General Connection Of Mains Water And Gas Components; General; Install The Water And Gas Connections; To The Boiler Using A Pump Group - Worcester GB162-65 Installation And Servicing Instruction

INSTALLATION
Fig. 11 Removing the covers
8.2 GENERAL CONNECTION OF MAINS
WATER AND GAS COMPONENTS
8.2.1

GENERAL

The water and gas connections to the boiler can be
made in either of two ways:
• using a pump group (
• without a pump group.
Fig. 12
Pump group (accessory)
The circulation pump is not factory-installed in the
boiler. This pump is included in the pump group

(accessory).

If you do not make use of a pump group, you have to
install a separate circulation pump under the boiler. This
pump must be selected so that the volume flow through
the boiler is sufficient to handle the maximum boiler
capacity.
Correct pump selection see chapter 8.2.8 "Selecting and
installing the pump", page 22.
20
6 720 648 726-011.1TD
fig. 12)
6 720 648 726-012.1TD
The pump group has been developed specifically for this
boiler and has already been fitted with the correct
pump.
The pump group also includes various fittings, such as
service fittings, a pressure relief valve, a pressure gauge,
a gas valve etc. This makes installing the appliance easier
to overcome resistance in the heating circuit.
Both installation methods are described below.
B Decide whether you would like to connect the heating
device with or without a pump group. If you don't use
our pump group, you have to calculate a separate
pump. Make sure, that the pump is large enough, for
the flow to overcome resistance in the heating circuit.
8.2.2

INSTALL THE WATER AND GAS CONNECTIONS

TO THE BOILER USING A PUMP GROUP

(ACCESSORY)
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.
The gas installation must be installed in accordance with
BS 6891.
B Install the pump group on the boiler in accordance
with the enclosed installation instructions.
CAUTION:
Do not use galvanised radiators or pipes.
8.2.3 INSTALL THE WATER AND GAS CONNECTIONS
TO THE BOILER WITHOUT A PUMP GROUP
B Connect all pipes making sure that they are not bent
or twisted to cause any stress.
CAUTION:
Do not use galvanised radiators or pipes.
B Make sure that the connections are tight and carry out
a gas and water leakage test after completing the
connection work.
DANGER: Danger of fatal accident from
explosive fumes.
B Only carry out work on gas pipes and
fittings if you are Gas Safe / ACS
registered.
6 720 648 726 (2011/07)