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7

Mynute 24m

SECTION 3A

GENERAL REQUIREMENTS (EIRE)

This appliance must be installed by a competent
person in accordance with and defined by, the
Standard Specification (Domestic Gas Installa-
tions) Declaration (I.S. 813).

3A.1

RELATED DOCUMENTS

The installation of this boiler must be in accord-
ance with the relevant requirements of the local
building regulations, the current ETCI National
Rules for Electrical Installations and the bylaws of
the local water undertaking.
It should be in accordance also with any relevant
requirements of the local and/or district authority.

3A.2

LOCATION OF APPLIANCE

The appliance may be installed in any room or
internal space, although particular attention is
drawn to the requirements of the current ETCI
National Rules for Electrical Installations, and I.S.
813, Annex K.
When an appliance is installed in a room or internal
space containing a bath or shower, the appliance
or any control pertaining to it must not be within
reach of a person using the bath or shower.
The location chosen for the appliance must permit
the provision of a safe and satisfactory flue and
termination. The location must also permit an
adequate air supply for combustion purposes and
an adequate space for servicing and air circulation
around the appliance. Where the installation of the
appliance will be in an unusual location special
procedures may be necessary, refer to I.S. 813
for detailed guidance on this aspect.
A compartment used to enclose the appliance must
be designed and constructed specifically for this
purpose. An existing compartment/cupboard may
be utilised provided that it is modified to suit.

This appliance is not suitable for external
installation

.

3A.3

GAS SUPPLY

The gas meter - as supplied by the gas supplier -
must be checked to ensure that it is of adequate
size to deal with the maximum rated input of all the
appliances that it serves. Installation pipes must
be fitted in accordance with I.S. 813. Pipe work
from the meter to the appliance must be of ad-
equate sizee. Pipes of a smaller size than the
appliance gas inlet connection must not be used.
The installation must be tested for soundness in
accordance with I.S. 813. If the gas supply serves
more than one appliance, it must be ensured that
an adequate supply is maintained to each appli-
ance when they are in use at the same time.

3A.4

FLUE SYSTEM

The terminal should be located where the disper-
sal of combustion products is not impeded and
with due regard for the damage and discoloration
that may occur to building products located 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 may
condense on leaving the terminal; the effect of
such pluming must be considered. If installed less
than 2m above a pavement or platform to 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 cen-
trally over the terminal. Refer to I.S. 813, when the
terminal is 0.5 metres (or less) below plastic
guttering or 1 metre (or less) below painted eaves.

Fig. 6

3.11

INHIBITORS

Vokera recommend that a inhibitor - suitable for use
with copper heat exchangers - is used to protect the
boiler and system from the effects of corrosion and/
or electrolytic action. The inhibitor must be admin-
istered in strict accordance with the manufacturers*
instructions.
*Fernox and Sentinel manufacture products that
have proved suitable for use with Vokera appliances.
Vokera Ltd. cannot comment on the suitability of
any other such product with our appliances.

RETURN

FLOW

GAS

105

131

125

360

65

708

740

85

35

22.5

400

Fig. 6A

Summary of Contents for Mynute

Page 1: ...Mynute 24m Installation Servicing Instructions THESEINSTRUCTIONS TO BE RETAINED BY USER...

Page 2: ...rical connections 13 Commissioning Page 5 1 Gas supply installation 15 5 2 The heating system 15 5 3 Initial filling of the system 15 5 4 Initial flushing of the system 15 5 5 Pre operation checks 15...

Page 3: ...ler which by design incorporates electronic ignition circulating pump expansion vessel safety valve pressure gauge and automatic by pass It is produced as a room sealed category II2H3 appliance suitab...

Page 4: ...tes Thereafter the boiler s output will either be increase to maximum or modulate to suit the setrequirement Whentheappliancereachesthedesiredtempera ture the burner will shut down and the boiler will...

Page 5: ...s Pre charge pressure 1 0 bar 2 4 Dimensions Height 740 mm Width 400 mm Depth 332 mm Dry weight 31 kg 2 5 Clearances Left side 12 mm Right side 12 mm Top 150 mm from casing or 25 mm above flue elbow w...

Page 6: ...Belowgutter drain pipe etc 75mm E Beloweaves 200mm F Below balcony car port roof etc 200mm G To the side of a soil drain pipe etc 150mm H Frominternal externalcornerorboundary 300mm I Aboveground roo...

Page 7: ...suit Details of essential features of compartment cup board design including airing cupboard installations are given in BS 6798 This appliance is not suitable for external installation BS5440 PART 1 F...

Page 8: ...ly this is sufficient however if the system has an unusually high water content it may be necessary to provide additional expansion capacity see 6 19 3 6 6 LOW PRESSURE SEALED SYSTEM An alternative me...

Page 9: ...The gas meter as supplied by the gas supplier must be checked to ensure that it is of adequate sizetodealwiththemaximumratedinputofallthe appliances that it serves Installation pipes must be fitted i...

Page 10: ...rgeneralguid ance only This appliance is a room sealed fan flued boiler consequently it does not require a permanent air vent for combustion air supply When installed in a cupboard or compartment vent...

Page 11: ...e only to the standard 60 100mm concentric flue system 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 the...

Page 12: ...irednumberofflueextensionsor bends uptothemaximumequivalentfluelength to the flue terminal using the clips screws and gaskets supplied fig 8 8A The interior trim should be fitted at this point Fig 8 B...

Page 13: ...given to the fact that there is the possibility of a small amountofcondensatedrippingfromtheterminal ensure that the entire flue system is adequately supported use at least one bracket for each extens...

Page 14: ...must always be level with or below that of the exhaust pipe Dependingonsiteconditionsitmaybepreferable to install the terminal assembly prior to fitting the twinfluepipes Markanddrilla130mmholeforthe...

