Precision "repeat" accuracy. Unaffected by ambient temperature at the control diaphragm cup and 4 ft. (1.2 m) capillary (20 ft. [6.1 m] sensing bulb must be in the controlled area). Direct reading scale is calibrated at Johnson Controls', Goshen, Indiana plant (800 ft. [244 m] above sea level) at 35°F (2°C). Critical installations at higher altitudes should be set "higher" on the basis of 1F° (0.56C°) for each 1800 ft. (549 m) of elevation.
- Provides monitoring of the face temperature of evaporator coils for freeze protection
- Snap-acting SPST switch
- External temperature scale
- Easy setpoint adjustment
- Galvanized mounting brackets and cover
- Differential: 8°F