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JOHNSON CONTROLSWeatherproof Two-Stage Controls

JOHNSON CONTROLS Two Stage Temp Control,40/120F,6In Cap: 40° to 120°F, Steel, Fixed

The JOHNSON CONTROLS A28MA-1C is a weatherproof two-stage temperature control with a steel enclosure. It features a fixed differential of 8/5°F, a temperature control range of 40° to 120°F, and operates on 24 to 277V…

SKU 3G-OTH-68901

Also listed as: A28MA1C · A28MA 1C

Brand
JOHNSON CONTROLS
Item
Two Stage Temp Control,40/120F,6In Cap: 40° to 120°F, Steel, Fixed
Category
Weatherproof Two-Stage Controls
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

JOHNSON CONTROLS
Manufacturer Part Number
A28MA-1C
Type
Steel, Fixed, 8/5°F
Voltage
24 to 277V AC
Differential Type
Fixed
Enclosure Material
Steel
Switch Type/Action
SPDT, Open/Close on Rise
Temperature Differential
8/5°F
Temperature Control Range
40° to 120°F
Capillary Length/Bulb Diameter
6 ft Capillary, 4 in x 3/8 in Bulb

Technical Documents

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

Product Description

The JOHNSON CONTROLS A28MA-1C is a weatherproof two-stage temperature control with a steel enclosure. It features a fixed differential of 8/5°F, a temperature control range of 40° to 120°F, and operates on 24 to 277V AC. The SPDT switch action is open/close on rise, and the unit includes a 6 ft capillary with a 4 in x 3/8 in bulb.

Frequently Asked Questions

What is the JOHNSON CONTROLS A28MA-1C two-stage temperature control used for?

The JOHNSON CONTROLS A28MA-1C is a weatherproof two-stage temperature control used in HVAC and industrial applications to regulate heating or cooling equipment. It is suitable for outdoor or damp environments due to its steel enclosure, and it controls temperatures from 40° to 120°F with a fixed 8/5°F differential.

What are the specifications of the JOHNSON CONTROLS A28MA-1C?

The JOHNSON CONTROLS A28MA-1C has a temperature control range of 40° to 120°F, a fixed differential of 8/5°F, and operates on 24 to 277V AC. It features SPDT switch action (open/close on rise), a 6 ft capillary with a 4 in x 3/8 in bulb, and a steel enclosure for weatherproof protection.

Where to buy the JOHNSON CONTROLS A28MA-1C worldwide?

You can source the JOHNSON CONTROLS A28MA-1C through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine JOHNSON CONTROLS parts to procurement teams and engineers globally.

How to install the JOHNSON CONTROLS A28MA-1C temperature control?

Mount the JOHNSON CONTROLS A28MA-1C in a dry, accessible location using the steel enclosure's mounting holes. Connect the SPDT switch per the wiring diagram for 24 to 277V AC, ensuring the capillary bulb is fully immersed in the sensed medium. Secure the 6 ft capillary without kinks, and verify the setpoint and differential before energizing.

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 weatherproof two-stage controls. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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