Danfoss 7773107 Belt

The Danfoss 7773107 Crankcase Heater Belt is a heavy-duty 65W 230V heating solution specifically engineered for the refrigeration and air conditioning industry. Designed to fit securely around the bottom of the compressor shell, this belt type crankcase heater effectively prevents refrigerant migration and oil dilution during the compressor off-cycle. By maintaining the oil at an optimal temperature, it ensures consistent oil viscosity, facilitating smoother startups and preventing liquid slugging that can lead to catastrophic mechanical failure in scroll, reciprocating, or screw compressors.

Built for the rigors of industrial environments, the Danfoss 7773107 provides reliable heat transfer across its entire surface. This 2C configuration is ideal for technicians looking to optimize HVAC system efficiency in cold-weather applications where low ambient temperatures threaten internal lubrication. The compact, flexible design allows for a snug fit on various compressor housings, ensuring that the crankcase heater delivers the necessary thermal energy to prevent refrigerant from condensing into the oil, thereby protecting critical internal components like bearings and pistons from premature wear.

Key Benefits

• Prevents Refrigerant Migration: Keeps refrigerant from mixing with compressor oil, maintaining high lubrication quality.
• Optimized Startup Efficiency: Increases oil temperature to reduce viscosity, ensuring the compressor starts easily in low-ambient conditions.
• Enhanced Component Protection: Minimizes the risk of liquid slugging and mechanical stress on internal parts during the initial start-cycle.
• Durable Construction: Engineered to withstand the demanding thermal cycles of commercial HVACR machinery.
• Precision Heating: 65W output at 230V provides consistent and focused heat direct to the crankcase sump.

Common Questions

• Does this heater require a specific mounting position? Yes, install the belt as low as possible on the compressor shell to ensure maximum heat transfer to the oil reservoir, but avoid covering weld seams.
• Should the heater stay energized while the compressor is running? Typically, crankcase heaters are wired to de-energize when the compressor is active and engage immediately upon shutdown to prevent migration during the off-cycle.
• How do I verify if the heater is functioning? Use an amp clamp to verify current draw or a non-contact thermometer to confirm the belt is generating heat while energized.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.