A.O. Smith 120 trough 500 - Manual (Page 34)

BTR TANK TYPE HEATERS
SERVICE HANDBOOK
A.O. Smith Water Products Service Handbook
Irving, Texas ©2000 Training Department
33
STEP 12 IID MODULE TEST
STEP 12. IID MODULE TEST (Power to the Pilot Valve). Using a multimeter, test for
24 VAC between terminal PV and 24V (GND) on the IID during the 90 second trial for
ignition.
IF THEN
The meter does not read 24 VAC and the
IID module is not between ignition trials: • Replace the module.
The meter does read 24 VAC: • Go to step 13