Product details Danfoss 7773123 Crankcase Belt Heater | 75W, 230V Product Description: The Danfoss 7773123 is an essential safety accessory for high-capacity Maneurop reciprocating compressors. Providing a constant 75W of heat, this belt-style heater is wrapped around the compressor’s lower shell to keep the internal oil at a temperature above the system’s dew point. In the UAE, this is vital for preventing “off-cycle” refrigerant migration, where gas condenses into the oil crankcase during standby. By maintaining oil purity and preventing foam-over at startup, the 7773123 ensures immediate, effective lubrication, significantly extending the life of pistons, rods, and valves in large commercial and industrial cooling systems. Key Features & Benefits: High-Output 75W Heating: Optimized for large-diameter compressor shells to ensure efficient heat transfer through the thick casing. Eliminates Cold Start Issues: Keeps oil viscosity stable and prevents refrigerant from diluting the lubricant. Robust Belt Design: Easy to install with a secure tensioning mechanism that ensures tight contact with the compressor body. Weather-Resistant Construction: Built with durable insulation materials suited for the harsh, high-ambient conditions of the Middle East. Critical Protection: A small investment that prevents catastrophic compressor failure due to liquid slugging. Technical Specifications : Specifications Value Manufacturer Danfoss Part Number 7773123 Heater Type Belt / Surface Wrap Power Output 75 Watts Voltage 230V Compatibility Maneurop MT / MTZ 100-160 (Large Frame) Lead Length 1 meter (approx.) Application Large Commercial & Industrial Refrigeration FAQs: Q: Why do I need 75W instead of 65W for my compressor? A: Larger compressors have more surface area and more oil; the 75W version provides the necessary thermal energy to heat the increased mass effectively. Q: Is it easy to replace an old heater with the 7773123? A: Yes, the belt design is adjustable and can be swapped out quickly during routine maintenance. Q: Is this heater necessary in the Dubai heat? A: Absolutely. Migration occurs whenever the compressor is the coolest part of the system (e.g., during night-time cycles or in air-conditioned plant rooms). View More View Less
