Commissioning
47
MAXXfl o EVO 150/302
5.3 CONVERSION FROM SECOND FAMILY (NATURAL GAS - G20) TO
THIRD FAMILY OF GASES (PROPANE - G31)
This water heater is supplied from the factory already set up for G20 Natural Gas, but each heater can be
converted on site to operate on Liquefi ed Propane Gas (G31).
CAUTION
This conversion MUST be carried out by a competent qualifi ed person using ONLY the parts
provided by the manufacturer.
B
efore work commences turn off the Mains Electricity and Gas Supply to the heater.
The conversion can then be
achieved by following these instructions, and must be carried out to all heat exchangers.
•
Remove the throttle adjustment screw cover
•
Compress
the spring clip holding the black air intake hose onto the venturi and remove the hose
•
Undo and remove all 5 screws securing the venturi to the gas valve and fan
•
Remove the venturi completely. If possible, do not disturb the cork gasket if it is stuck to one of the two metal
surfaces (this will be helpful during re-assembly)
•
Check the size of the LPG orifi ce is correct (refer to table overleaf) and fi t the orifi ce into the rubber seal that
is located in the outlet of the gas valve (see illustrations below)
•
Before re-assembly examine the condition of the cork gasket and replace if it is damaged.
•
Position the into place between the fan and gas valve. If the cork gasket is free moving, place a screw
through the venturi to hold it in place when fi tting to the fan (see illustration below)
Remove 5 x Venturi screws
Spring Clip
S
Sp
Sp
Sp
Air intake hose
Throttle adjustment
screw cover
Ori
fi
ce should be seated
fl
ush
with the body of the valve
SET FOR NG
LPG ORIFICE
SET FOR LPG
