A421GEF-01C | Single Stage Temp Controller with Sensor, 24VAC, NEMA4X, 9" lead, -40 to 212F, HTG/CLG | JOHNSON

Electronic Single Stage Temperature Control for Industrial Environments: (SKU: A421GEF-01C) by Johnson Controls The Johnson Controls A421GEF-01C is an electronic single-stage temperature control designed for industrial applications. It features a temperature range of -40°F to 212°F (-40°C to 100°C) and a temperature sensor with a length of 0.25m (9") for precise temperature measurement. This unit operates on a 24 Vac power supply and is IP66 rated for protection against dust and water ingress. It is suitable for use in harsh industrial environments and is commonly used in heating, ventilation, and air conditioning (HVAC) systems. The Johnson Controls A421GEF-01C temperature control offers precise temperature control and reliable performance in demanding industrial environments. Shop our HVAC supply store now to secure the best prices and fast shipping for your industrial products!

Description

The A421 Series controls are single stage, electronic temperature controls with a single-pole, double-throw (SPDT) output relay. The controls feature an adjustable backlit LCD for viewing the temperature and status of other functions, and a three-button touchpad for setup and adjustment. An LED indicates the On/Off status of the output relay.

The A421 controls are available in low voltage 24 VAC and high voltage 120 or 240 VAC models, which provide options for most refrigeration and HVAC applications.

The A421 controls provide heating or cooling control, sensor offset, temperature setback, adjustable anti-short cycle delay, and a restricted user adjustment mode. The temperature units can be displayed in °F or °C.

The temperature adjustment range is -40 to 212°F or -40 to 100°C. The A421 controls are available in Type 1, IP20 high-impact plastic enclosures suitable for surface or DIN rail mounting and Type 4X, IP66 watertight, corrosion-resistant surface mount enclosures.

Refer to the A421 Series Electronic Temperature Controls Product Bulletin (LIT-12011972) for important product application information.

Applications

The A421 Electronic Temperature Control can be used to control a wide variety of single-stage refrigeration or HVAC equipment.

Sample temperature control applications include:

• temperature monitoring and alarming
• on/off control of boilers and chillers
• boiler and chiller pump control
• heating and cooling control
• cooling tower fan control based on water temperature
• supply, makeup, and mixed air temperature control
• temperature actuated valve control
• supply and makeup air damper and fan control
• condenser fan control based on condenser temperature.