IMPORTANT:
A condition of the manufacturer’s warranty is that Benchmark commissioning process is completed.
The flow chart is provided on page 67.
A. Electrical Installation
Complete preliminary electrical system checks.
B. Gas Installation
1.
The whole of the gas installation, including the meter,
should be inspected and tested for tightness and purged
in accordance with the recommendations of BS.6891.
2.
Purge air from the gas installation by the approved
methods only.
2.24 REPLACING PRE-FITTED MAINS CABLE
General
The combustion for this appliance has been checked,
adjusted and preset at the factory for operation on the gas
type defined on the appliance data plate.
Do not adjust the air / gas ratio valve.
Check the following:
1.
The boiler has been installed in accordance with these
instructions.
2.
The integrity of the flue system and the flue seals, as
described in the Flue Installation Section.
Proceed to put the boiler into operation as follows:
1.
Check the operational gas inlet pressure.
2.
Set up the boiler to operate at maximum rate by opening
hot tap to maximum flow.
3.
With the boiler operating in the maximum rate condition,
check that the operational gas pressure at the inlet gas
pressure test point complies with the requirements.
4.
Ensure that this inlet pressure can be obtained with all
other gas appliances in the property working.
Refer to Gas Supply
page 10
2.25 COMMISSIONING AND TESTING
Strain
Relief
If it is necessary to use an alternative mains cable to the one
pre-fitted then use the following guide.
Replacement wiring should comply with notes
and be carried
out by a qualified person.
Refer to Section
2.21
1.
Isolate the mains supply to the boiler.
2.
Remove the front panel.
3.
Swing the control box down into the service position,
unclip and swing back the installer wiring cover to latch
into the retaining clips.
4.
Unscrew the L N & E connections & remove wires from
connector.
5.
Remove the mains cable by pulling back through the
grommet.
6.
Route the replacement through the grommet and re-fit.
7.
Close the installer wiring cover ensuring that it is located
correctly and that the cable is retained into the strain
relief as shown.
5
8.
Swing the control box back up into the operating
position and re-fit the front panel ensuring a good seal
is made.
The earth connection should be longer than the current
carrying connections. If the cord anchorage slips, the
current carrying wires become taut before the earth.
WARNING:
Electrical safety checks should be
carried out by a qualified person.
WARNING:
Open windows, doors and extinguish
flames before starting the next steps. Do not smoke.
Gas Pressure
Test Point
Gas
Supply
30
Installation and Servicing
Section 2 - Installation
INST
ALLA
TION
