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43

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 5.7.1) 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 5.7.1 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 6.3) 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 47-364-61

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 High efficiency combi boiler UNICA MAX 35C NG G...

Page 2: ...d Your UNICA MAX boiler lights electronically and does not have a pilot light In the unlikely event of a fault developing with your boiler the supply of gas to the burner will be terminated automatica...

Page 3: ...rost protection function The pump anti lock 3 way valve and frost protection function remain active This icon indicates that WINTER mode has been selected HEATING function enabled If a heating request...

Page 4: ...0 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 FUNCTION ACTIVE FUNC...

Page 5: ...is related to the appliance No domestic hot water parameters can be set if MAIN ZONE 1 or ZONE 2 is selected 2 6 STATE This function can be used to set these operating modes Select STATE BOILER or MA...

Page 6: ...g it compared to that automatically calculated by the electronic board you can change the COOLING setpoint by choosing the desired comfort level 5 5 within the range Then you are asked to confirm the...

Page 7: ...Pressing ok the language selection is confirmed and the display returns to the initial screen Pressing back the system returns to the SETTINGS screen without changing the system s language BACKLIGHT t...

Page 8: ...30 18 00 END 08 30 14 00 22 30 USE THE ARROWS TO MODIFY DELETE This function serves to delete a time frame already present for the selected day START MAIN THURSDAY 07 30 11 30 18 00 END 08 30 13 30 22...

Page 9: ...t exchanger temporary E099 reset attempts exhausted boiler blocked definitive not resettable water pressure low verify the system pressure temporary water pressure high check system temporary boiler b...

Page 10: ...perature measured by the flow sensor drops below 5 C A heat request is generated in this phase with the ignition of the burner at minimum output which is maintained until the outlet water temperature...

Page 11: ...re designed for use with a sealed system only consequently they are not intended for use on open vented systems This booklet is an integral part of the appliance It is therefore necessary to ensure th...

Page 12: ...is a request for DHW via a hot water outlet or tap the pump and fan are started the fan speed will modulate until the correct signal voltage is received at the control PCB At this point an ignition se...

Page 13: ...MAX 35C UNICA MAX 40C Sides 2mm Top 100mm from casing or 25mm above flue elbow whichever is applicable Bottom 100mm Front 450mm It may be necessary to remove adjacent components if component removal r...

Page 14: ...Unit Seasonal space heating energy efficiency class A A Water heating energy efficiency class A A Rated heat output Pnominal 31 31 kW Seasonal space heating energy efficiency s 94 94 Useful heat outp...

Page 15: ...SPEED CIRCULATOR 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 ch...

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: ...l be flashing If there is a CH request from the additional zone 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 r...

Page 18: ...e 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: ...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 ACTUATION BE16 CLOSIN...

Page 20: ...est type TA and zone type HT 0 4 0 2 0 8 INSTALLER if EXTERNAL PROBE request type TA and zone type LT 2 0 1 0 5 0 INSTALLER if request type AMBIENT PROBE or REC10CH AMBIENT INFLUENCE 10 0 20 INSTALLER...

Page 21: ...LE 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 present...

Page 22: ...N 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 INSTALLER...

Page 23: ...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 CYCLE IN PROGRESS STATE 30 C 3 PLAN...

Page 24: ...ly serves 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...

Page 25: ...BLE SURFACE Theappliancecanbemountedonawallofcombustiblematerial without any requirement to fit any additional protective fire resistant material 4 9 TIMBER FRAMED BUILDINGS If the appliance is to be...

Page 26: ...o which people have access including balconies or flat roofs the terminal must be protected by a guard of durable material The guard must be fitted centrally over the terminal Refer to I S 813 when th...

Page 27: ...he correct way up 5 2 CONTENTS Contained within the carton is the boiler the wall bracket carton template anaccessoriespackcontainingapplianceserviceconnections and washers theinstructionpackcontainin...

Page 28: ...d an appropriate type and quantity of fixing should be used to ensure that the bracket is mounted securely Once the bracket has been secured to the wall mount the appliance onto the bracket Fig 11 fla...

