VOKERA unica he Installation & Servicing Instructions Manual Download

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288

432

438

265

201

353

366

351

328

351

328

353

366

351

328

435

288

432

439

432

444

443

290

442

435

288

432

441

436

266

201

433

288

521

433

201

434

438

439

433

288

432

438

265

201

353

366

351

328

351

328

353

366

351

328

435

288

432

439

432

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443

290

442

435

288

432

441

436

266

201

433

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439

433

POS.

DESCRIPTION

28 HE

32 HE

36 HE

Condensing exchanger assembly

8037

1957

10024627

Fitting/union

10024640

Pressure switch

10028141

Non return valve

10025056

By-pass casing

10024641

Heating by-pass valve

2047

3-way heating manifold and cartridge

10026508

3 way valve cartridge

10025305

Motorised valve

10025304

Clip

10025450

Clip

10025449

Safety valve

10025055

10 lt. flow governor

10024987

10025080

10026046

10 lt. flow governor

10026044

10026041

10 lt. flow governor

10026045

10026042

Pipe

10025839

Dhw actuator

10022349

Heating cock

1789

Connection

1790

1/8 heating deviation cock

10023567

1/8 heating deviation cock

10023566

Flexible oil line

10023570

Pipe

10025840

Cover for by-pass assembly

10024643

Cock

10024646

Non return valve

10023569

1/8 heating deviation cock

10023568

Pipe

10026228

201

Washer

5026

265

Washer

5236

266

Washer

5237

288

Ring

6898

290

Clip

2165

328

Clip

1890

351

Nut

1823

353

Nut

1824

366

Clip

1820

432

Clip

10024958

433

Clip

10024986

434

1/2" nipple

10024985

435

Fitting/union

10025059

436

Clip

10025062

438

O ring

10024988

439

Washer

10025067

441

Clip

10025063

442

O ring

10025065

443

O ring

10025064

444

Washer

10025066

521

Ntc sensor

10027351

10027361

Table 2

28 HE

32 HE/36 HE

Summary of Contents for unica he

Page 1: ...SE INSTRUCTIONS TO BE RETAINED BY USER Vok ra 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...

Page 2: ...7 Checking gas pressure combustion analysis 16 5 8 Final flushing of the heating system 17 5 9 Setting the boiler operating temperature 17 5 10 Setting the system design pressure 17 5 11 Regulating th...

Page 3: ...integral part of the appliance It is therefore necessary to ensure that the booklet is handed to the person responsible for the property in which the appliance is located installed A replacement copy...

Page 4: ...time clock programmer comfort and you want the domestic hot water to be pre heated DHW temperature selector Move the selector clockwise to increase the hot water outlet temperature or counter clockwis...

Page 5: ...rature the burner will shut down and the boiler will perform a three minute anti cycle timer delay When the request for heat has been satisfied the appliance pump and fan may continue to operate to di...

Page 6: ...e Sides 12mm Top 150mm from casing or 25mm above flue elbow whichever is applicable Bottom 150mm Front 600mm 2 7 Connections UNICA HE Range Flow return 22mm Gas 15mm DHW hot cold 15mm Safety valve 15m...

Page 7: ...y level 300 mm J From a surface or boundary facing the terminal 1200 mm K From a terminal facing a terminal 1200 mm L From an opening in the car port into the building 1200 mm M Vertically from a term...

Page 8: ...o the appliance must be of adequate size Pipes of a smaller size than BS 5440 PART 1 FLUES BS 5440 PART 2 FLUES VENTILATION BS 5449 PART 1 FORCED CIRCULATION HOT WATER SYSTEMS BS 5546 INSTALLATIONOFGA...

Page 9: ...ILLING Frequent filling or venting of the system may be indicative of a leak Care should be taken during the installation of the appliance to ensure all aspects of the system are capable of withstandi...

Page 10: ...ated nearby The terminal must not be located in a place where it is likely to cause a nuisance see I S 813 In cold and or humid weather water vapour will condense on leaving the terminal the effect of...

Page 11: ...a wall of combustible material a sheet of fireproof material must protect the wall 3A 9 TIMBER FRAMED BUILDINGS If the appliance is to be fitted in a timber framed building it should be fitted in acc...

Page 12: ...let permits both horizontal and vertical flue applications to be considered alternatively the Vokera twin flue system can be utilised if longer flue runs are required 4 5 1 CONCENTRIC HORIZONTAL FLUE...

Page 13: ...ance NOTE When cutting an extension to the required length you must ensure that the excess is cut from the plain end of the extension see fig 9 10 Remove any burrs and check that all seals are located...

Page 14: ...stem be carried out in strict accordance with these instructions GUIDANCE NOTES ON TWIN FLUE INSTALLATION The flue must have a have a minimum 1 maximum 3 1 17mm per 1000mm fall back to the appliance t...

Page 15: ...lowances have been made for connection onto the previous piece and onto the concentric to twin converter The last twin Flue pipes must be pushed 50mm onto the male spigots of the concentric to twin co...

Page 16: ...lied with a 15mm service valve connect a 15mm pipe to the inlet of the valve and tighten both nuts NOTE It will be necessary to calculate the diameter of the gas supply pipe to ensure the appliance ha...

Page 17: ...appliance must 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 4 7 1 CASING REMOVAL Fig 17 To gain int...

