- Gas valves include manual valve, two automatic operators, servo pressure regulator and pilot adjustment
- Provide two automatic valves
- Solenoid-operated first automatic valve opens on thermostat call for heat; closes when call for heat ends
- Diaphragm-operated second automatic valve opens under control of regulator; closes if gas or power supply is interrupted
- All adjustments, wiring connections and pilot outlet are accessible from top of control
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