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Phason Support Forum » Frequently asked questions (FAQs) » Single stage controls »  Hysteresis on single stage controls

Hysteresis on single stage controls

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1 Hysteresis on single stage controls on 2014-04-02, 2:18 pm

Hysteresis is 1 degree Fahrenheit (0.5 degrees Celsius) on Phason controls that have a fixed hysteresis. 

These controls include MTC-3C, MTC-4C, SSC-1D, VTC-1D and FHC-1D.

Hysteresis is the number of degrees between the turn-on and turn-off points of a control. 
For example, an SSC-1D set for 'cool' with a setpoint of 70F will turn on the fan at 70F as the temperature rises. It will turn it off at 69F as the temperature drops.

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