Trane HTR9493 Crankcase Heater

The Trane HTR09493 is an OEM belt-type crankcase heater engineered for high-capacity 460-volt HVAC systems, specifically within the RTAC and CGAM chiller series. This 160-watt heating element serves as a critical line of defense against refrigerant migration and oil dilution during the compressor's off-cycle. By maintaining the oil at a temperature significantly higher than the system's saturation point, the HTR09493 crankcase heater ensures proper lubrication is available immediately upon startup, mitigating the risk of compressor slugging and premature bearing wear often caused by liquid refrigerant in the crankcase.

Designed for professional field installation, this 460V 160W crankcase heater features a 12.51-inch diameter belly band configuration that provides tight, uniform thermal contact with the compressor shell. Reliable operation in cold ambient conditions is essential for HVAC compressor protection, especially in heat pump or chiller applications where low-temperature starts are frequent. When replacing a failed unit, verify that the 17-inch leads are routed away from sharp edges and discharge lines to ensure electrical integrity across the 460V 60Hz circuit.

• Prevents Flooded Starts: Eliminates liquid refrigerant from the oil reservoir to prevent oil foaming and mechanical stress.
• OEM Compatibility: Specifically designed for Trane RTAC and CGAM chiller compressors, ensuring precise fit and wattage output.
• High-Voltage Efficiency: Rated for 460 Volts, providing a consistent 160-watt thermal output for large-diameter compressor housings.
• Belly Band Design: Ensures 360-degree heat transfer to the bottom of the compressor where oil settles.

How do I test if a Trane HTR09493 is still functional?
Disconnect the heater from the power source and perform a resistance (ohm) check across the leads. An "OL" or open line reading indicates a broken heating element that requires immediate replacement.

When should the crankcase heater be energized?
For maximum protection, the heater must be energized for at least 24 hours prior to the initial compressor startup to drive off any accumulated refrigerant in the lubrication system.

Can I use this on a 208-230V system?
No. This component is rated for 460V 60Hz and will not operate correctly or safely on lower voltage circuits.

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.