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WIRING
INLET
TERMINALS
PRESSURE TAP
TH
HI/LO
OUTLET
PRESSURE TAP
REGULATOR
Fig. 3. Top view of gas valve with HI/LO regulator.
WIRING
Follow the wiring instructions furnished by the appliance
manufacturer, if available, or use the general instructions
provided below. Where these instructions differ from the
appliance manufacturer, follow the appliance
manufacturer instructions. For typical wiring diagrams,
see Fig. 6.
All wiring must comply with applicable electrical codes
and ordinances.
Disconnect power supply before making wiring
connections to prevent electrical shock or equipment
damage.
GAS
CONTROL KNOB
M10926
APPLY WRENCH
FROM BOTTOM OF
GAS CONTROL TO
SHADED AREA
Fig. 5. Proper use of wrench on gas valve.
VS8521 VENTFREE MILLIVOLT GAS VALVE
WIRING
INLET
TERMINALS
PRESSURE TAP
TH
OUTLET
PRESSURE REGULATOR
PRESSURE
ADJUSTMENT (UNDER
TAP
CAP SCREW)
Fig. 4. Top view of gas valve with standard regulator.
1. Check the power supply rating on the gas valve
and make sure it matches the available supply.
Install the transformer, thermostat, and other
controls, as required.
2. This valve can be used only in a self-generating
system.
3. Adjust the thermostat heat anticipator to the 0.1A
at 750 mV rating stamped on the valve operator.
3
GAS
CONTROL
KNOB
M10927
M6916
69-1223—1
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