A.O. Smith 120 trough 500 - Manual (Page 54)

BTR TANK TYPE HEATERS
SERVICE WORKBOOK
A.O. Smith Water Products Service Handbook
Irving, Texas © 1999 Training Department
53
Is the system properly sized? yes no
Is the system properly installed? yes no
Are there any water leaks? yes no
Does the installation have a recirculating system? yes no
If so, is it operational? yes no
VI. PROPER SEQUENCE OF OPERATION
During standby does damper close on standby? yes no
During standby is pilot flame off? yes no
On a call for heat does thermostat close? yes no
On a call for heat does damper open completely? yes no
Does sparking begin at pilot? yes no
Is pilot flame established? yes no
If so, does sparking stop? yes no
Does main burner ignite? yes no
Does the thermostat satisfy? yes no
Does damper close? yes no
Comments:
VII. SAFETY
A. Gas
Does pilot flame prove before main burner ignites? yes no
Does damper blade fully open before ignition sequence occurs? yes no
Is burner cover plate in place? yes no
Is burner floor shield in place? yes no
Does IID lockout occur after 30 sec. trial for ignition? (Propane models only) yes no
B. Water Temperature
Is the thermostat adjusted to the lowest acceptable temperature?
yes no
Does the installation have a mixing valve? yes no
If so, is it operational? yes no
What is the outlet temperature of the mixing valve?
NOTE: (To minimize the risk of scalding, the manufacturer recommends storing water at 120°F.)
Is a properly rated temperature and pressure relief valve installed? yes no
C. Electrical
Is the 120 VAC electrical power supply properly wired?
yes no
Are all the BTR control covers in place? yes no
Is the 120 VAC electrical power supply properly fused? yes no
D. Flammables
Are flammable materials located in the area of the water heater?
yes no
Are flammable vapors located in the area of the water heater? yes no
Comments:
(This service checklist may be photo copied to assist with BTR service call.)