Danfoss 7773109 Crankcase Belt Heater | 65W, 230V

Product Description:

The Danfoss 7773109 is a critical safety component for Maneurop reciprocating compressors (MT and MTZ series). This 65W belt heater wraps securely around the base of the compressor shell, ensuring that the lubricant remains at a higher temperature than the rest of the system during off-cycles. In the UAE, where temperature fluctuations between day and night can cause refrigerant migration, this heater prevents liquid refrigerant from mixing with the oil. By keeping the oil “dry,” it ensures immediate and safe lubrication upon startup, effectively protecting the internal valves and pistons from the catastrophic effects of liquid slugging.

Key Features & Benefits:

• Reliable Oil Temperature Control: Maintains the lubricant at an optimal viscosity for safe startup in any environment.
• Prevents Liquid Slugging: Eliminates refrigerant migration into the oil crankcase during system standby.
• Easy Belt-On Design: Features a flexible, adjustable strap for quick and secure installation around the compressor base.
• Durable for UAE Climate: Built with high-quality insulation materials that withstand the intense heat of Middle Eastern plant rooms.
• Universal 230V Compatibility: Designed for standard single-phase power supply, making it easy to integrate into existing control circuits.

Technical Specifications :

FAQs:

• Q: When should the crankcase heater be active?
• A: It should ideally be energized whenever the compressor is OFF to keep the oil warm and ready for the next start.
• Q: Is this heater necessary in the hot UAE climate?
• A: Yes. Even in hot climates, if the compressor is cooler than the evaporator during the night, refrigerant will migrate to the oil, causing foam and wear during startup.
• Q: Can this be used on other compressor brands?
• A: While designed for Maneurop, it can fit other compressors of a similar diameter, provided the wattage and voltage match the system requirements.