A.O. Smith FPS 75 - Main Burner Problems

FPS/FPSE/FPD TECHNICAL TRAINING AND SERVICE WORKBOOK
FPS 40 and 50 SERVICE AND OPERATION cant.
MAIN BURNER PROBLEMS
Trouble-
shooting cont.
The following are possible causes of main burner problems:
1. Unlevel burner will cause yellow flames
2. Burning and the orifice indicates main gas valve may not be fully
closing.
3. Incorrect manifold gas pressure; it should be 3.5" for natural gas and 10"
for propane.
4. Soot build-up. Check gas pressure and air flow through heater and
venting.
@1995
A.D. Smith
Water Products Co.
Technical Information
IrvinQ, Texas
39