If the gas line has not been correctly purged ignition
may not take place at the first attempt resulting in
the heater going to lockout
Reset the lockout before re starting ignition sequence
Before each attempt at ignition it is necessary
to wait at least 10 seconds
•
Connect the manometer on to the pressure test
point PM and check inlet gas pressure if correct
connect manometer to test point PV and start heater
with heater running ensure the gas pressure
corresponds to that shown on the data plate adjust
by altering the screws RP1 and RP2 on the gas
valve
•
Check that the gas consumption reading
corresponds with that indicated in the TECHNICAL
DATA section Set on/standby switch to standby
when heater is sufficiently cool isolate gas supply
•
Remove manometer ensure the screw at the test
point is tightened test for gas leaks
•
Open the gas isolating cock switch on the electrical
supply set the room thermostat to the desired
temperature.
•
The heater is now ready for operation
GAS VALVE
Model SIT 843 (two stage)
The heater must only be operated with the
burner compartment door(s) closed
STOPPING
To stop the heater use only the room thermostat Set it
to the minimum temperature The fan will stop after 3
minutes or when the heat exchanger is sufficiently cool
If required switch off the electricity supply at the isolator
!
The main electrical supply must not be switched off
or used as a method of stopping the heater except
in an emergency until the heater has cooled down
sufficiently preventing damage to the heat
exchanger
Interruption of electrical supply whilst heater is in
operation will cause it to go to overheat and may
damage the heat exchanger the LIMIT thermostat
will operate and this will have to be manually re set.
PM
Inlet pressure test point.
PV
Head pressure test point
RP1
Cross cut screw low fire adjuster
RP2
Hexagonal screw high fire adjuster