Page 29: ...and plugged An appropriate type and quantity of fixing should be used to ensure that the bracket is mounted securely Once the bracket has been secured to the wall mount the appliance onto the bracket...

Page 30: ...pliance Fig 18 5 6 6 COMBINED PRV CONDENSATE DISCHARGE PIPE This appliance will under normal operating conditions produce condensate fluid that will require to be disposed of via the dwelling s waste...

Page 31: ...ance UI and is set adjusted via the OT control INFO Menu When an OT control is connected the info menu will display the HW set point instead of the HW flow rate NOTE all any functions of the main zone...

Page 32: ...release the cover and then remove the cover lifting from the front upwards The 230v electrical supply input is located at the rear right hand side of the PCB see section 8 schematics disconnect and r...

Page 33: ...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 settings as well as LANGUAGE and the duration of the back li...

Page 34: ...d DO_AUX1 0 additional pump management zone valve management DO_AUX1 1 zone valve management zone valve management DO_AUX1 2 additional pump management additional pump management CONFIG OTBUS this par...

Page 35: ...CTIVITY EXT SENSOR set the desired value Note The value of the calculated outdoor temperature used by the thermoregulation algorithm is displayed in the INFO menu under T EXT FOR THERMOREG HEAT REQUES...

Page 36: ...be interrupted by removing the cap from the control panel and pressing the combustion analysis button SW1 or in the following way Select TECHNICAL AIR PURGING CYCLE STOP FUNCTION INSTALLER WEATHER CO...

Page 37: ...burner will switch off and the pump will continue to run In the unlikely event of a fault or malfunction occurring the appliance will enter a temporary or final fault condition during which it shutdo...

Page 38: ...ER ONLY HEATING AND HOT WATER 1 Perform the combustion check verifying that the CO2 values correspond to those indicated in section 2 Once completed remove the analyser probe and close the combustion...

Page 39: ...ault E091 The boiler has an auto diagnostic system which based on the total number of hours in certain operating conditions can signal the need to clean the primary exchanger alarm code E091 Once the...

Page 40: ...ry the simultaneous replacement of both electronics boards AKM and REC10CH MASTER will require the re programming of these parameters Set SERVICE password Select TECHNICAL COMBUSTION MONITORING AIR PU...

Page 41: ...sate fluid b Once the operations have been completed reassem ble the components by operating in the reverse order to what is described checking the floating seal and replace it if necessary If replaci...

Page 42: ...lace Explain to the user how to isolate the appliance from the gas water and electricity supplies and the locations of all drain points Show the user how to operate the appliance and any associated co...

Page 43: ...t 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...

Page 44: ...pipe of the boiler reduce the fan speed via the electronic circuitry Depending on the load either the water temperature will continue to rise until the set point is achieved or the water temperature...

Page 45: ...disconnection and re connection of any electrical wiring or component these checks must be repeated 8 6 FAULT FINDING Before attempting any faultfinding the electrical checks as detailed in section 8...

Page 46: ...return and down arrow buttons until the display changes to show INSERT PASSWORD 3 using the up arrow button press until 18 is shown in the display then press select 4 use the following menu string ME...

Page 47: ...HS pink PWM grey F Lv X13 1 4 1 10 X19 D H W T 1 3 P T t F M 1 3 black 5Vdc blue sign brown red blue sign violet 5Vdc orange red grey grey MOD 1 X9 12 t t t F O H T R S F T F S red red white white gr...

Page 48: ...WARNING The gas supply to the appliance must remain turned OFF until the following procedure has been completed 1 Select STATE BOILER 2 Set the SERVICE password 3 Select TECHNICAL COMBUSTION MONITORI...

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: ...mmissioning 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 boile...

Page 55: ...adhered 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 righ...

Page 56: ...Herts AL2 1HG www vokera co uk www vokera ie Sales General Enquires T 0844 391 0999 F 0844 391 0998 Vok ra Ireland West Court Callan Co Kilkenny T 056 7755057 F 056 7755060 Vok ra Limited reserve the...

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