Brand: Intermatic | Manufacturer Part Number: CD1-024R | Big Frog Supply SKU: CD1-024R
Product Overview
The Intermatic CD1-024R Compressor Defender is a Type 2 protective device for compatible central air-conditioning and heat-pump condensing equipment. It combines three-mode surge protection with undervoltage monitoring and a three-minute short-cycle delay. This coordinated approach helps protect motors, controls, and electronic components from several common power disturbances rather than addressing surge voltage alone.
Auto-sensing input accepts 120/208–240 VAC systems, while an isolated normally closed 24 VAC/VDC, 2-amp control output interfaces with a compatible thermostat or contactor circuit. When voltage falls outside the approved range, the unit can interrupt the control circuit and respond within five line cycles. After power conditions recover, the built-in delay helps prevent the compressor from restarting immediately. Separate green and red LED indicators provide visible operating, short-cycle, surge, and undervoltage status for troubleshooting.
Key Features
- Type 2 surge protective device
- 120/208–240 VAC universal auto-sensing input
- Three protection modes: L1-N, L2-N, and L1-L2
- Undervoltage monitoring
- Three-minute short-cycle delay
- 24 VAC/VDC, 2 A isolated normally closed control output
- TPMOV surge protection technology
- Green and red status indicators
- Outdoor Type 3 enclosure
Common Uses
- Central air-conditioning condensers
- Heat-pump condensing units
- Compatible compressor and motor-control circuits
- HVAC equipment exposed to surges, brownouts, or rapid power cycling
Technical Specifications
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Input voltage: 120/208–240 VAC
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Surge protection type: Type 2
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Protection modes: L1-N, L2-N, L1-L2
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Control output: 24 VAC/VDC, 2 A, isolated normally closed contact
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Short-cycle delay: 3 minutes
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Undervoltage response: Five line cycles
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Nominal discharge current: 20 kA
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Short-circuit current rating: 100 kA
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Enclosure: Outdoor Type 3
Dimensions
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Height: 6-13/32 inches
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Width: 1-19/32 inches
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Depth: 4 inches
Installation Notes
Installation involves line voltage and an HVAC control circuit and should be completed by a qualified HVAC or electrical professional. Confirm the equipment voltage, thermostat/control wiring, contactor operation, grounding, and installation location before connecting the device. The CD1-024R does not replace required overcurrent protection or equipment safety controls.
Frequently Asked Questions
Does the CD1-024R provide surge protection only?
No. It also monitors undervoltage and provides a three-minute compressor short-cycle delay.
What control voltage does it support?
The isolated normally closed control output is rated for 24 VAC or VDC at 2 amps.
Can it be used with either 208- or 240-volt equipment?
Its auto-sensing input supports compatible 120/208–240 VAC systems, but the complete equipment and wiring must be verified.
Why Buy This Product from Big Frog Supply?
The CD1-024R combines several HVAC power-protection functions in one exact model. Big Frog Supply clearly identifies its input range, control output, delay, enclosure, and protection modes so installers can distinguish it from a basic surge-only device.
Modes of Protection 3 (L1-N, L2-N, L1-L2)
Surge Protection Type 2
Enclosure Type Outdoor type 3
Surge Protection Technology TPMOV®
Warranty Period 3-Year limited
CAProp65Message Please see the Warning @ www.P65Warnings.ca.gov
Connected Equipment Warranty Period 3-Year
Control Output Current Rating 2 A @ 24 VAC, isolated NC contact
Country Of Origin Mexico
Maximum Continuous Operating Voltage (L-L) 300
Maximum Continuous Operating Voltage (L-N/G) 150
Nominal Discharge Current 20 kA
Power Disruption Response Time 3 line cycles*
Short Circuit Current Rating 100 kA
Short Cycle Delay 3 min
Short Cycle LED Indicator Green
Surge Protection Compliance ANSI/UL1449 4th Edition
Surge Protection LED Indicator Green
Undervoltage LED Indicator Red
Undervoltage Protection Compliance AHRI
Voltage Protection Rating (L-L) 1200
Voltage Protection Rating (L-N/G) 700
Wire Size Max #10 AWG, Tinned Copper
Operating Temperature Max (°C) 70
Operating Temperature Max (°F) 158
Operating Temperature Min (°C) -40
Operating Temperature Min (°F) -40
