Johnson Controls A11 Series Data Sheet
Code No. LIT-1927005
Issued November 13, 2015
A11 Series Low Temperature Cutout Controls
Description
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.
The A11 Controls are compact and sturdy and feature an adjustable range with a fixed differential. The range adjustment screw is accessible at the bottom of the control or at the top, when the cover is removed. A factory-set low temperature stop is available when specified.
Refer to the A11 Series Low Temperature Cutout Controls Product Bulletin (LIT-125010) for important product application information.
Features
•precision repeat accuracy 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)
•trip-free manual reset allows the lever to reset. You must press and release the lever before operation resumes.
•precision snap-acting contacts in a dust protected enclosure enables the A11 Control to operate to the fullest potential
•direct reading scale provides easy-to-adjust setpoint. Adjustments can be made from the top or bottom of the control.
Repair Information
If the A11 Series Low Temperature Cutout Control fails to operate within its specifications, replace the unit. For a replacement control, contact the nearest Johnson Controls® representative.
A11 Series Low Temperature
Cutout Control
Electrical Rating
Motor Rating |
120 V |
208 V |
240 V |
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Motor Description |
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AC Full Load Amperes |
16.0 |
9.2 |
8.0 |
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AC Locked Rotor Amperes |
96.0 |
55.2 |
48.0 |
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Non-Inductive Amperes |
16.0 |
9.2 |
8.0 |
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Pilot Duty |
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125 VA, 24 to 277 VAC |
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Selection Chart
Model |
Description |
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A11A |
SPST, open low, manual reset |
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A11B |
SPST, open low, automatic recycle |
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A11D |
SPDT, manual reset |
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A11E |
SPDT, automatic recycle |
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A11 Series Low Temperature Cutout Controls Dimensions, in. (mm)
The performance specifications are nominal and conform to acceptable industry standards. For applications at conditions beyond these specifications, consult the local Johnson Controls office. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2015 Johnson Controls, Inc. www.johnsoncontrols.com
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A11 Series Low Temperature Cutout Controls (Continued) |
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Technical Specifications |
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A11 Low Temperature Cutout Controls |
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Product Codes |
A11A: SPST, open low, manual reset |
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A11B: SPST, open low, automatic recycle |
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A11D: SPDT, manual reset |
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A11E: SPDT, automatic recycle |
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Range Cutout |
35 to 45°F (2 to 7°C) |
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Differential |
A11A and A11D: Temperature must be 12°F (6.7°C) above cutout point before control can be reset. |
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A11B and A11E: 12°F (6.7°C) |
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Ambient Temperature |
Minimum: 0°F (-18°C) |
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Maximum: 140°F (60°C) |
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Maximum Temperature at Bulb |
250°F (121°C) |
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Sensing Element |
1/8 in. x 20 ft (3 mm x 6.1 m) or 1/8 in. x 40 ft (3 mm x 12.2 m) |
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Capillary Length |
4 ft (1.2 m) |
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Switch |
Snap-acting contacts in dust-protected enclosure |
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Material |
Case: 0.6 (2 mm) cold rolled steel |
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Cover: 0.3 in. (1 mm) cold rolled steel |
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Finish |
Galvanized steel |
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Conduit Opening |
22 mm (9/10 in.) hole for 13 mm (1/2 in.) conduit |
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Mounting Bracket |
Standard on all controls |
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Shipping Weight |
Individual pack: 1.8 lb (0.8 kg) |
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Overpack of 20 units: 38 lb (17 kg) |
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Electrical Rating |
Pilot Duty: 125 VA, 24 to 277 VAC |
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Motor Ratings |
AC Full Load Ampere: 120 V = 16.0 A, 208 V = 9.2 A, 240 V = 8.0 A |
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AC Locked Rotor Ampere: 120 V = 96.0 A, 208 V = 55.2 A, 240 V = 48.0 A |
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Non-Inductive Ampere: 120 V = 16.0 A, 208 V = 9.2 A, 240 V = 8.0 A |
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Compliance |
United States |
UL Listed, File SA516, SDFY |
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FCC Compliant to CFR 47, Part 15 Subpart B, Class A |
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Canada |
UL Listed, CSA Class No. 1222 01, File LR948 |
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Industry Canada, ICES-003 |
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The performance specifications are nominal and conform to acceptable industry standards. For applications at conditions beyond these specifications, consult the local Johnson Controls office. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2015 Johnson Controls, Inc. www.johnsoncontrols.com
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