2.15 CONNECTIONS & FILLING
FILLING
IMPORTANT - when lling:
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 valve handles are open.
2. Fill and vent the system. Refer to Section 2.15 for lling
and setting pressure procedure.
3. Check for water soundness.
NOTES.
Ensure all boss blanking plugs are removed before connecting hardware. Each
valve must be tted to the correct boss as shown in the picture.
Ensure each union is tted with bre 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 ow service valve and copper tail
provided in the hardware pack to the threaded boss
connection provided at the lower rear of the boiler.
2.
Connect the CH return valve (black handle) and copper tail.
3. If connecting the boiler to heating loads in excess of
17.6kW, 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 Section 1.16 for details of
the position of the gas connection.
For additional gas supply info refer to Section 1.8.
PRESSURE RELIEF VALVE DRAIN
The pressure relief valve connection, located at the bottom right-
hand side of the boiler, comprises a 15mm diameter stub pipe.
The Installer is to provide a compression 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.
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