HVAC Products

AC-2020 Series

AC-2020The AC-2020 compressor protector from the ATC Diversified Electronics division of Marsh Bellofram 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 the compressor in adverse electrical conditions but also a method to readily determine the type of fault occurrence..

AC-410 Phase Sequence & Loss Monitor

AC_410AC-410 Phase Sequence & Loss Monitor from the ATC Diversified Electronics division of Marsh Bellofram protects 3 phase refrigeration equipment from adverse line conditions. When any of the adverse line conditions occur, the 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 time for head pressure to equalize. When the delay has completed, the relay will re-energize provided all conditions are corrected and the external control voltage is present on terminals six (6) and seven (7). A green indicator glows when all line conditions are normal and a red indicator shows when the timer is in its delay.

AC-503 Series

AC-503The AC-503 is from the ATC Diversified Electronics division of Marsh Bellofram. This family of HVAC controls provides short cycle protection by locking out the compressor for a period of time after a voltage or thermostat interruption. Subsequent interruptions will not increase the delay period. Since the delay begins when the interruption occurs, the temperature control is not affected. Under normal operating conditions, the compressor off time is longer than five (5) minutes. In this case, the use of these timers will not lengthen this off cycle.

AC-505-5 Series

AC-505-5The AC-505-5 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. Subsequent interruptions will not increase the delay period. Since the delay begins when the interruption occurs, the temperature control is not affected. Under normal operating conditions, the compressor off time is longer than five (5) minutes. In this case, the use of these timers will not lengthen this off cycle. This is an easy to install, two (2) wire Short Cycle Timer that connects in series with the control voltage and control relay. The AC-505 is engineered to provide true thermostat interruption protection even when there is continuous current flow through the thermostat’s cooling anticipator.

ASC-500 Series

ASC-500The ASC-500 is from the ATC Diversified Electronics division of Marsh Bellofram. This family of controls provides short cycle protection by locking out the compressor for a period of time after a voltage or thermostat interruption. Subsequent interruptions will not increase the delay period. Since the delay begins when the interruption occurs, the temperature control is not affected. Under normal operating conditions, the compressor off time is longer than five (5) minutes. In this case, the use of these timers will not lengthen this off cycle. These are easy to install two (2) terminal Short Cycle Timers that connect in series with the control voltage and control relay. The 24 VAC model employs a built-in bypass circuit for allowing continuous flow through the thermostat’s cooling anticipator while the timer output is off.

ASC-800 Series

Type 110 photoThe ATC Diversified STAR PERFORMER provides short cycle protection of compressors by delaying restart after a voltage or control circuit interruption. When the interruption occurs, the control relay drops out. The delay period begins when power is restored, providing random restart. This universal voltage Delay-on-Make Short Cycle Timer provides the ultimate protection against short cycling of a compressor. The Star Performer offers true thermostat interruption protection even in 24 VAC control circuits.

ASC-600 Series

Type 110 photoThe ASC-600 Series, from the ATC Diversified Electronics division of Marsh Bellofram, provides short cycle protection of compressors by delaying restart after a voltage or control circuit interruption. When the interruption occurs, the control relay drops out. The delay period begins when power is restored, providing random restart. These are easy to install, two (2) terminal short cycle timers that connect in series with the control voltage and control relay. The 24 VAC models employ a built in bypass circuit for allowing continuous current flow through the thermostat’s cooling anticipator while the timer output is off.AC-600 Series Delay-On-Make Timer.