andrews MAXXflo EVO CWH 30/201, Руководство по установке и обслуживанию

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Commissioning 43 MAXXfl o EVO
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).
This conversion must be carried out by a competent quali fi 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 the 5 screws securing the venturi to the gas valve and fan
• Remove the venturi completely and if you can, 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
• Re-assemble the venturi between the fan and gas valve and secure onto the fan using the 2 screws
5 x Venturi screws
Spring Clip Sp Sp
Air intake hose
Ori fi ce should be seated fl ush
with the body of the valve
GAS VALVE
SET FOR NG
LPG ORIFICE
SET FOR LPG