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If the internal motor windings pass a resistance check (typically less than 20 ohms between phases) and show no shorts to ground
including R-410A and CO2
field calibration should be performed by a qualified HVAC technician to match the specific drain/feed parameters of the chiller unit
This component is compatible with a wide range of residential heating systems
Refer to your unit's technical manual or part list
Trane VAL9478 TXV 321894-708 If the internal motor windingsThe Trane VAL9478 is an OEM grade thermostatic expansion valve (TXV) engineered specifically for 4 ton cooling applications. Designed for high pressure R410A refrigerant, this component features a 3 8" ODF inlet and a 1 2" ODF outlet, ensuring low restriction sweat connections in residential and light commercial air conditioning systems. The 5 foot capillary tube provides the necessary reach for precise bulb placement on the suction line, allowing for
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