Product Overview
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Published in U.S.A. www.johnsoncontrols.com
A421 Series Standard Electronic Temperature Controls with and without Power Cords Product Bulletin
9
Building Efficiency
507 E. Michigan Street, Milwaukee, WI 53202
Johnson Controls® and PENN® are registered trademarks of Johnson Controls, Inc. in the
United States of America and/or other countries. All other trademarks used herein are the property
of their respective owners. © Copyright 2015 by Johnson Controls, Inc. All rights reserved.
Table 6: A421 Series Electronic Temperature Controls
Power Consumption 1.8 VA Maximum
Supply Power 24 VAC, 50/60 Hz, Class 2:
108/110/115/120 or 208/230/240 VAC, 50/60 Hz
Ambient Conditions Type 1/IP20:
Operating: -40 to 150°F (-40 to 66°C), 0 to 95% RH Non-condensing
Shipping and Storage: -40 to 185°F (-40 to 85°C), 0 to 95% RH Non-condensing
Type 4X/IP66:
Operating: -40 to 140°F or (-40 to 60°C)
Shipping and Storage: -40 to 140°F (-40 to 60°C)
Temperature Control
Range
-40 to 212°F or (-40 to 100°C)
Sensor Type A99 PTC temperature sensor, 1,035 ohm at 77F (25C)
Sensor Offset Range ±5ºF or ±3ºC
Enclosure Material Type 1: IP20 High-Impact Thermoplastic or
Type 4X: IP66 Watertight, Corrosion-Resistant, High-Impact Thermoplastic
Note: The cover screws on the enclosures must be torqued to 10 to 12 in·lb (1.1 to 1.4
N·m) to achieve Type 1 or Type 4X rating.
Compliance North America: cULus Listed; UL 60730, File E27734; FCC Compliant to
CFR47, Part 15, Subpart B, Class B
Industry Canada (IC) Compliant to Canadian ICES-003, Class B limits
Europe: CE Mark – Johnson Controls, Inc. declares that this product is in compliance with the
essential requirements and other relevant provisions of the EMC Directive; Low Voltage
Directive.
Australia: RCM Compliant
The performance specifications are nominal and conform to acceptable industry standards. Johnson Controls, Inc. shall not be liable for
damages resulting from misapplication or misuse of its products.
United States Emissions Compliance
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses
and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to
radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try
to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
Canadian Emissions Compliance
This Class (B) digital apparatus meets all the requirements of the Canadian Interference-Causing Equipment Regulations.
Cet appareil numérique de la Classe (B) respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.