The A421 Series controls are single stage, line-voltage electronic temperature controls with a single-pole, double-throw (SPDT) output relay. These can be used to control a wide variety of single-stage refrigeration or HVAC equipment with an ambient temperature range of -40 to 212°F. Model A421ABC-03C features standard Type 1 (NEMA) IP20 high-impact plastic enclosure suitable for surface or DIN rail mounting and rated for either 120 or 240 VAC. Includes A99BB-300C PTC temperature sensor with a 2 in. standard probe and 9.75 ft. PVC cable.
Features:
- Control Front Panel LCD
- Basic and Advanced Programming Menu
- On/Off Temperature Adjustment
- Switch-Activated Temperature Setback
- Adjustable Anti-Short Cycle Delay
- Adjustable Sensor Offset
- Optional Restricted Adjustment Mode
- Sensor Failure Mode










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