19
6-1 Changing gas
The unit heaters are equipped with atmospheric gas torch burners, permitting the use of Natural gas G20,
Natural gas G25 and Propane.
The combustion ports are engineered so as to ensure very good stability of the flame without separation or
return towards the injectors.
T
HE
SERVICE
VISITS
MUST
BE
CARRIED
OUT
BY
A
QUALIFIED
PROFESSIONAL
PERSON
.
Changing the gas is carried out in the following manner:
1- Disconnect the electrical supply connector and close the gas inlet.
2- Unscrew the gas line fixing nut (Item 1) on the gas valve and also the three screws (Item 2) which retain
the injector ramp on the burner block.
3 – Change the injectors (see adjustment table).
4 – Screw in the new injectors (Item 3) changing the seals (Item 4) and making sure concerning sealing.
The injectors must be installed dry.
5 – Reassemble the ramp and connect the gas line to the gas valve,
replacing the seal
, make sure during
assembly not to forget, or damage the seal.
6 –
Check for sealing after assembly.
7 – Adjust the gas ramp pressure on the regulator.
CAUTION : This operation must be done with the gas and electricity supplies cut off.
6- GAS CIRCUIT
2
3
4
1
The adjustment of the gas pressure is made with the burner running
Adjusting the gas pressure is done in the following manner:
1– Open the solenoid valve pressure regulating protection screw.
2- Unscrew the pressure test point, connect the pressure gauge (5)
2- Adjust the ramp pressure (6), in accordance with the adjusting table.
3-
After adjustment, do not forget to put the protective screw back in place and to close the
pressure test point.
6 –
Check for sealing after making the adjustment.
5
6
