Danfoss 7773122 Crankcase Belt Heater | 70W, 230V

Product Description:

The Danfoss 7773122 is an essential protective accessory for large-frame Maneurop reciprocating compressors. Providing a steady 70W of heating power, this belt heater wraps around the lower part of the compressor housing to keep the crankcase oil warmer than the rest of the refrigeration circuit. This is particularly crucial in the UAE during high-humidity periods or night-time temperature drops, as it prevents refrigerant from condensing in the oil. By keeping the lubricant pure and “dry,” the 7773122 ensures that the compressor starts with full lubrication, protecting vital internal components from the mechanical stress and potential damage caused by liquid slugging.

Key Features & Benefits:

• Enhanced 70W Heating Power: Specifically rated for larger compressor shells to ensure uniform oil heating.
• Prevents Oil Dilution: Keeps refrigerant out of the oil, ensuring the lubricant maintains its specified viscosity for safe startup.
• Rugged Belt Construction: Designed for easy, snug fitment with a durable tensioning system that resists vibration.
• Middle East Climate Ready: Features high-grade thermal insulation to ensure efficient heat transfer even in high-ambient UAE plant rooms.
• Safety First: Minimizes the risk of “foaming” at startup, which is a leading cause of premature piston and valve wear.

Technical Specifications :

FAQs:

• Q: Which compressor models use the 7773122?
• A: It is designed for larger Maneurop models, typically ranging from MT/MTZ 100 to 160 (8 HP to 13 HP).
• Q: Does it stay on while the compressor is running?
• A: Usually, it is wired to a “normally closed” contactor so it turns OFF when the compressor runs and ON when it stops.
• Q: Can this be used for scroll compressors?
• A: While primarily for Maneurop reciprocating units, it can be used on any compressor shell of similar diameter, provided the wattage is appropriate.