33
INITIAL START UP
VENTILATION
•
Switch on mains supply to the equipment
•
Set On/ Standby switch to ON
Set the remote control panel switch to VENT check that
fans rotation is correct
HEAT
•
Set the remote control panel to HEAT
•
Set the room thermostat to the desired temperature
•
The flue venter will start, activating the differential
pressure switch
After a short period ignition takes place After one
minute the air flow fan will start
When desired room temperature is reached the burner
will stop the fan will overrun for approximately 3-4
minutes.
IGNITION
•
Connect the manometer on the pressure test point
on the gas manifold
•
Set mains isolator to On
•
Open gas isolator cock
•
Set the on/standby switch to ‘On’
•
Set heat/vent switch to Heat
•
Set the room thermostat to the desired temperature
•
Reset any lockout in the system as indicated by the
red or yellow lights.
The flue venter will start up activating the differential
pressure switch.
The heater will pre purge the combustion chamber the
electronic control box will supply the ignition electrode
and the gas valve simultaneously.
If the gas line has not been correctly purged ignition
may not take place at the first attempt resulting in
lockout of the burner. Reset button and repeat.
Before each attempt at ignition it is
necessary to wait at least 10 seconds.
When the burner has ignited check the manometer and,
adjust gas pressure setting to pressure indicated on
data plate, adjust by turning the solenoid valve screw
on gas valve.
•
Check 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 electrical supply Isolate gas
supply. Remove the manometer and ensure the
screw at the test point is tightened to avoid any gas
leaks
•
Open the gas isolating cock Switch on electrical
supply. Set the room thermostat to the desire
temperature. The heater is now ready for operation.
WARNING!
The heater must only be operated with the burner
compartment door(s) closed
STOPPING
To stop the heater using only the room thermostat Set it
to the minimum temperature. Fan will stop after about
3-4 minutes. If required, switch off the mains current at
the isolator.
WARNING
If Heater is to be switched Off for a Long Period set
ON/STANDBY switch to STANDBY.
Isolate at mains electrical supply
Isolate the gas supply
Model SIT 840 (SINGLE STAGE)
Model SIT 843 (TWO STAGE)
PM
Main inlet pressure point
PV
Head pressure test point
RP
Pressure adjusting screw
RP1
Cross cut screw low fire adjuster
RP2
Hexagonal screw high fire adjuster
