American ABCG3, Installation, Operation And Maintenance Instructions

31

OPERATIONAL CHECKLIST

This checklist in conjunction with “TROUBLESHOOTING” and the “SEQUENCE OF OPERATION” should be used as an on-the-job 

troubleshooting guide to identify the cause of incorrect system operation and suggest a remedy for its correction.  Because improper 

piping and wiring can result in unsatisfactory system performance, it is suggested that the installation by examined before using the 

checklist.  Be sure to refer to the correct piping and wiring diagram for the type of system that is installed.

                       REMEDY

COMPLAINT 

CAUSE 

USER 

SERVICE AGENT

*Water not hot enough. 

Thermostat set too low. 

Set thermostat dial to 

a higher temperature. 

Thermostat out of calibration.  Call service agent. 

 Recalibrate thermostat. 

If thermostat cannot be  

recalibrated, replace.

*Insufficient hot water 

Thermostat set too low. 

Set thermostat dial to a

*See WATER TEMPERATURE 

 higher temperature.

WARNING (on page 27) 

Thermostat out of calibration.  Call service agent. 

Recalibrate thermostat.  If 

thermostat cannot be recalibrated,

replace.

Main manual gas shutoff 

Open main manual gas

valve partially closed. 

shutoff valve to fullest extent. 

Heater too small for demand.  Space usage to give heater

time to restore water 

temperature.

Thermostat differential is  

Call service agent. 

Replace dual bulb controller if 

too wide.   

differential is greater than 4°F.

Heater recovery is slower. 

Call service agent. 

Check gas input.  If incorrect,  

adjust gas pressure or replace

main burner orifice.

Draft hood not installed or 

Call service agent. 

Install draft hood or baffles as 

one or more flue baffles. 

furnished with unit.

Water temperature too hot. 

Thermostat set too high. 

Set thermostat to a 

lower setting.

Heater makes sounds: sizzling. 

Condensation on outside of 

tank - normal.

Rumbling.  

Sediment accumulation on 

Drain a quantity of water

bottom of tank. 

through drain valve.  If  

Delime heater.

rumbling persists, call 

a service agent.

Ticking or metallic sounds. 

Expansion and contraction- 

normal.

Pounding.  

Air chambers in piping have  Drain piping system and 

become waterlogged. 

refill.  Heater must be off

while this is being done.

Combustion noises. 

Too much primary air. 

Adjust shutters.

Overfired heater.  Incorrect 

burners or orifice for types 

Call serviceman. 

Check and correct as necessary.

of gas used.

Water leaks. 

Drain valve not closed tightly.  If drain valve cannot be 

closed tightly, replace.

If leakage source cannot be  Shut off gas supply to heater  Repair or in case of suspected 

corrected or identified, call 

and close cold water inlet 

tank leakage, be certain to confirm

service agent. 

valve to heater. 

before replacing heater.

Gas odors. 

Heater is overfired. 

Shut off gas supply to 

Check for sooted flue passage.

heater and call service agent.  Check for obstructed vent line.

Check backdraft or lack of draft.

Draft hood may be improperly 

installed or not sized properly.

Possible gas leaks. 

Shut off gas supply to 

heater and call gas 

company at once.