1. Crankcase Heater for AC Compressors (HVAC Maintenance)
The Hongtai Crankcase Heater is a critical component for the longevity of Air Conditioning and Heat Pump systems. In cold weather, refrigerant migrates to the compressor crankcase and mixes with the oil. On startup, this causes “liquid slugging” and oil dilution, which destroys compressors.
Our Compressor heater belt solves this by keeping the crankcase warm when the system is off. Designed for the HVAC MRO market, this Heat pump sump heater features a universal spring-buckle design, allowing one heater to fit a range of compressor diameters, reducing inventory for service technicians.
2. Key Technical Features
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Universal Spring Fit: The heater belt comes with an extension spring kit, allowing it to stretch and lock securely around compressors of varying circumferences.
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IP67 Waterproof: Fully vulcanized silicone rubber construction makes it impervious to condensation, rain, and ice in outdoor condenser units.
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Effective Protection: Prevents refrigerant absorption into the oil, ensuring proper lubrication on startup.
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Self-Regulating Option: Available with PTC or self-regulating cables that adjust power output based on ambient temperature (optional).
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Easy Retrofit: Can be installed on existing units in minutes without disconnecting refrigerant lines.
3. Technical Specifications
| Parameter | Standard Specification |
| Belt Width | 14mm (Standard) |
| Length | Adjustable (e.g., Fits 400mm – 1200mm girth) |
| Power | 30W, 40W, 50W, 70W, 90W |
| Voltage | 240V (Common for HVAC), 480V |
| Attachment | Stainless Steel Springs & Eyelets |
| Insulation | High-Grade Silicone Rubber |
| Lead Wire | 1 Meter Cold Lead |
4. Applications
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Residential HVAC: Heat pumps and central AC units in winter.
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Commercial Refrigeration: Chillers, Walk-in freezers, and VRF systems.
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MRO Market: A “must-have” truck stock item for HVAC repair technicians.
5. Why is this critical for Heat Pumps?
As heat pumps become the standard for heating, they operate in colder environments than traditional ACs. The risk of refrigerant migration is highest when the unit is in standby mode during winter. A functional Crankcase heater ensures the compressor is warm and ready to run, preventing catastrophic mechanical failure during the morning startup cycle.
6. FAQ
Q: How do I size the heater?
A: Measure the circumference (girth) of the compressor shell near the bottom (the oil sump). Choose a heater length that covers 70-90% of the circumference. The springs will bridge the gap.
Q: When should the heater be on?
A: Ideally, the crankcase heater should be energized whenever the compressor is OFF. Many modern systems control this automatically via the contactor auxiliary switch.
Q: Is it compatible with Scroll Compressors?
A: Yes, it fits all hermetic reciprocating and scroll compressors commonly used in Copeland, Danfoss, and Bristol units.
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