Danfoss 120Z0670 Surface Sump Heater 48W 460V

The Danfoss 120Z0670 is a surface-mounted sump heater designed for refrigeration and HVAC compressors, delivering 48 watts of heating power at 460 volts. This crankcase heater is engineered to prevent refrigerant migration and maintain optimal compressor oil conditions during off-cycles and low-temperature environments.

Key Features:

• 48-watt electrical heating element provides consistent warmth to the compressor sump
• 460-volt operation for commercial and industrial HVAC/R applications
• Surface-mount design installs externally around the compressor base for easy installation and replacement
• Prevents refrigerant migration into compressor oil during shutdown periods
• Maintains proper oil viscosity by keeping crankcase temperature above ambient conditions
• Protects against compressor damage from liquid slugging and inadequate lubrication at startup

This Danfoss crankcase heater is a critical component for compressor protection in air conditioning systems, heat pumps, refrigeration units, and commercial cooling applications. By maintaining the crankcase at a temperature higher than the coldest part of the system, it prevents refrigerant condensation in the oil and ensures smooth compressor startup. The surface sump heater is particularly essential for systems operating in cold environments or experiencing extended shutdown periods.