Intermatic CD1-024R Compressor Defender 120-240V Protector

Product Description

The INTERMATIC CD1-024R Compressor Defender is an all-in-one protective device designed to shield HVAC compressors and circuit boards from power disturbances including surges, brownouts, and short cycles. It operates on auto-sense voltage technology, accepting 120, 208, and 240 VAC single-phase 60 Hz input without manual adjustment. The unit includes a normally closed relay output rated at 24 VAC and 2 amps for low-voltage control circuit integration. Built-in LED indicators give technicians real-time status feedback for fast field diagnostics. The device is UL listed and compliant with ANSI/UL 1449 3rd edition and AHRI Standard 110-1012 Range B2 for voltage drop protection.

The CD1-024R is suited for residential and light commercial applications where compressor protection is required. It can be installed inside a condensing unit or mounted on an outdoor compressor. Typical applications include central air conditioner and heat pump systems where power quality issues such as brownouts, voltage surges, or rapid short cycling pose a risk to compressor longevity and control board reliability. Licensed HVAC technicians install this device as part of routine system protection or as a retrofit on existing equipment.

Key Features

• Auto-sense voltage technology accepts 120, 208, and 240 VAC without manual configuration
• Type 2 SPD surge protection with a voltage protection rating of 700 V line-to-neutral/ground and 1200 V line-to-line
• Nominal discharge rating of 10 kA
• Normally closed relay output: 2 amps at 24 VAC isolated contact for low-voltage control integration
• LED indicators for real-time system status and simplified field troubleshooting
• Compliant with ANSI/UL 1449 3rd edition and AHRI Standard 110-1012 Range B2

Compatibility

Designed as an OEM-style retrofit protector for residential and light commercial central air conditioner and heat pump condensing units operating on single-phase 120, 208, or 240 VAC 60 Hz power.

Installation Notes

Installation should be performed by a licensed HVAC technician. Disconnect and lock out all power to the condensing unit before installing or wiring this device. The unit can be mounted inside the condensing unit enclosure or on the exterior of an outdoor compressor. Follow all applicable NEC requirements for low-voltage control wiring and line-voltage connections.