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ULTRAFORCE COMMERCIAL GAS WATER HEATER
SUF 120 thru 400 SERVICE HANDBOOK
State Water Heaters – Technical Training Department 25 Ashland City, Tennessee © 2009
Servicing should only be performed by a Qualified Service Agent 198152-002
CONTROLS – GAS VALVE SUF 199 and 250
Pressure readings may be taken on the gas
valve by connecting to the pressure ports on
the valve. The manifold pressure on this
valve is 0”w.c. (0kPa) when the water heater
is running. Refer to the gas pressure chart on
page 4.
Note: Tubing shown on pressure connections
is installed for manometer connections. It is
not supplied with the water heater.
Manifold
gas
Pressure
0” WC
(0kPa)
Supply
gas
pressure
WARNING: Do not attempt adjustments on
this gas valve unless you have a
combustion analyzer. Contact the “help
line” listed on the water heater for
assistance.