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Compounds used on threaded joints of gas piping shall be resistant to the
action of liquefied petroleum gases. The gas lines must be checked for
leaks by the installer. This should be done with a soap solution watching
for bubbles on all exposed connections, and if unexposed, a pressure test
should be made.
Never use an exposed flame to check for leaks. Appliance must be
disconnected from piping at inlet of control valve and pipe capped
or plugged for pressure test. Never pressure test with appliance
connected; control valve will sustain damage!
A gas valve and ground joint union should be installed in the gas line
upstream of the gas control to aid in servicing. It is required by the
National Fuel Gas Code that a drip line be installed near the gas inlet.
This should consist of a vertical length of pipe tee connected into the gas
line that is capped on the bottom in which condensation and foreign
particles may collect.
Figure 10
Method of Installing a Tee Fitting Sediment Trap (Figure 10)
The use of the following gas connectors is recommended:
— ANS Z21.24 Appliance Connectors of Corrugated Metal Tubing
and Fittings
— ANS Z21.45 Assembled Flexible Appliance Connectors of Other
Than All-Metal Construction
The above connectors may be used if acceptable by the authority having
jurisdiction.
Pressure Testing of the Gas Supply System
1. To check the inlet pressure to the gas valve, a 1/8" (3mm) N.P.T.
plugged tapping, accessible for test gauge connection, must be
placed immediately upstream of the gas supply connection to the
appliance.
2. The appliance and its appliance main gas valve must be discon-
nected from the gas supply piping system during any pressure testing
of that system at test pressures in excess of 1/2 psig (3.5 kPa).
3. The appliance must be isolated from the gas supply piping system
by closing its equipment 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).
Attention! If one of the above procedures results in pressures in excess
of 1/2 psig (14" w.c.) (3.5 kPa) on the appliance gas valve, it will result
in a hazardous condition.
Checking Manifold Pressure
Natural gas will have a manifold pressure of approximately 6.0" w.c.
(1.49kPa) at the pressure regulator outlet with the inlet pressure to the
pressure regulator from a minimum of 7.0" w.c. (1.743kPa) for the
purpose of input adjustment to a maximum of 10.5" w.c. (2.615kPa).
Propane/LP gas will have a manifold pressure approximately 10.0" w.c.
(2.49kPa) at the pressure regulator outlet with the inlet pressure to the
pressure regulator from a minimum of 11.0" w.c. (2.739kPa) for the
purpose of input adjustment to a maximum of 13.0" w.c. (3.237kPa).
Page 8
A test gage connection is located downstream of the gas appliance
pressure regulator for measuring gas pressure. The connection is a 1/8
inch (3mm) N.P.T. plugged tapping.
High Altitudes
For altitudes/elevations above 2,000 feet (610m) ratings should be
reduced at the rate of 4 percent for each 1,000 feet (305m) above sea
level. Contact the manufacturer or your gas company before changing
spud/orifice size.
Piezo Pilot Ignitor Instructions
Depressing the ignitor button completely causes a spark to occur at the
pilot.
To light the pilot, it is important that the electrode be 1/8" (3mm) from
the pilot. The spark must occur at the point the pilot flame hits the
thermocouple.
On a new installation with air in the gas line, it is suggested that a match
be used. The match will light the pilot faster than the piezo under this
condition.
Keep appliance area clear and free from combustible materials,
gasoline and other flammable vapors and liquids.
APPLIANCE MAINTENANCE INFORMATION
FOR QUALIFIED SERVICE PERSON
Removing Pilot/Thermocouple From Main Burner Assembly
Attention: The thermocouple CAN NOT be replaced as an individual
item. You must order a new pilot when replacing thermocouple.
1. Turn OFF gas supply to the heater.
2. Turn OFF electrical supply to the heater if optional blower is
installed in heater.
3. Remove lower louver from casing assembly (2 screws).
4. Remove reflector from casing assembly (2 screws).
5. Disconnect pilot tubing from pilot (see Figure 13, Page 9). Grasp nut
A with a wrench when removing nut B with a second wrench.
6. Remove pilot from pilot bracket (2 screws).
7. Remove thermocouple lead from gas valve.
8. As parts are being replaced in reverse order, check for gas leaks at
all gas connections before lower louver is replaced onto casing
assembly.
Removing Main Burner Orifice(s) From
Main Burner Assembly
1. Turn OFF gas supply to the heater.
2. Turn OFF electrical supply to the heater if optional blower is
installed in heater.
3. Remove lower louver from casing assembly (2 screws).
4. Remove reflector from casing assembly (2 screws).
5. Remove pilot bracket from main burner assembly (2 screws).
6. Pivot pilot bracket with attached pilot away from main burner
assembly (do not damage pilot tubing).
7. Disconnect supply tubing from orifice holder(s).
8. Remove orifice holder from venturi of main burner assembly (1
screw for each orifice holder).
9. Remove main burner orifice from orifice holder. Attention: The
number stamped on the main burner orifice is a millimeter
diameter.
10. As parts are being replaced in reverse order, check for gas leaks at
all gas connections before lower louver is replaced onto casing
assembly.
Removing Gas Valve From Casing Assembly
1. Turn OFF gas supply to the heater.
2. Turn OFF electrical supply to the heater if optional blower is
installed in heater.
3. Remove lower louver from casing assembly (2 screws).
4. Remove reflector from casing assembly (2 screws).
5. Remove upper louver from casing assembly (2 screws).
6. If installed, remove optional blower assembly (4 screws).
7. Disconnect inlet supply tubing, outlet supply tubing, pilot supply
tubing and thermocouple lead from gas valve.
8. If heater is attached to wall, disconnect gas supply line from inlet
regulator.
R-5210