Johnson Controls A11A Manuale utente
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A11 Series Low Temperature Cutout Controls Product Bulletin
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.
Figure 1: A11 Series Low Temperature
Cutout Control
Table 1: Features and Benefits
Features Benefits
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.
Recision Snap-Acting Contacts in a Dust
Protected Enclosure Enables the A11 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.
A11 Series Low Temperature Cutout Controls
Product Bulletin
A11A, A11B, A11D, A11E Code No. LIT-125010
Issued April 2018
A11 Series Low Temperature Cutout Controls Product Bulletin
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Overview
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.
Figure 2 shows the A11 dimensions. Figure 2
describes theA11 electrical ratings.
Table 2: Electrical Rating
Motor Rating 120 V 208 V 240 V
Motor Description
AC Full Load Amperes 16.0 9.2 8.0
AC Locked Rotor Amperes 96.0 55.2 48.0
Non-Inductive Amperes 16.0 9.2 8.0
Pilot Duty - 125 VA, 24 to 277 VAC
.27
72.30
58
1.38
35
.69
17
2.33
59 .34
9
.97
25
2.25
57
2.11
54 4.69
119
3.19
81
.88
22DIA.
2.09
53
5.38
137
1.25
32
.95
24
.093
2.36DIA.
2 Mounting Holes.281
7.1 DIA.
Length
FIG:Dims.des
Figure 2: A11 Series Low Temperature Cutout Controls Dimensions, in. (mm)
A11 Series Low Temperature Cutout Controls Product Bulletin
3
Ordering Information
Table 3 describes the A11 Series Low Temperature Cutout Control models.
When ordering an A11 Series Low Temperature Cutout Control:
1. Specify the product number.
2. Specify the low temperature cutout stop setting, if necessary.
Repairs and Replacements
If theA11 Series Low Temperature Cutout Control fails to operate within its specifications, replace the unit. Contact
your nearest Johnson Controls® representative.
Technical Specifications
Table 3: A11 Models
Model Description
A11A Single-Pole, Single-Throw (SPST), Open Low, Manual Reset
A11B SPST, Open Low, Automatic Recycle
A11D Single-Pole, Double Throw (SPDT), Manual Reset
A11E SPDT, Automatic Recycle
A11 Low Temperature Cutout Controls
Product Codes A11A: SPST, Open Low, Manual Reset
A11B: SPST, Open Low, Automatic Recycle
A11D: SPDT, Manual Reset
A11E: SPDT, Automatic Recycle
Range Cutout 35 to 45°F (2 to 7°C)
Differential A11A and A11D: Temperature must be 12°F (6.7°C) above cutout point before control can
be reset.
A11B and A11E: 12°F (6.7°C)
Ambient Temperature Minimum: 0°F (-18°C)
Maximum: 140°F (60°C)
Maximum Temperature at
Bulb 250°F (121°C)
Sensing Element 1/8 in. x 20 ft (3.2 mm x 6.1 m) or 1/8 in. x 40 ft (3.2 mm x 12.2 m)
Capillary Length 4 ft (1.2 m)
Switch Snap-acting contacts in dust-protected enclosure
Material Case: 0.6 (1.6 mm) Cold Rolled Steel
Cover: 0.3 in. (0.8 mm) Cold Rolled Steel
Finish Galvanized Steel
Conduit Opening 22 mm (0.9 in.) hole for 12.7 mm (1/2 in.) conduit
Mounting Bracket Standard on all controls
Shipping Weight Individual Pack: 1.8 lb (0.8 kg)
Overpack of 20 Units: 38 lb (17 kg)
Electrical Rating Pilot Duty: 125 VA, 24 to 277 VAC
Motor Ratings AC Full Load Ampere: 120 V = 16.0 A, 208 V = 9.2 A, 240 V = 8.0 A
AC Locked Rotor Ampere: 120 V = 96.0 A, 208 V = 55.2 A, 240 V = 48.0 A
Non-Inductive Ampere: 120 V = 16.0 A, 208 V = 9.2 A, 240 V = 8.0 A
Published in U.S.A. www.johnsoncontrols.com
A11 Series Low Temperature Cutout Controls Product Bulletin
4
® Johnson Controls and PENN are registered trademarks of Johnson Controls in the
United States of America and/or other countries. All other trademarks used herein are the property
of their respective owners. © Copyright 2018 by Johnson Controls. All rights reserved.
Building Technologies & Solutions
507 E. Michigan Street, Milwaukee, WI 53202
Compliance United States UL Listed, File SA516, SDFY
FCC Compliant to CFR 47, Part 15 Subpart B, Class A
Canada UL Listed, CSA Class No. 1222 01, File LR948
Industry Canada, ICES-003
The performance specifications are nominal and conform to acceptable industry standards. For application 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.
A11 Low Temperature Cutout Controls
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