Rheem 800 Series Owner's Manual page 36

CONNECTIONS – PLUMBING
GAS INLET
The gas connection is made to the left hand side of the gas control. The pipe
work must be cleared of foreign matter before connection and purged before
attempting to light the water heater. An isolation valve and disconnection union
must be installed to allow servicing and removal of the water heater.
Note: Refer to the Gas Installations Standard AS 5601 or AS/NZS 5601.1 for
the correct method of sizing the gas supply pipe to the water heater. The pipe
size selection must take into account the gas input of this water heater (refer to
table on page 32) as well as all of the other gas appliances in the premises.
Warning: Always isolate the water heater before pressure testing the gas
supply system. Disconnect the water heater after the isolating cock to prevent
the risk of serious damage to the gas control. The Rheem warranty does not
cover damage of any nature resulting from failure to observe this precaution.
Refer to rating label for gas types and pressures.
Caution: Care is necessary when tightening fittings into the gas valve. The gas
valve casting may crack if the fittings are over tightened. Cracked valve castings
are not covered under the Rheem warranty. Damaged valves must be replaced.
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