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JOHNSON CONTROLS Temperature Control: Single Stages - Single-Stage Electronic Temperature Controls
JOHNSON CONTROLSSingle-Stage Electronic Temperature Controls

JOHNSON CONTROLS Temperature Control: Single Stages

The JOHNSON CONTROLS A421GEF-02C is a single-stage electronic temperature control designed for chiller control applications. It operates with a 24V AC input voltage and is compatible with the A99 series. This digital…

SKU 3G-OTH-68831

Brand
JOHNSON CONTROLS
Item
Temperature Control: Single Stages
Category
Single-Stage Electronic Temperature Controls
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Technical Specifications

JOHNSON CONTROLS
Brand
JOHNSON CONTROLS
Application
Chiller Control
Product Type
Temperature Control
Input Voltage
24V AC
Compatible with Series
A99
Variable Output Voltage
No
Manufacturer Part Number
A421GEF-02C
View Full Spec Sheet

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

Product Description

The JOHNSON CONTROLS A421GEF-02C is a single-stage electronic temperature control designed for chiller control applications. It operates with a 24V AC input voltage and is compatible with the A99 series. This digital control features SPDT switching and covers a temperature range of -40°F to 212°F, with a NEMA 4X enclosure.

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

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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Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital, 1, SPDT, 120V AC/240V AC (MPN A421ABC-02C). Key specifications — Variable Output Voltage: No; Manufacturer Part Number: A421ABC-02C; Product Type: Temperature Control; Application: Boiler Control; Brand: JOHNSON CONTROLS; Input Voltage: 120V AC; Compatible with Series: A99.
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Temperature Control: Single Stages, Heat or Cool, -40°F to 212°F, Digital, 1, SPDT, 24V AC (MPN A421GBF-02). Key specifications — Variable Output Voltage: No; Manufacturer Part Number: A421GBF-02; Product Type: Temperature Control; Application: Boiler Control; Brand: JOHNSON CONTROLS; Input Voltage: 24V AC.
Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital, 4X, SPDT, A99 (MPN A421AEC-02C). Key specifications — Variable Output Voltage: No; Manufacturer Part Number: A421AEC-02C; Product Type: Temperature Control; Application: Cooling Control; Brand: JOHNSON CONTROLS; Input Voltage: 120V AC; Compatible with Series: A99.
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Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital, 4X, SPDT, A99 (MPN A421AEC-02C). Key specifications — Variable Output Voltage: No; Manufacturer Part Number: A421AEC-02C; Product Type: Temperature Control; Application: Cooling Control; Brand: JOHNSON CONTROLS; Input Voltage: 120V AC; Compatible with Series: A99.
Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital, 1, SPDT, 120V AC/240V AC (MPN A421ABC-04C). Key specifications — Variable Output Voltage: No; Manufacturer Part Number: A421ABC-04C; Product Type: Temperature Control; Application: Damper Control; Brand: JOHNSON CONTROLS; Input Voltage: 120V AC; Compatible with Series: A99.
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Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital, 1, SPDT, 120V AC/240V AC (MPN A421ABC-04C). Key specifications — Variable Output Voltage: No; Manufacturer Part Number: A421ABC-04C; Product Type: Temperature Control; Application: Damper Control; Brand: JOHNSON CONTROLS; Input Voltage: 120V AC; Compatible with Series: A99.
Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital, 1, SPDT, 120V AC/240V AC (MPN A421ABG-02C). Key specifications — Variable Output Voltage: No; Manufacturer Part Number: A421ABG-02C; Product Type: Temperature Control; Application: Heating Control; Brand: JOHNSON CONTROLS; Input Voltage: 240V AC; Compatible with Series: A99.
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Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital, 1, SPDT, 120V AC/240V AC (MPN A421ABG-02C). Key specifications — Variable Output Voltage: No; Manufacturer Part Number: A421ABG-02C; Product Type: Temperature Control; Application: Heating Control; Brand: JOHNSON CONTROLS; Input Voltage: 240V AC; Compatible with Series: A99.
Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital, 4X, SPDT, 24V AC, A99 (MPN A421GEF-01C). Key specifications — Variable Output Voltage: No; Manufacturer Part Number: A421GEF-01C; Product Type: Temperature Control; Application: Heating Control; Brand: JOHNSON CONTROLS; Input Voltage: 24V AC; Compatible with Series: A99.
JOHNSON CONTROLS
Temperature Control: Single Stages, Heat and Cool, -40°F to 212°F, Digital, 4X, SPDT, 24V AC, A99 (MPN A421GEF-01C). Key specifications — Variable Output Voltage: No; Manufacturer Part Number: A421GEF-01C; Product Type: Temperature Control; Application: Heating Control; Brand: JOHNSON CONTROLS; Input Voltage: 24V AC; Compatible with Series: A99.