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Description
A11 Series low temperature cutout controls are available with SPDT or SPST contact action. Typical applications include the
sensing of low temperature conditions to avoid overcooling or icing of hydronic coils, cooling coils and liquid handling pipes.
The controls are compact and sturdy, and have an adjustable temperature set point range with a fixed differential. The range
adjustment screw is accessible at the bottom of the control, and at the top of the control when the cover is removed.
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.
Features:
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.
Features:
- 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
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