HVAC Products



AC-2020 Series 3-Phase Compressor Protector

AC-2020 Series 3-Phase Compressor Protector

The AC 2020 compressor protector provides multi-mode time delays, reset selections and a memory capability which indicates using LED’s, the last fault condition. This offers not only protection for the compressor in adverse electrical conditions, but also a method to […]

AC-410 Phase Sequence Loss Monitor

AC-410 Phase Sequence Loss Monitor

About the AC-410 Phase Sequence Loss Monitor from the ATC Diversified Electronics division of Marsh Bellofram: This internal control relay drops out and a 3 minute delay-on-break time delay begins. This delay is used to lock out the compressor, allowing […]

AC-503 Series Delay-On-Break Timer

AC-503 Series Delay-On-Break Timer

The AC-503 Series Delay-On-Break Timer from the ATC Diversified Electronics division of Marsh Bellofram is a family of HVAC controls provides short cycle protection by locking out the compressor for a period of time after a voltage or thermostat interruption. […]

AC-505-5 Series Delay-On-Break Timer

AC-505-5 Series Delay-On-Break Timer

The AC-505-5 Series Delay-On-Break Timer from the ATC Diversified Electronics division of Marsh Bellofram provides short cycle protection by locking out the compressor for a period of time after a voltage or thermostat interruption.

ASC-500 Series Delay-On-Break Timer

ASC-500 Series Delay-On-Break Timer

The ASC-500 Series Delay-On-Break Timer from the ATC Diversified Electronics division of Marsh Bellofram Corporation provides short cycle protection by locking out the compressor for a period of time after a voltage or thermostat interruption.

AC-800 Series Star Performer Timer

AC-800 Series Star Performer Timer

The ATC Diversified AC-800 Series Star Performer Timer is a Delay On Make Timer, providing short cycle protection of compressors by delaying restart after a voltage or control circuit interruption.

CV Series Single Phase Under Over Voltage Monitor

CV Series Single Phase Under Over Voltage Monitor

The CV Series Single Phase Under Over Voltage Monitor from the ATC Diversified Electronics division of Marsh Bellofram combines the voltage monitor with short cycle protectors for appliance control. These units employ a user selectable voltage range Set Point switch.  […]

AC 2020 Series 3-Phase Compressor Protector

AC 2020 Series 3-Phase Compressor Protector

The AC 2020 3-Phase Compressor Protector from the ATC Diversified Electronics division of Marsh Bellofram Corporation provides multimode time delays, reset selections and a memory capability which indicates using LED’s, the last fault condition. This offers not only protection for […]

AC-503 Series Delay-On Break Timers

AC-503 Series Delay-On Break Timers

AC-503 Series Delay-on-Break Timers from the ATC Diversified Electronics division of Marsh Bellofram are a family of HVAC controls. They provide short cycle protection by locking out the compressor for a period of time after a voltage or thermostat interruption. […]