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- Dual function fan delay timer
- Controls the circulating fan in heat pump, A/C and forced air systems
- OFF delay controls fan relay to purge ducts of residual air at the end of the heating/cooling cycle.
- ON delay allows air to reach the proper comfort level prior to energizing the fan.
Mode of Operation - Power must be applied at all times. Upon closure of the thermostat, the delay on make period begins. Once complete, the load is energized and remains energized as long as the initiate switch is closed. When the thermostat switch opens, the delay on break period begins. Once complete, the load is de-energized and all time delays reset. If the initiate contact re-closes during the delay on break period, the load remains energized and the delay on break period is reset. Removal of the input power resets all timing functions. Should the initiate contact open during the delay on make period, the delay on make period is reset to zero.
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