A.O. Smith BTH 120 Service Handbook - Troubleshooting
Other manuals for BTH 120:
Service handbook
Manual is about: COMMERCIAL GAS HIGH EFFICIENCY WATER HEATERS BTH 120 THRU 500
SERIES 200/201
of
65
A. O. Smith Water Products Company
Service Handbook
Irving, Texas 2000
©
Training Department
23
STEP 7. 24 VAC THRU ECO (ECO IS NOT A THERMISTOR).
Reinstalled plug.
Check for 24 VAC from back of red 1 plug to ground.
IF ...
TH E N
24 V A C is no t pres ent
rep lac e
24 V A C is pre s en t
go to s t
N ote : R es is tan c e th ru E C O - p lug red 1 to p lug red 4 - is .5 o
TROUBLESHOOTING
STEP 7 - TEST FOR 24 VAC THRU ECO
IF…
THEN
24 VAC is not present
24 VAC is present
replace
go to St
STEP 6. (continued)