4
2. Commissioning
Instructions.
Check installation has
been carried out to these
instructions.
NO
YES
Ensure gas and electricity
supplies are isolated.
Disconnect gas hose from
burner
Replace burner on tube
and secure.
Open control housing and
check that all components
are securely fastened.
Close control housing
Reconnect gas hose.
Open isolating valve.
Check soundness.
Check thermostat is set to
maximum and is calling
for heat.
A successful ignition is
indicated by the amber
light illuminating and
remaining illuminated.
The heater should now
run through its start up
sequence and ignite.
Turn off power and check
that all components are
securely fastened.
Check gas
pressure.
Remove burner from tube
and inspect burner head.
(See servicing instructions)
Check operation of
air pressure switch
Leave the instructions
with a responsible
person.
Injector pressure
test point.
Adjustment screw under
cap to set injector pressure
Figure 1. VSX Gas Valve adjustment
These appliances should be commissioned by a qualified engineer.
2.1 Tools
Required.
The following tools and equipment are advisable
to complete the tasks laid out in this manual.
Suitable alternative tools may be used.
S m a l l F l a t
Head
Screwdriver
Manometer
Pozidrive
Screwdriver
Leather
Faced
Gloves
4mm
Allen
Key
12mm
Spanner
Large Adjustable
Spanners or 22, 26 &
27mm Spanners for
fitting of Gas Flex.
13mm
Socket
Wrench with
Extension
Switch on electrical supply.
The red neon should now
be illuminated. If restarting
heater a delay of 15s
should be allowed.
Has the
burner lit?
Check operation on
flame failure.
Check gas pressure.
Gas inlet
test point