22
British Gas 100 & 125 RD2 -
Installation & Servicing
INSTALLATION
2.
Ensure that all valves are open. Fill and vent the system
and check for water soundness.
Notes.
a.
Isolating valves must be fitted as close to the pump
as possible.
b.
The boiler is not suitable for use with a direct hot
water cylinder.
32 WATER CONNECTIONS
1.
Connect the system flow and return pipework to the
boiler as appropriate. Refer to Frames 3,4, 5 and 6 for
guidance on system design.
Notes.
Pumped flow and return pipes MUST be 28mm.
Gravity connections MUST be 28mm (1").
31 GAS CONNECTION
1.
A MINIMUM working gas
pressure of 20 mbar (8
in.w.g.) MUST be available
at the boiler inlet, with the
boiler operating.
2.
Extend a gas supply pipe
NOT LESS THAN 15mm
(
1/2
") OD to the boiler and
connect to the gas cock
situated at the front LH side
of the boiler.
3.
Test the gas installation for
soundness and purge in
accordance with BS.6891:
1988. Refer to Servicing
instructions.
Boiler
Dimension A
100
473 (18
5/8
")
125
546 (21
1/2
")
30 TERMINAL WALL PLATE
This plate allows neat concealment and full compression of
the rubber seal. Its use is not essential if the flue hole and
flue ducts have been accurately cut and the outside wall
face is flat.
1.
Position the terminal wall plate over the terminal.
2.
Mark and drill 4 fixing holes with an 7mm (
9/32
") masonry
drill.
3.
Insert the 4 plastic plugs provided.
4.
Secure the plate with 4 of the No.10 x 2" screws
provided.
Note.
If the terminal is less than 2m (6' 6") above ground
level, an approved terminal guard should be fitted. Refer to
the Contents List on Page 4.
INST
ALLA
TION
