Aci A/FS-1A Low Limit Thermostat

Product Description

The ACI A/FS-1A is a low limit controller, also known as a Freeze Stat, designed for HVAC equipment needing low-temperature cutout protection to prevent cooling coils from freezing. It should be mounted between heating and cooling coils on the supply side of the fan unit and responds to the lowest temperature sensed along any 1 foot section.

• Available with 6, 10, and 20 foot length capillaries
• Adjustable set-point
• Manual reset and automatic reset versions

Product Highlights

The ACI A/FS-1A is designed for freeze protection with SPDT and low limit freeze stats.

Product Information

Standard Information

• Brand: ACI
• Manufacturer Part Number: A/FS-1A

Technical Specifications

• Stages: Single
• System Switching: No
• Fan Switching: No
• Type: Low Limit
• Differential: 1.8F
• Display: Mechanical
• Controls Outputs: 1 Set SPDT Contacts
• Supply Voltage (Nominal): 120 VAC,240 VAC
• Sensing Element: Vapor-filled, copper capillary tube
• Output: A/FS-1, -3, -5: one SPDT Form 1C Relay
• Contact Rating: 250 VAC, 15 (8) A
• Setpoint Range: 14 to 54 F (-10 to 12 C) field adjustable
• Setpoint Differential: 1.8 F (1.0 C), fixed for auto reset
• Setpoint Safety Lock: 35.6 F (2.0 C) factory set; field adjustable
• Housing Rating: NEMA 1 IP40
• Operating Temperature: 14 to 194 F (-10 to 65 C)
• Operating Humidity: 0 to 95%, non-condensing