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Johnson Controls A70HA-1 Manual Reset Temperature Control Open-Low 15°F-55°F 20' Capillary Tube

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Special Price $246.84 Regular Price $274.00
In stock
SKU
A70HA-1
The Johnson Controls A70HA-1 4-Wire Temperature Control is used in HVAC systems such as coil freeze detection and ventilation system shutdown. It works within the temperature range of 15-55°F and has a vapor-charged sensing element with a 20-foot capillary. This part uses snap-acting contacts to break the main circuit and make the auxiliary circuit at the same time when the temperature decreases. It has the advantages of high reliability, easy adjustment with a screwdriver slot, and durability for typical working conditions.
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HVAC Controls & Electrical, Control & Sensing Devices
Manufacturer:
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Specifications

  • Type: Temperature Control
  • Temperature Range: 15-55°F
  • Capillary Length: 20'
Manufacturer Name: Johnson Controls
Product Number: A70HA-1
OEM Part Number: A70HA-1
Product Description: 15/55F M/R Open-Lo 20'Cap Ctrl
Weight:2.44lbs/1106.76g

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Product Questions (2)
Customer Questions
What maintenance is required for the Johnson Controls A70HA-1 Temperature Control?

Regularly inspect the device and capillary tube for kinks, leaks, or corrosion. Test its operation to ensure accurate opening and closing at set temperatures. Clean contacts carefully and follow safety precautions when working with electrical connections.

What are common issues with the Johnson Controls A70HA-1 Temperature Control?

  • Failure to trip at designated temperature.
  • Capillary tube damage or leaks.
  • Sticking or slow mechanical response.
  • Loose wiring or poor electrical connections.
  • Inconsistent temperature regulation.

Installation Steps

Step 1: Turn off power to the system to prevent electrical hazards.

Step 2: Remove the old temperature control and disconnect wiring.

Step 3: Mount the new control in a suitable location and secure it.

Step 4: Position the capillary tube carefully in the sensing area without kinks.

Step 5: Connect wiring according to the system diagram for operation.

Step 6: Restore power and test to ensure the control opens correctly at the set temperature.