Ranco
Ranco A30-261 Defrost Cycle Control SPST NC hvac control
Controls defrost cycles with a 6 °F differential, opening at 38 °F and closing at 32 °F, rated 20 A at 120/240 V AC
- Precise defrost timing with 6 °F constant differential
- Reliable switching up to 20 A at 120 V or 240 V AC
- Handles compressor start-up surges of 80 A locked-rotor current
- 84 in capillary with bulb for flexible sensor placement
- Factory-set 32 °F off / 38 °F on temperatures for walk-in freezers
Defrost cycle control for HVAC systems
The Ranco A30-261 is a single-pole single-throw normally-closed defrost cycle control designed for refrigeration and HVAC applications. It manages defrost cycles by opening the circuit at a cold off temperature of 32 degrees F and closing again at a cold on temperature of 38 degrees F.
Capillary length and temperature differential
An 84 inch capillary with bulb provides flexible sensor placement within the equipment. The control uses a constant differential of 6 degrees F between on and off points, offering predictable cycling for standard defrost requirements.
Electrical ratings for normal operation
The control carries a full load current of 20 A at both 120V AC and 240V AC, with a locked rotor current of 80 A at both voltages. These ratings support direct control of compressor and heater circuits in typical HVAC installations.
Highlights
- Precise defrost timing with 6 °F constant differential
- Reliable switching up to 20 A at 120 V or 240 V AC
- Handles compressor start-up surges of 80 A locked-rotor current
- 84 in capillary with bulb for flexible sensor placement
- Factory-set 32 °F off / 38 °F on temperatures for walk-in freezers
Specifications
| Brand | RANCO |
|---|
Questions about this item
Will the 84 in capillary reach the evaporator coil on my existing walk-in cooler?
The control includes an 84 in capillary with bulb, so measure the routing distance from the control mounting location to the coil to confirm fit.
How can I verify the SPST NC contacts are opening and closing at the 32 °F off and 38 °F on points?
Place a calibrated thermometer at the bulb, watch the temperature fall to 32 °F and rise to 38 °F, and use a multimeter to confirm the contacts open on cooldown and close on warm-up.
Does the box include mounting hardware or a wiring harness, or must I supply them?
The supplied unit is the control with its 84 in capillary and bulb; mounting screws, brackets and any wiring connectors are not included and must be sourced separately.
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