ATTENTION
This procedure is to be done once a year prior to the heating
season. Anytime the heater is moved from one job location
to the next, or after servicing the heater.
MATERIALS REQUIRED
(To be secured through local purchase)
Quantity
Description
1
High Pressure Gas Gauge capable of
reading up to 35 PSIG
1
1/4 in. Tee
1
1/4 in. Nipple
A. PREPARATION
1. Close fuel supply valve at LP gas supply container.
2. Allow heater to burn off gas remaining in it’s gas
supply line..
3. Close manual main burner valve on heater.
4. Remove gas hose from heater.
5. Remove hose adapter from inlet of pilot safety control
valve.
B. GAUGE INSTALLATION
1. Connect the following materials together in the order
as given. See Fig. 14.
-- Tee to inlet of pilot safety control.
-- Nipple to tee.
-- Hose adapter (as removed earlier) to nipple.
-- Gas hose to hose adapter.
2. Tighten all connections securely.
3. Connect gauge to tee.
C. READING PRESSURES
1. Start the heater. With the heater operating, the
pressure gauge should read the pressure specified
on the dataplate or in the specification section of this
owner’s manual.
2. Does the pressure reading at the inlet of the safety
control agree with that given on the dataplate? If so,
no further checking or adjustment is required.
Proceed to section D.
3. If the inlet pressures do not agree with that specified
on the dataplate, then check the following:
-- Improper regulator for heater.
-- Blockage in gas hose.
-- Insufficient size or quantity of LP gas supply
containers.
D. COMPLETION
1. Once the proper inlet pressure has been confirmed,
close fuel supply valves.
2. Allow heater to burn off fuel remaining in gas supply
line.
3. Remove gauge, hose adapter, nipple and tee.
4. Reconnect hose adapter to inlet of safety control
valve and hose to hose adapter.
5. Tighten all connection securely and check for gas
leaks.
Gas Pressure Checks
WARNING
■
Do not disassemble the pilot safety control valve.
■
Do not attempt to replace any components of the pilot
safety control valve.
■
The pilot safety control must be replaced if any
physical damage occurs to it.
■
Failure to follow this warning will result in fire or
explosions, leading to injury or death, and building
damage.
13
HIGH PRESSURE GAUGE
HOSE
NIPPLE
TEE
PILOT
CONTROL
VALVE
HOSE ADAPTER
(FROM PILOT VALVE INLET)
FIG. 14
■
Use only a soft brush, dry rag, or compressed air to
clean the burner and pilot orifices.
■
Do not push instruments into burner or pilot orifice
holes. Doing so may enlarge or distort the holes
creating improper combustion, pilot outages, or burner
flames extending beyond the heater case.
■
Ensure the pilot orifice screen is installed prior to orifice
assembly. Its purpose is to trap contamination that
would prevent the pilot orifice from operating properly.
■
Do not use pliers to loosen or tighten heater
components. Doing so may round off the component
creating service problems. Always use the appropriate
wrench.