Page 15: ...andreturnconnections connect a 22 mm pipe to the inlet of each valve and tighten both nuts 4 6 3 SAFETY VALVE fig 6 Connect the safety valve discharge pipe to the safetyvalveoutletandtighten Thedischa...

Page 16: ...ablethroughthecableanchorage fig 6 Connectthesupplycablewires earth live and neutral to their corresponding terminals on the terminal strip Ensure that the EARTH wire is left slightly longer that the...

Page 17: ...GHTING Ensure the electrical supply to the appliance is switchedon Switchthetimeclockorprogrammer iffitted toan on positionandensureallexternal controls are also calling for heat SECTION 5 COMMISSIONI...

Page 18: ...nty 5 13 INSTRUCTINGTHEUSER Hand over all documentation supplied with this appliance including these instructions and explain the importance of keeping them in a safe place Explain to the user how to...

Page 19: ...condition of the entire flue assembly Compare the results with the appliance design specification Any deterioration in performance must be identified and rectified without delay Ensurebothflueventuris...

Page 20: ...e electrical supply and attach a suitable manometer to the gas valve outlet test nipple Remove the compensator tube 7 3 1 SETTING THE MAXIMUM BURNER PRES SURE Light the boiler as described in 5 6 and...

Page 21: ...omponents may also assist in locating the fault 7 7 3 POLARITYCHECK With the appliance connected to the electrical supply and using a suitable multimeter carry out the following voltage tests connect...

Page 22: ...LS CN8 3 CN8 5 ON PCB NO NO YES MADE A LINK BETWEEN BLACK BLACK WIRES AT BOILER TERMINAL STRIP SWITCH ON BOILER AND SELECT MODE TO WINTER C H THERMOSTAT AT MAX YES LOOSE THE PUMP ACTING WITH A SCREWDR...

Page 23: ...HECK SUPPLY FUSE CONNECTORS TO BOILER TERMINALS MAINS BLUE BROWN WIRES AT BOILER STRIP NO REPLACE WIRING OR CONNECTIONS TERMINAL STRIP AND CONTROL BOARD YES YELLOW LED BLINKS CHIMNEY SWEEPER CYCLE RES...

Page 24: ...BETWEEN TERMINALS CN8 7 CN8 8 ON PCB NO YES NO CHECK WIRING AND CONNECTIONS NO DO THE AIR FLOW SWTCH TURN ON CHECK WIRING AND CONNECTIONS AIR FLOW SWITCH AND CONTROL BOARD YES NO ARE THE VENTURI TUBE...

Page 25: ...AND SELECT MODE TO WINTER C H THERMOSTAT AT MAX START RESTART THE TEST NO NO YES REPLACE WIRE AND CONNECTIONS REPLACE CONTROL BOARD REPLACE MODULATOR COIL IS THE RESISTENCE OF MODULATOR COIL ABOUT 70...

Page 26: ...R FLOW TEMPERATURE 80 C WAIT WATER FLOW TEMPERATURE 80 C NO YES REPLACE CONTROL BOARD REMOVE JUMPER IS TIMER JUMPER ON RESTART THE TEST DO BURNER AND FAN SWITCH ON OPEN THE LINK BETWEEN BLACK BLACK WI...

Page 27: ...ressure switch T L High limit thermostat P A Water pressure switch S R Primary NTC sensor JP1 Jumper CH only JP2 Setting timer JP3 Natural gas or LPG selector JP4 Jumper disable enable DHW absolut the...

Page 28: ...EGRALTIME CLOCK TheVokera integral time clock Part no 433 should be installed as shown in diagram 19B If a room thermostat is to be connected it should be of the voltage free type and must be con nect...

Page 29: ...Ignition module 10022174 20 Printed Circuit Board 10025340 21 Led Light Guide 10023816 26 Instrumental panel 10027015 27 Knob 10023818 28 Knob 10023817 31 Case 10023822 40 Door panel 10023810 61 Cover...

Page 30: ...lve 2907 23 Connection 10022499 27 Heating cock 1789 31 Venting plugs kit 01005137 63 Pipe 10020898 288 O ring 6898 289 Clip 2223 290 Clip 2165 300 Clip 2222 303 Connection 2217 353 Ogive 1824 400 Wir...

Page 31: ...e 10023603 3 Pump 10024573 7 Pipe 10022000 8 Heat exchanger 10023651 9 Pipe 10022002 12 Washer 2226 201 Washer 5026 285 NTC sensor 8484 289 Clip 2223 290 Clip 2165 299 Washer 10022726 417 Limit thermo...

Page 32: ...or manifold 10025271 4 Burner 10025270 5 Spark electrode 10025985 12 Pipe 10023996 13 Gas valve 10025074 14 Gas valve solenoid 10020838 15 Gas cock 10020897 16 Cover assembly 10024779 18 Glass 1002155...

Page 33: ...Lateral insulating panel 2231 4 Front insulating panel 2232 10 Fan 10020793 12 Connection 10021972 20 Fumes testing connection pipe 10021973 25 Pressure differential switch kit 01005272 28 Stop clip 1...

Page 34: ...e Thiswillensurethattheoutputoftheboiler burner pressure is not compromised due to a high flow temperature 10 5 2 SETTINGTHE MINIMUM BURNER PRESSURE Once the maximum burner pressure has been checked a...

Page 35: ...33 Mynute 24m...

Page 36: ...0 333 0520 Fax 01442 281403 After Sales Service Tel 0870 333 0220 Vok ra Ireland West Court Callan Co Kilkenny Tel 05677 55057 Fax 05677 55060 Vok ra Ltd reserve the right to change the specifications...

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