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23 CONNECTIONS & FILLING
NOTES.
Ensure all boss blanking plugs are removed before connecting hardware. Each valve must be fitted to the correct boss as shown
in the picture.
Ensure each union is fitted with fibre seals provided. Do not subject any of the isolating valves to heat as the seals may
be damaged.
WATER CONNECTIONS CH
1. Connect the CH flow service valve provided in the hardware
pack to the threaded boss connection provided at the lower
rear of the boiler.
2. Connect the CH return valve.
3. For boiler outputs of 18, 24 & 30:
If connecting the boiler to heating loads in excess of
60,000 Btu/h, connecting flow and return heating systems
pipework must be sized in 28mm diameter at the point of
pipe connection to the boiler tails. Use 22mm x 28mm pipe
adaptors as appropriate.
GAS CONNECTION
IMPORTANT.
The gas service cock is sealed with a non-metallic
blue fibre washer, which must not be overheated when making
capillary connections. Refer to Frame 1 for details of the position of
the gas connection.
For additional gas supply information refer to "Gas Supply" on page 10.
SAFETY VALVE DRAIN
The safety valve connection, located at the bottom right-hand side of
the boiler, comprises a 15mm diameter stub pipe.
The Installer to provide a comprssion joint on the end of the stub pipe.
This assists with pipe removal when servicing.
The discharge pipe should be positioned so that the discharge
of water or steam cannot create a hazard to the occupants of the
premises or damage the electrical components and wiring.
Note. An optional safety valve wall outlet kit is available if required.
Safety Valve
Drain Connection
15mm elbow
or fittings
(not supplied)
24 ELECTRICAL CONNECTIONS
WARNING. This appliance MUST be earthed.
A mains supply of 230Vac ~ 50 Hz is required.
The fuse rating should be 3A. All external controls and wiring
must be suitable for mains voltage.
Wiring external to the boiler MUST be in accordance with the
current I.E.E. (BS.7671) Wiring Regulations and any local
regulations.
28
INSTALLATION
FILLING
IMPORTANT - when filling:
A. Ensure the dust cap on air vent
B. When filling, there may be a slight
1. Ensure that the CH isolating
2. Fill and vent the system. Refer
3. Check for water
Black
Handle
205552-10119
Safety Valve
Drain Pipe
Wiring should be 3 core PVC insulated cable, not less than
0.75mm
reference should be made to the current ETCI rules for
electrical installations.
Connection must be made in a way that allows complete
isolation of the electrical supply such as a double pole switch
having a 3mm (1/8") contact separation in both poles. The
means of isolation must be accessible to the user after
installation.
located at the rear of the pump
chamber is slightly unscrewed.
water leak from the air vent therefore
electrical connections should be
protected.
handles are open.
to Frame 2 for filling and setting
pressure procedure.
soundness.
Note that all isolation handles are
shown in the open position.
CH Flow
Gas
Yellow
Supply
Handle
(24 x 0.2mm), and to BS 6500 Table 16. For IE
2
Dust Cap
Safety
Drain
Valve
Black
Handle
CH Return
Installation and Servicing
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