Atwood Mobile Products Water Heater Water Heater Exchanger User Manual

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Guides are only intended for use on Atwood
®
products by service technicians who have successfully completed
Atwood
®
training. This guide should be used in conjunction with the appropriate Instruction Manual provided with the
product and any applicable Industry standards. This is not intended to be a complete list. Please direct questions
concerning service of Atwood
®
products to 800-825-4328 before proceeding.
CAUSE SOLUTION
PILOT OUTAGE
Gas pressure incorrect --------------------------Set pressure to a minimum of 11˝ W.C. with two or more appliances running
Blocked “U” tube --------------------------------Remove obstruction
Improper main burner alignment --------------Re-align main burner and main burner orifice holder and gas valve
Improper air adjustment ------------------------Adjust main burner air shutter approximately 1/4 open
Weak thermocouple------------------------------Replace thermocouple
Poor pilot flame ----------------------------------Clean or replace pilot orifice
Weak gas control magnet ----------------------Replace gas control
Defective E.C.O. in control ----------------------Replace gas control and check the pilot flame. It should be high enough to engulf
the thermocouple at all times.
PILOT OUTAGE WHEN BUTTON OR KNOB IS RELEASED
Thermocouple not hot --------------------------Hold button or knob for 30 seconds before releasing
Thermocouple loose ----------------------------Tighten connection at gas control
Weak thermocouple------------------------------Replace thermocouple
Weak gas control magnet ----------------------Replace gas control
Defective E.C.O. in control ----------------------Replace gas control
MAIN BURNER WILL NOT IGNITE
Blocked main burner orifice --------------------Clean or replace orifice
Main burner flame spreader mis-alignment --Square flame spreader to end of main burner
Blocked main burner ----------------------------Remove blockage
Improper air adjustment ------------------------Adjust main burner air shutter approximately 1/4 open
Blocked “U” tube --------------------------------Remove blockage
Gas control out of calibration ------------------Replace gas control
ERRATIC MAIN BURNER FLAME
Improper gas pressure --------------------------Set inlet pressure to a minimum of 11˝ W.C. with two or more appliances running
Improper air adjustment ------------------------Adjust main burner air shutter approximately 1/4 open
Partial blockage of main burner----------------Remove blockage
Partial blockage of main burner orifice--------Clean or replace orifice
Flame spreader misaligned----------------------Re-align spreader or replace main burner
Blockage in “U” tube ----------------------------Remove blockage
Poor gas supply----------------------------------Replace gas supply
Exhaust grille blocked --------------------------Remove blockage
Improper main burner alignment --------------Re-align main burner, main burner orifice holder and gas valve
SMOKING AND SOOTING
Gas pressure incorrect --------------------------Set pressure to a minimum of 11˝ W.C. with two or more appliances running
Poor gas supply----------------------------------Replace gas supply
Improper pilot flame ----------------------------Clean or replace pilot orifice
Improper air adjustment ------------------------Adjust main burner air shutter approximately 1/4 open
Flame spreader mis-aligned --------------------Re-align or replace main burner
Blocked main burner ----------------------------Remove blockage
Improper main burner alignment --------------Re-align main burner, main burner orifice holder and gas valve
Blocked “U” tube --------------------------------Remove blockage
INSUFFICIENT WATER TEMPERATURE
Temperature selector out of place--------------Re-set to desired position
Bypass levers improperly positioned ----------Reposition levers
Improper air adjustment ------------------------Adjust main burner air shutter approximately 1/4 way open
Partial main burner blockage ------------------Remove blockage
Improper main burner adjustment ------------Re-align main burner and main burner orifice holder
Flame spreader mis-aligned --------------------Re-align or replace main burner
Blocked “U” tube --------------------------------Remove blockage
Pilot Water Heater
TROUBLE SHOOTING GUIDE
Effective: 5/26/98

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