WATER CONNECTIONS CH
1. Connect the CH ow 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 ow 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 bre 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 8.
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.
FILLING
IMPORTANT -whenlling:
A. Ensure the dust cap on air vent
located at the rear of the pump
chamber is slightly unscrewed.
B. When lling, there may be a slight
water leak from the air vent therefore
electrical connections should be
protected.
1. Ensure that the CH isolating
handles are open.
2. Fill and vent the system. Refer
to Frame 2 for lling and setting
pressure procedure.
3. Check for water
soundness.
Dust Cap
24
ELECTRICAL CONNECTIONS
Wiring should be 3 core PVC insulated cable, not less than
0.75mm
2
(24 x 0.2mm), and to BS 6500 Table 16. For IE
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.
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.
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