Owner`s manual

Installing Your Heater
11
Gas Pressure Check
The heater regulator controls the gas pressure to the burner.
The gas pressure should be checked at the pressure test point.
Pressure should be checked with unit on high.
The pressure test point for these models is a 1/8" NPT plugged
tap located at the bottom of the regulator (see illustration
below). To gain access to the regulator, follow these steps:
1. Lift screen straight up. Pull bottom of screen out. Pull
screen down and set aside.
2. Remove two (2) screws on bottom front panel. Remove
bottom front panel and set aside.
3. Pressure test is at the regulator.
WARNING: Danger of property damage, bodily
injury or death.
Make sure the heater is equipped to operate on
the type of gas available. Models designated as
natural gas are to be used with natural gas only.
Heaters designated for use with Liquefied
Petroleum (L. P.) gas have orifices sized for
commercially pure propane gas. They cannot be
used with butane or a mixture of butane and
propane.
The maximum inlet supply pressure for this heater must be 7.0
inches for natural gas and 13 inches for LP gas. The minimum
inlet supply pressure for the purpose of input adjustment must
be 5 inches for natural gas and 11 inches for LP gas. The
control on this heater is equipped with a regulator which
reduces the manifold pressure to 4 inches for natural gas and
10 inches for LP gas.
Pressure Testing Supply Line
CAUTION: The unvented room heater and its individual
shutoff valve must be disconnected from the gas supply piping
system during pressure testing of that system at test pressures
in excess of 1/2 psig (3.5 kPa). The unvented room heater
must be isolated from the gas supply piping system by closing
its individual manual shutoff valve during any pressure testing
of the gas supply piping system at test pressures equal to or
less than 1/2 psig (3.5 kPa). Pressures in excess of 1/2 psig
(3.5 kPa) will cause damage to the control valve and may
cause damage to the shutoff valve.
WARNING: Danger of property damage, bodily
injury or death.
Never use a match or open flame to test for
leaks. Never exceed specified pressures for
testing. High pressures may damage the gas
valve and cause overfiring which may result in
improper combustion and possible production of
carbon monoxide. Liquid Petroleum (L. P.) is
heavier than air and it will settle in any low area,
including open depressions, and it will remain
there unless area is ventilated. Never attempt
startup of unit before thoroughly ventilating area.