Johnson Controls A11A Product Bulletin

A11 Series Low Temperature Cutout Controls
Product Bulletin
A11A, A11B, A11D, A11E
A11 Series low temperature cutout controls are
available with Single-Pole, Single-Throw (SPST) or
Single-Pole, Double-Throw (SPDT) contact action.
Typical applications include the sensing of low
temperature conditions to avoid over cooling or icing of
hydronic coils, cooling coils, and liquid-handing pipes.
The controls are compact and sturdy, and have an
adjustable temperature setpoint 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.
Table 1: Features and Benefits
Features
Precision Repeat Accuracy
Trip-Free Manual Reset
Recision Snap-Acting Contacts in a Dust
Protected Enclosure
Direct Reading Scale
Refer to the
Benefits
Remains 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).
Allows the lever to reset. You must press and release the lever before
operation resumes.
Enables the A11 to operate to the fullest potential.
Provides easy to adjust setpoint. Adjustments can be made from the
top or bottom of the control.
A11 Series Low Temperature Cutout Controls Product Bulletin
QuickLIT website for the most up-to-date version of this document.
Figure 1: A11 Series Low Temperature
Cutout Control
1
Code No. LIT-125010
Issued April 2018