45
Check installation has
been carried out to these
instructions.
NO
YES
Ensure gas and electricity
supplies are isolated.
Disconnect gas hose from
burner
Remove burner from tube and inspect burner head.
(See servicing instructions)
Replace burner on tube
and secure.
Open control housing and
check that all components
are securely fastened.
Reconnect gas hose.
Open isolating valve.
Check soundness.
Check thermostat is set to
maximum and is calling
for heat.
Switch on electrical supply.
The red neon should now
be illuminated. If restarting
heater a delay of 15s
should be allowed.
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.
Has the
burner lit?
Check operation on flame failure.
Check gas pressure.
Check gas pressure.
Close control housing
Leave the instructions
with a responsible
person.
3.4
Commissioning chart for VS series unitary heaters
Gas Valve adjustment
Injector pressure
test point.
Adjustment screw under
cap to set injector pressure
Gas inlet
test point
Check operation of
air pressure switch.