16
221138C
Diagram 8.1
8 G a s a n d W a t e r C o n n e c t i o n s
Diagram 8.2
2298
'NOTCH' MARKING POSITION OF
SAFETY VALVE DISCHARGE
BOILER
MOUNTING
FRAME
2297
DOMESTIC
COLD
WATER
SUPPLY IN
CENTRAL
HEATING
FLOW
GAS
SERVICE
COCK
CENTRAL
HEATING
RETURN
DOMESTIC
HOT
WATER
OUT
63
SLOT (CLOSED)
SLOT
(CLOSED)
DRAIN POINT
8.1 Gas Connection
Provision is made for the gas supply to be connected
from below or through the wall at the rear of the boiler,
see diagram 8.1 for position.
Refer also to “Gas Supply”, Section 1.7.
Make the gas supply connection to the gas service cock.
Slacken or remove the clip, as preferred, while making
the connection. Do not subject the gas service cock to
heat as you may damage the seals.
8.2 Water Connections
Provision is made for the domestic cold water inlet to be
connected from below or through an internal wall at the
rear of the boiler, see diagram 8.1 for position. Refer
also to Section 5 “Domestic Hot Water System”.
Provision is made for the domestic hot outlet, heating
flow and return to be connected from below, through an
internal wall at the rear of the boiler or from above,
passing down either side of the boiler, see diagram 8.2
for clearances. Take care that any pipework connected
from above, within the boiler mounting frame will clear
the expansion vessels.
If necessary, temporarily fit the boiler, refer to Section
10.1, “Mounting the Boiler”.
Flush out the domestic water and heating system before
connecting the boiler.
Make the connections to the domestic hot water outlet
and the heating system by means of the isolating valves,
see diagram 8.1.
Slacken or remove the clips, as preferred, while making
the connections. Do not subject any of the isolating
valves to heat as you may damage the seals.
Make sure that the drain points on the isolating valves
are positioned towards the front of the boiler, also that
the drain and operating screw heads are accessible.
8.3 Safety Valve Discharge
WARNING. It must not discharge above an entrance or
window or any type of public access area.
A short discharge pipe is supplied loose with the boiler,
which when fitted to the safety valve, will end below the
boiler at the mark between the cold water inlet and the
heating flow, for position and dimension see
diagram 8.1.
This must be extended, using not less than 15mm od
pipe, to discharge, in a visible position, outside the
building, facing downwards, preferably over a drain.
The pipe must have a continuous fall and be routed to a
position so that any discharge of water, possibly boiling,
or steam cannot create any danger to persons, damage to
property or external electrical components and wiring.
Note. To ease future servicing it is advisable to use a
compression type fitting to extend the discharge pipe.