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FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK
FPSE 40 and 50 SERVICE AND OPERATION cant.
FPD 40 and 50 SERVICE AND OPERATION cant.
PILOT PROBLEMS
Trouble-
shooting cont.
The following are possible causes of pilot problems:
1. An open E.C.O. (high limit) will not allow the heater to relight. (See
page 49)
2. Incorrect pilot gas pressure: it should be 3.5" w.c. for natural gas. It
should be 10" w.c. for propane gas.
3. Incorrect excessive equivalent foot length on vents can cause pilot
outages.
4. Incorrect pilot position: The pilot should engulf the tip of the flame
sensor 3/8'1 to 1/2".
5. A leak in pilot tube will cause candling
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Troubleshooting
