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JOHNSON CONTROLSSingle-Stage Electronic Temperature Controls

JOHNSON CONTROLS A421ABG-02 Single-Stage Electronic Temperature Control

The JOHNSON CONTROLS A421ABG-02 is a single-stage electronic temperature control designed for chiller control applications. It operates with an input voltage of 240V AC and features a digital display with a…

SKU 3G-OTH-68631

Also listed as: A421ABG02 · A421ABG 02

Brand
JOHNSON CONTROLS
Item
A421ABG-02 Single-Stage Electronic Temperature Control
Part Number
A421ABG-02
Category
Single-Stage Electronic Temperature Controls
Available to Order
Also known as:A421ABG-02JOHNSON CONTROLS
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Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
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Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

JOHNSON CONTROLS
Manufacturer Part Number
A421ABG-02
Type
Heat or Cool, -40°F to 212°F, Digital, 1, SPDT
AC/240V AC
120V
Application
Chiller Control
Product Type
Temperature Control
Input Voltage
240V AC
Variable Output Voltage
No

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JOHNSON CONTROLS Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The JOHNSON CONTROLS A421ABG-02 is a single-stage electronic temperature control designed for chiller control applications. It operates with an input voltage of 240V AC and features a digital display with a temperature range of -40°F to 212°F, utilizing a single-pole double-throw (SPDT) switch for heat or cool operation. This model does not provide variable output voltage.

Frequently Asked Questions

What is the JOHNSON CONTROLS A421ABG-02 temperature control used for?

The JOHNSON CONTROLS A421ABG-02 is a single-stage electronic temperature control used for chiller control applications. It manages heating or cooling by switching a single-pole double-throw (SPDT) relay based on the setpoint, with a digital display showing temperatures from -40°F to 212°F.

What are the specifications of the JOHNSON CONTROLS A421ABG-02?

The JOHNSON CONTROLS A421ABG-02 operates at 240V AC input voltage, has a temperature range of -40°F to 212°F, and uses a SPDT switch for heat or cool control. It is a digital, single-stage temperature control with no variable output voltage, designed for chiller control applications.

Where to buy the JOHNSON CONTROLS A421ABG-02 worldwide?

You can source the JOHNSON CONTROLS A421ABG-02 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations, ensuring the temperature control reaches your facility reliably.

How to install the JOHNSON CONTROLS A421ABG-02 temperature control?

Install the JOHNSON CONTROLS A421ABG-02 by mounting it in a dry location, wiring the 240V AC supply to the input terminals, and connecting the SPDT output to your chiller's contactor. Set the desired temperature using the digital interface. Always follow local electrical codes and the manufacturer's manual.

Used in

Common applications for JOHNSON CONTROLS
Industrial refrigeration — Johnson Controls P170SA-1C dual pressure control for compressor protection in ammonia or halocarbon systems
Chiller plant automation — Johnson Controls VA7810-HGA-2 electric globe valve actuator for modulating chilled water flow in VG7000 series valves
Pneumatic HVAC retrofit — Johnson Controls T-4002-302 conversion kit for upgrading existing Robertshaw thermostats in commercial buildings
Cooling tower water management — Johnson Controls V-4332-1007 pneumatically actuated diaphragm valve for 3-way diverting of water flow
Boiler fuel oil pressure monitoring — Johnson Controls P545NCB-25C electronic lube oil pressure control with alarm for burner management systems
Process pressure sensing — Johnson Controls P599AAPS105C pressure transmitter with IP67 rating for washdown zones in food and beverage plants
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JOHNSON CONTROLS Products

3G Electric supplies JOHNSON CONTROLS single-stage electronic temperature controls. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Single-stage electronic temperature control with digital display for temperature sensing and control in HVAC and refrigeration systems. Features SPDT switching, supports heat or cool modes, and operates with 240V AC input (also rated 120V AC). Temperature range from -40°F to 212°F
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Digital single-stage temperature control for cooling applications. Features SPDT switching, operates on 240V AC input, and covers a temperature range of -40°F to 212°F. Suitable for use in commercial refrigeration, walk-in coolers, and HVAC systems

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