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When connecting gas supply, the length of the run from
the meter must be considered in determining the pipe size
to avoid excessive pressure drop. A line pressure of
7”
w.g. (178mm w.g.) for natural gas should be maintained
when sizing piping. For correct sizing of piping, consult the
utility having jurisdiction.
A drip leg should be installed in the vertical pipe run
to the unit. In some localities, codes may require that
a manual main shutoff valve and union (furnished by
installer) be installed external to the unit. Union must be
of the ground joint type. A drip leg should be readily ac-
cessible to permit cleaning and emptying. See figure 8.
NOTE -
If a switch box is mounted over electrical k nock -
outs on back of unit, leave a minimum of 4” (102mm)
clearance between switch box and drip leg.
A
1/8” NPT plugged tap shall be installed immediately up-
stream of the gas supply connection to the heater.
NOTE -
Compounds used on threaded joints of gas pip-
ing must be resistant to the actions of liquefied petroleum
gases.
After gas piping is completed, carefully check all piping
connections, (field and factory), for gas leaks. Use a soap
solution or other preferred means.
CAUTION
DO NOT use matches, candles, flame or other sources
of ignition to check for gas leaks.
The appliance must be isolated from the gas supply piping
system by closing its individual manual gas shutoff valve
during any pressure testing of the gas supply system at
test pressures equal to or greater than 1/2 psig (3.45kPa).
NOTE -
In case emergency shutdown is required, shut
down main gas valve and disconnect main power to unit.
These devices should be properly labeled by the installer.
Unit Start-Up
FOR YOUR SAFETY READ BEFORE LIGHTING
WARNING
Electric shock hazard. Can cause injury
or death. Do not use this unit if any part
has been under water. Immediately call a
qualified service technician to inspect the
unit and to replace any part of the control
system and any gas control which has been
under water.
WARNING
Install, operate and maintain unit in accordance with
manufacturer’s instructions to avoid exposure to fuel
substances or substances from incomplete combustion
which can cause death or serious illness.
WARNING
Danger of explosion. Can cause injury or
product or property damage. If overheating
occurs or if gas supply fails to shut off, shut
off the manual gas valve to the appliance
before shutting off electrical supply.
WARNING
Electric shock hazard. Can cause injury or
death. Before attempting to perform any
service or maintenance, turn the electrical
power to unit OFF at disconnect switch(es).
Unit may have multiple power supplies.
WARNING
Danger of explosion. Can cause injury or
product or property damage. You must follow
these instructions exactly.
BEFORE LIGHTING smell all around the appliance area
for gas. Be sure to smell next to the floor because some
gas is heavier than air and will settle on the floor.
Use only your hand to move the lever. Never use tools. If
the lever will not move by hand, do not try to repair it, call a
qualified service technician. Force or attempted repair may
result in a fire or explosion.
IMPORTANT
The heater and its individual shut off valve must be
disconnected from the gas supply piping system during
any pressure testing of that system at test pressures in
excess of 1/2 psig (3.45kPa). See figure 9.
Gas Connection
Leak Check
