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-11-
WARNING
Exposure to a higher gas supply pressure may cause damage to
the control, resulting in explosion or fire. Consult your local gas
supplier and gas authorities. DO NOT PUT INTO SERVICE
IF OVER-PRESSURIZATION HAS OCCURRED.
Use gas piping of adequate sizing to ensure full gas input. All
piping must comply with all local codes. In the absence of local
codes, piping must comply with the rules stated by the applicable
National Fuel Gas Codes. Final connection to the water heater is
made using 1/2" N.P.T. pipe.
• A manual gas shut-off valve shall be installed in the gas line
near the water heater. A union is recommended for ease of
service.
• To trap dirt or foreign material in the gas supply, a dirt (drip)
leg shall be installed in the piping.
• Apply joint compound (pipe dope) to the male ends of the
threads before joining pipe sections. Use only compounds
that are compatible with natural gas and propane fuels. To
prevent damage to the gas valve, do not over-tighten.
Purging Caution:
Gas line purging is required to eliminate air from the piping
system. Purging should be performed by persons experienced in
this type of gas service. Do not purge in confined areas or space
where ignition may occur. To avoid risk of fire or explosion ensure
the area is well-ventilated and all sources of ignition are de-
activated. Contact your local gas authority for local requirements.
IMPORTANT: Disconnect the water heater from the gas
piping during any high pressure testing above 0.5 p.s.i. Perform a
leak test at normal gas pressure on all fittings after all
connections have been made and the gas has been turned on. Soap
test all connections of the gas system - bubbles indicate leaks.
Gas Pressure
GSW Water Heating Company recommends that the gas supply
pressure as measured on the inlet side of the water heater
control, be set at 7.0 inches water column for natural gas and 11.0
inches water column for propane gas.
Electrical Supply
A three-wire cord and plug is provided with this water heater.
The plug shall be connected into an electrically grounded, 120
VAC, 60 Hz, 12 Amps, fused receptacle. The electrical supply
must meet the minimum provisions as stated in the National
Electrical Code for U.S. customers and in the Canadian Electrical
Code for Canadian customers.
The electrical controls used inside the thermostat/gas valve
mounted on this water heater is polarity sensitive. Ensure that
the electrical supply is properly connected in the receptacle box.
Failure to connect properly will cause the unit not to function (See
Figure 10).