High-Efficiency Commercial Gas Series - Service Manual
Technical Literature Department
6
Ashland City, Tennessee © 2008
Servicing should only be performed by a Qualified Service Agent
GAS VALVE 120 KBtu/hr MODEL
GAS VALVE 150 KBtu/hr MODEL
The gas control valve on the 150 KBtu/hr
model is 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
the “ON” position.
The gas control valve on the 120 KBtu/hr
model 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).
