Johnson Controls A70HA-14C Line Voltage Mechanical Thermostat 15-55°F 20ft Capillary

The Johnson Controls A70HA-14C is a heavy-duty temperature-limit control that incorporates a vapor charged sensing element designed for precise temperature control in HVAC applications. This remote bulb thermostat features a gas-filled bulb and electroplated copper capillary tube, designed for large coils where air stratification could cause localized freezing.

Key Features:

• Four-wire, two-circuit contact block with two isolated sets of contacts that transfer at set point so when the main contact opens, the auxiliary contact closes simultaneously
• Temperature control range: 15°F to 55°F with stop at 35°F
• 20-foot capillary length with 1/8 inch bulb diameter for remote sensing capability
• Manual reset differential type with 2°F temperature differential
• Voltage rating: 24 to 240V AC with 15A at 120VAC and 8A at 240VAC full load capacity
• DPST switch type with open/close on rise action
• NEMA 1 rated steel enclosure

Typical applications include shutdown of a ventilation system and BAS alarm indication upon low or high temperature. The dual-contact design makes this thermostat ideal for freeze protection systems, refrigeration controls, and commercial HVAC applications requiring both control and alarm functions. Compact dimensions of 8-1/4 inches height, 6-1/4 inches width, and 2-1/2 inches depth allow for easy installation in standard electrical boxes.