Bleeding The Gas Flow Pipe; Gas Consumption Test - Worcester GB162-65 Installation And Servicing Instruction

COMMISSIONING
B Switch off the power supply to the heating system.
ON
OFF
Fig. 80 Switch off the power supply to the heating system
B Check the new pipe section up to and including its
connection (i.e. direct sealing location) to the gas
fitting for leaks, using a foaming product.
The maximum test pressure allowed at the gas valve
inlet is 150 mbar.

10.2.2 BLEEDING THE GAS FLOW PIPE

B Close the gas valve.
Fig. 81 Closing the gas valve
B Open the screw plug on the testing nipple of the gas
supply pressure and for purging [1] by 2 turns and
install a hose.
B Slowly open the gas valve by pushing on the gas valve
and turning it anticlockwise through ¼ rotation (fig.
85, page 58). The gas valve is open when it is in the
vertical position.
B Purge the gas supply into a well ventilated area.
B Close the gas shut-off valve when no more air is
present (fig. 87).
B Remove the hose and tighten the screw plug on the
testing nipple again.
50
GB162-65
6 720 648 726-080.1TD
GB162-80/100
6 720 648 726-081.1TD
Fig. 82

10.2.3 GAS CONSUMPTION TEST

B Isolate all other appliances.
B Set the boiler to full load.
B Ensure that there is no modulating of the fan gas valve
by operating the test mode.
B Carry out the gas consumption procedure as
described in the latest edition of the Essential Gas
Safety book.
NOTE:
B Test the tightness of the measuring
nipple(s) used.
Bleeding the gas flow pipe
6 720 648 726 (2011/07)
6 720 648 726-082.1TD