A. O. Smith Water Products Company
Service Handbook
Irving, Texas 2000©
Training Department
30
STEP 14. CHECK SUPPLY GAS PRESSURE
Attach monometer or gas pressure gauge to pressure tap on gas valve or use adapter to check pressure
ahead of valve as near as possible to valve.
IF…
THEN
proper supply gas pressure is present
go to Step
supply gas pressure is not between 4.5 and 14"
w.c. natural gas or 11.0 and 14" w.c. propane
adjust sup
minimum i
STEP 15. CHECK GAS PRESSURE TO MANIFOLD
TROUBLESHOOTING
STEP 14 - SUPPLY GAS PRESSURE TEST
BTH 150, 199 Propane
BTH 250 Natural
Gas Valve
BTH 150, 199 Natural
Gas Valve
BTH 120 Natural
Gas Valve
STEP 15 - GAS PRESSURE MANIFOLD TEST
IF…
TH
•pressure is not 3.5" w.c. ± 0.2" on natural gas or 10.0" on
propane gas on BTH 155, 199
•pressure is not 4.0" w.c. ± 0.2" natural gas or 10.0"
propane on BTH 120 or 250
rep
•pressure is 3.5" w.c. ± 0.2" natural gas or 10.0" w.c. ±
0.2" propane on BTH 155 or 199
•pressure is 4.0" w.c. ± 0.2" natural gas or 10.0" ± 0.3"
propane on BTH 120 or 250
ign
Summary of Contents for BTH 120
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