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Thermocouple or Thermopile Performance
Thermocouples and thermopiles require proper temperature differential between the hot junction
(tip) and cold junction (base) to provide satisfactory operation of millivoltage gas controls.
Thermocouples and thermopiles perform less effectively when exposed to excessive cold-junction
or hot-junction temperatures.
Excessive cold-junction temperatures can be caused by heat radiation from adjacent surfaces
or high ambient air temperature. Excessive cold-junction temperatures can be eliminated by
shielding the pilot flame or construct a shield to direct secondary air over the pilot burner base.
STaRTuP aND CHECkOuT
Perform Gas leak Test
1. Ensure that the gas supply is turned on at the appliance supply valve.
2. Paint the pipe connections upstream from the pilot burner with a rich soap and water solution.
Bubbles indicate a gas leak.
WaRNING
FIRE OR EXPlOSION HazaRD.
CaN CauSE PROPERTY DamaGE, SERIOuS INjuRY OR DEaTH.
CHECk FOR GaS lEakS WITH SOaP aND WaTER SOluTION aNY TImE
WORk IS DONE ON a GaS SYSTEm.
3. If a leak is detected, tighten the pipe connections.
4. Stand clear of the main burner while lighting to prevent injury from hidden leaks that could
cause flashback in the appliance combustion chamber. Light the main burner.
5. With the main burner in operation, paint the pipe joints (including the adapters) and gas control
inlet and outlet with a rich soap and water solution.
6. If another leak is detected, tighten the tubing and pipe connections.
7. Replace the part if the leak can not be stopped.
adjust Pilot Flame
The pilot flame should envelop 3/8 in to 1/2 in (10 mm to 13 mm) of the thermocouple or thermopile
tip.
To adjust the pilot flame turn the pilot adjustment screw on the gas control clockwise to decrease
or counterclockwise to increase the pilot flame.
Ignite Pilot Burner
1. Before lighting the pilot burner, turn the thermostat (if equipped) to its lowest setting. Wait for
unburned gas to vent.
NOTE:
LP gas is heavier than air and does not vent upward. Smell for LP gas next to the floor. If
odor of gas is present, shut off main gas in the gas piping or at the tank. Perform the Gas
Leak Test to recheck the connections.
2. Light the pilot burner according to the appliance manufacturer Instructions.
WaRNING
FIRE OR EXPlOSION HazaRD.
CaN CauSE PROPERTY DamaGE, SERIOuS INjuRY OR DEaTH.
PERFORm GaS lEak TEST aNYTImE WORk IS DONE TO THE SYSTEm.
SERvICE
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