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2. The appliance and its appliance main gas 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 (3.5 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 3.5" w.c.
(.871kPa) for maximum input or 1.7" w.c. (.423kPa) for minimum input
at the pressure regulator outlet with the inlet pressure to the pressure
regulator from a minimum of 5.0" w.c. (1.245kPa) for the purpose of
input adjustment to a maximum of 10.5" w.c. (2.614kPa). Propane gas
will have a manifold pressure approximately 10.0"w.c. (2.49kPa) for
maximum input or 6.3"w.c. (1.568kPa) for minimum input 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).
NOTE: The gas control is equipped with a captured screw type pressure
test point, therefore it is not necessary to provide a 1/8" test point up
stream of the control.
A test gauge 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.
Keep appliance area clear and free from combustible materials,
gasoline and other flammable vapors and liquids.
Pilot Flame Pattern (Figure 12 and Figure 13)
Figure 12 shows a correct pilot flame pattern. The correct flame will be
blue and will extend beyond the thermocouple and thermopile. The flame
will surround the thermocouple and thermopile just below the tip. A slight
yellow flame may occur where the pilot flame and main burner flame
meet. Figure 13 shows an incorrect pilot flame pattern. The incorrect
pilot flame is not touching the thermocouple or thermopile. This will
cause the thermocouple or thermopile to cool. When the thermocouple
cools, the heater will shut down.
Correct Pilot Flame Pattern
Figure 12
Page 10
Incorrect Pilot Flame Pattern
Figure 13
If pilot flame pattern is incorrect, as shown in Figure 13
•
See Troubleshooting, page 15.
Cleaning and Maintenance/Pilot
Oxygen Depletion Sensor Pilot (Figure 14)
When the pilot has a large yellow tip flame, clean the Oxygen Depletion
Sensor as follows:
1. Clean the ODS pilot by loosening nut B from the pilot tubing. When
this procedure is required, grasp nut A with an open wrench.
2. Blow air pressure through the holes indicated by the arrows. This
will blow out foreign materials such as dust, lint and spider webs.
Tighten nut B also by grasping nut A.
Figure 14
R-3451
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