Worcester GB162-65 Installation And Servicing Instruction page 21

INSTALLING THE GAS CONNECTION
DANGER: Danger of fatal accident from
explosive fumes.
B Make sure that the factory-fitted flat
rubber seal is located in the threaded
connection (boiler side) (
detailed picture).
Fig. 13 Rubber seal
The gas installation must be installed in accordance with
BS 6891.
CAUTION:
Pipework from the meter to the boiler MUST
be of adequate size.
The complete installation MUST be tested for gas
leakage and purged as described in IGE/UP/1b.
NOTE:
For the installation of the gas valve a gas
valve connector 1" [1] is necessary. To
order, see address on the back of this
document.
B Install the gas valve connector 1" [1] (accessory).
6 720 648 726 (2011/07)
B Install the gas valve [2] onto the gas pipe. Use a gas
valve with a minimum diameter of 1".
fig. 13,
Fig. 14
1
2
B Connect the main gas pipe to the gas connection
making sure it is not under stress. Use a gas pipe of at
least Ø 22 mm.
B Make the gas connection according to the country-
6 720 648 726-013.1TD
specific standards and regulations.
B Carry out gas leak test on gas connection using leak
detection spray and and purged as described in
IGE/UP/1b.
INSTALLING THE HEATING FLOW AND RETURN PIPE
The central heating system should be installed in
accordance with BS 6798 and, in addition, for smallbore
and microbore systems, BS 5449 or EN 12823.
B Connect the flow pipe with a flat rubber seal installed
to the CHF (CH boiler flow) connection [1] making
sure it is not under stress. Use a flow pipe with a
minimum diameter of 1½".
G1"
R1"
Making the gas connection
Gas valve connector 1"
Gas valve 1"
When using plastic pipes, observe the
supplier's instructions - especially those
referring to recommended jointing
techniques and the notes relating to the
heating system water on page 9.
NOTE:
To prevent contamination in the heating
system we recommend you to integrate a
dirt filter [10] in the return pipe, near the
boiler. In an old system it is a requirement to
install a dirt filter.
B Install shut-off valves to enable filter
cleaning immediately upstream and
downstream of the dirt filter.
INSTALLATION
1
2
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21