H
ARGROVE
M
ANUFACTURING
C
ORPORATION
S
AFETY
P
ILOT
C
ONTROL
T
ROUBLE
S
HOOTING
G
UIDE
POSSIBLE CAUSES:
1) Nature of Trouble: Pilot light won't light.
1a)
Gas supply off.
1b)
Air in line.
1c)
Kink in line.
2) Nature of Trouble: Pilot light won't stay lit after releasing knob.
2a)
Line from thermocouple is not
making good contact with valve.
2b)
Pilot light flame is too strong and
blows itself out.
2c)
Pilot light flame is too low and
does not transmit enough electricity to
pilot valve.
2d)
Pilot light flame hits
thermocouple too close to cold junction.
2e)
Bad thermocouple.
3) Nature of Trouble: Pilot light goes out after being lit.
3a)
Down drafts blowing out flame.
3b)
Pilot light flame is too strong and
blows itself out.
3c)
Pilot light flame is too low and
does not transmit enough electricity to
pilot valve.
3d)
Pilot light flame hits
thermocouple too close to cold junction.
4) Nature of Trouble: Pilot light is noisy.
4a)
Pilot light flame is too strong.
CORRECTIVE ACTIONS
1a)
Turn gas supply on.
1b)
Bleed gas through ember burner until all the air is out of the
line. Bleeding through the pilot burner is not effective.
1c)
Straighten the tubing and assure there are no cracks in the
tubing, or replace the tubing.
2a)
Tighten fitting that connects thermocouple line to the pilot
control valve.
2b)
Adjust the flame on the pilot burner in accordance with the
pilot control instructions, or replace the pilot orifice with a larger
orifice.
2c)
Adjust the flame on the pilot burner in accordance with the
pilot control instructions, or replace the pilot orifice with a larger
one.
2d)
A cold junction is located on the lower 1/3 of the
thermocouple. The pilot light flame must hit only the top 1/4 of the
thermocouple or the cold junction will overheat and shut the
system off.
2e)
Replace the thermocouple. This is unlikely on a new set as
all thermocouples have been factory tested before shipping.
3a)
Correct chimney down draft problems.
3b)
Adjust the flame on the pilot burner in accordance with the
pilot control instructions, or replace the pilot orifice with a larger
orifice.
3c)
Adjust the flame on the pilot burner in accordance with the
pilot control instructions, or replace the pilot orifice with a larger
one.
3d)
A cold junction is located on the lower 1/3 of the
thermocouple. The pilot light flame must hit only the top 1/4 of the
thermocouple or the cold junction will over heat and shut the
system down.
4a)
Adjust the flame on the pilot burner in accordance with the
pilot control instructions, or replace the pilot orifice with a larger
orifice.
