Installation Instructions

Table Of Contents

31-5000486 Rev. 2 15

Thermal Expansion Valve (TXV)

Factory Installed Expansion Valves: Sensing bulbs are

factory installed and clamped to the suction line. For

optimum performance, reattach and insulate the bulb

at a 10 or 2 o’clock position outside of the cabinet to

the main suction line no more than one foot from the

suction line connection. If necessary, the bulb can be

installed on a vertical suction line. In this instance, the

bulb must be placed before any trap, with the bulb’s

capillary tube facing upward.

Thermal Expansion Valve (Letter A)

NOTE: Some models are equipped with thermo expansion

valve and do not require any orifice change.

NOTE: The coil comes pre-charged with refrigerant

R410A. The coil must be evacuated if the TXV valve is

changed.