L.B. White I-3 Infraconic - Manual (Page 19)

18
READ THIS ENTIRE SECTION BEFORE
BEGINNING TO TROUBLESHOOT PROBLEMS.
The following troubleshooting flow charts provide systematic
procedures for isolating heater problems. The charts are
intended for use by a QUALIFIED GAS HEATER SERVICE
PERSON. DO NOT SERVICE THE HEATER UNLESS YOU HAVE
BEEN PROPERLY TRAINED.
TEST EQUIPMENT REQUIRED
The following pieces of test equipment will be required to
troubleshoot this system with minimal time and effort.
• Digital Multimeter - For measuring DC voltage when using
thermocouple diagnostic kit.
• Millivolt Test Kit - (Part # 21188) When used with a
standard digital multimeter, this kit allows testing of the
thermocouple and electromagnetic power unit.
• Pressure Gauge - (Part # 20736) For checking inlet
pressures to the heaters.
INITIAL PREPARATION
-- Inspect heater for damage.
-- Clean heater as necessary.
Heater Problems Page
1. Inner combustion cone will not light . . . . . . . . . . . . . . . .19
2. Outer combustion cone does not heat up on
high thermostatic head setting . . . . . . . . . . . . . . . . . . . .19
3. Inner combustion cone lights,
but will not stay lit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
4. Heater backflashes gas through injector body
air inlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
5. Heater does not return to
low heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Components should be replaced only after each step has
been completed and replacement is suggested in the flow
chart.
Troubleshooting Guide
WARNING
Burn Hazard
■
Troubleshooting this system may require operating the
heater with the burner on. Use extreme caution when
working on the heater.
■
Failure to follow this warning will result in burns
causing severe injury.