Trane VAL9478 TXV 321894-708 field calibration should be performed

field calibration should be performed by a qualified HVAC technician to match the specific drain/feed parameters of the chiller unit

If the internal motor windings pass a resistance check (typically less than 20 ohms between phases) and show no shorts to ground

s plug-together connectors

This component is compatible with a wide range of residential heating systems

making it compatible with most commercial control panels

Trane VAL9478 TXV 321894-708 field calibration should be performedThe 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