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The A421 Series control is a single stage, electronic temperature control thermostat with a single-pole, double-throw (SPDT) output relay and a NEMA 4X IP66 housing.
Features:
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:
A421 Series Thermostat Installation & Operation Manual