Controls - Gas Valve Suf 120; Controls - Gas Valve Suf 150 - State Water Heaters SUF 130 THRU 500 User Manual

CONTROLS – GAS VALVE SUF 120
The gas control valve on the SUF 120 has a built-in adjustable pressure regulator. The adjustment screw is
accessed by removing the cap screw market regulator in the illustration.
Inlet gas pressure may be read at the inlet pressure tap only if the manual shut off valve (gas cock) is in
the "ON" position. Leaving the knob in the "OFF" position will not allow the burner to fire and will generate a
fault code on the UIM (Universal Interface Module).
CONTROLS – GAS VALVE SUF 150
The gas control valve on the SUF 150 has a built-in pressure regulator. The regulator may be adjusted by
removing the cap screw marked "regulator" in the illustration.
Inlet gas pressure may be read at the inlet pressure tap only if the manual switch is set to the "ON"
position.
32 Servicing should only be performed by a Qualified Service Agent