers incorporate an internal relay that enables a direct switched 230v supply to be used to generate a heating or hot water request from an external control system such...

Page 46: ...T Pressure transducer MOD Modulator F Lv Fan signal control M GREY BROWN BLUE ORANGE ORANGE BLUE BROWN GREY M N L 230 V Fuse 3 AMP NO NC COM NO NC COM ROOM THERMOSTAT CYLINDER THERMOSTAT M NO NC COM...

Page 47: ...SC2 blue S E brown yellow green N F X6 3 1 red 24 Vdc yellow B orange A black red 24 Vdc yellow B orange A black REC black orange A yellow B red 24 Vdc A B CE4 removable connector positioned under she...

Page 48: ...E password 3 Select TECHNICAL COMBUSTION MONITORING GAS TYPE LPG ERROR HISTORY EXHAUST PROBE RESET AIR PURGING CYCLE PARAMETERS COMBUSTION MONITORING SERVICE TECHNICAL BOILER TYPE COMBUSTION OFFSET GA...

Page 49: ...h section 7 3 set boiler to operate at minimum rate to minimum load condition Allow sufficient time for combustion to stabilise YES I Is s C CO O 3 35 50 0p pp pm m a an nd d C CO O C CO O2 2 r ra at...

Page 50: ...turers recommendations at least annually This must be carried out by a competent Gas Safe registered engineer The service details should be recorded on the Benchmark Service and Interim Boiler Work Re...

Page 51: ...no what is the maximum central heating output selected kW Dynamic gas inlet pressure mbar C Central heating return temperature C System correctly balanced rebalanced Yes COMBINATION BOILERS ONLY Is t...

Page 52: ...eer name Company name Telephone No Gas Safe registration No Max rate CO ppm CO CO CO Min rate CO ppm CO CO CO undertaken in accordance with manufacturers instructions and readings are correct yes Gas...

Page 53: ...eer name Company name Telephone No Gas Safe registration No Max rate CO ppm CO CO CO Min rate CO ppm CO CO CO undertaken in accordance with manufacturers instructions and readings are correct yes Gas...

Page 54: ...missioning sheet RGII Installation Certificate ROI the warranty will commence from the date of manufacture as detailed on the appliance data plate 6 To qualify for the full term of warranty the boiler...

Page 55: ...dhered to f To any other costs or expenses caused by or arising as a result of the breakdown of a Vok ra Boiler g To any costs incurred during delays in fixing reported faults 10 We reserve the right...

Page 56: ...Ireland West Court Callan Co Kilkenny T 056 7755057 F 056 7755060 Vok ra Limited reserve the right to change specification without prior notice Consumers statutory rights are not affected Company Reg...

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