Page 18: ...nts Open the drain valve full bore to remove any installation debris from the boiler prior to lighting Refill the boiler and heating system as described in 5 3 5 5 PRE OPERATION CHECKS Beforeattemptin...

Page 19: ...rictors are included in the accessory pack The spare flow rate restrictors can be fitted to either increase or decrease the maximum flow rate Thetablesoverleafdenotethesizeofrestrictor fitted and the...

Page 20: ...and clean if necessary the condense trap to ensure correct operation 6 3 REPLACEMENT OF COMPONENTS Although it is anticipated that this appliance will give years of reliable trouble free service the...

Page 21: ...the reverse order 6 11 PRINTED CIRCUIT BOARD fig 25 Carry out component removal procedure as described in 6 4 Pull the control fascia forward and lower it Push the clips A which secure the PCB cover r...

Page 22: ...the wiring connections Fig 29 Slacken the gas pipe A at the air box connection and swing rotate of the fan assembly Disconnect the flow B return C and condense connections on the heat exchanger Locate...

Page 23: ...wer frame Locate and remove the 6 screws A that secure the vessel top holding plate B remove the plate The expansion vessel can now be removed Replace in the reverse order Ensure all seals are in good...

Page 24: ...rse order 6 20 5 DIVERTOR VALVE ASSEMBLY Fig 35C Carry out component removal procedure as de scribed in 6 4 Remove the valve actuator as de scribed in 6 20 Locate and remove the locking pin A that sec...

Page 25: ...heCOfunctionisactive allotherfunctions are disabled minimum power operating period anti cycle set point etc Once enabled the CO function will remain active for a 15 minute period or until the function...

Page 26: ...the respective appliance specification as detailed on the appliance data badge 7 3 1 CHECKING ADJUSTING THE APPLIANCE FAN SPEEDS Move the selector switch to the OFF position and remove the 3 selector...

Page 27: ...hot water Check pipe work No heating Check external controls Fault code Possible cause 10 Check gas supply check flue system check polarity 7 8 ELECTRICAL CHECKS Any electrical checks must be carried...

Page 28: ...fill system pressure reset check appliance operation AL41 Insufficient system water pressure Temporary Check refill system pressure check appliance operation AL52 Internal fault Final Reset check appl...

Page 29: ...rols can be found in CHeSS HC5 HC6 www energyefficiency gov uk SECTION 8 WIRING DIAGRAMS 8 4 VOKERA MECHANICAL CLOCK code The Vokera mechanical clock product code is entirely suitable for the Unica HE...

Page 30: ...over heat thermostat H E T Heat exchanger thermostat M3 M5 Terminal strip for supply in clock room thermostat M3a M4 Terminal strip for esternal sensor condense pump low temperature thermostat OT Open...

Page 31: ...10028554 20 Printed Circuit Board 10028558 10028558 10028558 21 Led light guide 10028557 10028557 10028557 26 Front panel 10028632 10028632 10028632 27 Knob assembly 10028559 10028559 10028559 31 Cas...

Page 32: ...r 10026044 10026041 10026041 24 10 lt flow governor 10026045 10026045 10026042 25 Pipe 10025839 10025839 10025839 26 Dhw actuator 10022349 10022349 10022349 27 Heating cock 1789 1789 1789 28 Connectio...

Page 33: ...28264 10 Pipe 10028631 10028643 10028643 17 Air venting plug 10026275 10026275 10026275 25 Siphon 10028405 10028405 10028405 26 Condensing pipe 10028540 10027191 10027191 27 Condensing pipe 10027192 1...

Page 34: ...897 10020897 10020897 16 Air box cover 10028345 10026230 10026230 19 Glass stopper assembly 10026328 10026328 10026328 27 Plug 10023805 10023805 10023805 35 Air gas conveyor 10028420 10028420 10028420...

Page 35: ...Conveyor 10028536 10028623 10028623 12 Flue drain connection 10028421 10028421 10028421 475 Washer 10026323 10026323 10026323 482 Washer 10026366 10026366 10026366 487 Washer 10026345 10026345 1002634...

Page 36: ...appliance casing as described in 4 7 1 Set the flue gas analyser to read CO2 and insert the probe into the flue analysis test point A B fig 35 Restore the electrical supply to the boiler and switch th...

Page 37: ...selector switch to the OFF position and remove the 3 selector knobs 10 7 2 ABSOLUTE MAX FAN SPEED Locate the MAX trimmer fig 36 and gently adjust clockwise or counter clockwise to achieve the correct...

Page 38: ...HAT TYPE OF SCALE REDUCER HAS BEEN FITTED FOR THE DOMESTIC HOT WATER MODE MEASURE RECORD GAS RATE 3 hr MAXIMUM BURNER OPERATING PRESSURE IF APPLICABLE mbar COLD WATER INLET TEMPERATURE C HOT WATER OUT...

Page 39: ...CARD SERIAL No COMMENTS SIGNATURE SERVICE 3 DATE ENGINEER NAME COMPANY NAME TEL No CORGI ID CARD SERIAL No COMMENTS SIGNATURE SERVICE 4 DATE ENGINEER NAME COMPANY NAME TEL No CORGI ID CARD SERIAL No...

Page 40: ...es vokera co uk www vokera co uk www vokera ie Sales General Enquires T 0844 391 099 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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VOKERA unica he, Installation & Servicing Instructions Manual

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