Description
The Danfoss 120Z0039 is a 400-volt, 65-watt crankcase heater engineered to protect refrigeration and air conditioning compressors from the damaging effects of refrigerant migration and liquid slugging during off-cycle periods. By maintaining the compressor crankcase at an elevated temperature, this heater prevents refrigerant from condensing and mixing with the compressor oil — a leading cause of premature compressor failure.
Danfoss is a globally recognized leader in HVAC and refrigeration components, and the 120Z0039 reflects their commitment to precision engineering and long-term system reliability. This crankcase heater is an essential protective accessory for commercial and industrial refrigeration systems operating on 400-volt electrical supplies.
Key Features
- Operating Voltage: 400V
- Power Output: 65 Watts
- Prevents refrigerant migration into compressor oil during off-cycle periods
- Protects against liquid slugging and compressor damage
- Designed for commercial and industrial refrigeration applications
- Manufactured by Danfoss — a trusted global HVAC/R component brand
Application
The 120Z0039 crankcase heater is ideal for use with compressors in commercial refrigeration systems, heat pumps, and air conditioning equipment where 400V power is available. Installing a crankcase heater is a best-practice measure recommended by compressor manufacturers to extend equipment life and reduce service calls.
Why Use a Crankcase Heater?
- Reduces risk of compressor failure due to refrigerant dilution of lubricating oil
- Minimizes liquid slugging on startup
- Extends compressor service life
- Lowers total cost of ownership through preventive protection
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