Self-operated modulating valves – GSI Outdoors PNEG-377 User Manual
Page 89
89
Fan and Heater
SELF-OPERATED MODULATING VALVES
Adjustment
Adjust the valve close-off point by turning the "T"
handle on top of the range spring housing.
When the handle is turned in (clockwise) a high
bulb temperature is required to close the valve.
Turn the handle ou (counterclockwise) when a
lower temperature is desired.
The operator can set the valve to be fully closed at
any temperature within its range. The gage on the
V50B valves is an integral lpart of the temperature
sensing element and helps the operator make
accurate settings.
Checkout Procedure
Check for gas leaks with a soap solution at the
piping connections and around valve gaskets.
Check for minimum fire stability-ifunstable use
next larger orifice from kit PLG14A-600R.
Before leaving the installation, observe at least
three complete operating cycles to be sure that all
components are functioning correctly. Gas pres-
sure through the valve should be verified by an
accurate gage.
Repairs and Replacement
The internal parts, orifice plug, diaphargms and
sensing elements may be replaced. Other field
repairs must not be made. When ordering a re-
placement valve or sensing element, specify
Product Number shown on valve. Replacement
parts and valves may be obtained through the
nearest Johnson Controls wholesaler.
CAUTION: Check all joints for leaks with a soap
solution after valve has been repaired.
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Replacement Parts
*Includes deat, disc, diaphragms and all internal parts to reconditon valve.