TXV Kits How to apply a TXV kit to an evaporator coil – Initial installation

TXV Kits

How to apply a TXV kit to an evaporator coil – Initial installation

Coil Preparation

Relieve the pressure from the coil by loosening the 13/16 nut 1 turn only.Remove the nut and discard the black seal

Coil Preparation

Remove the check piston and discard

Coil Preparation

Use a tube cutter to remove the spin closure on the suction line

Coil Preparation

Remove the tailpiece clamped to the exterior

Suction Line Connection

Slide back the suction line grommet before brazingInsert the TXV equalizer line with flare nut into the grommetThen insert the suction line tubing (line set)

Suction Line Connection

Braze suction line tubing (line set) to the suction line field connection on coil

Expansion Valve Connection

Connect expansion valve outlet to flowrator body. Make sure Teflon seal is in place

Expansion Valve Connection

Slide the 13/16 nut into position. Braze tailpiece to the liquid tube (line set)

Expansion Valve Connection

AFTER THE TAILPIECE HAS COOLED, position the white Teflon seal and hand tighten the nut

Expansion Valve Connection

Torque the 13/16 nut to 10-30 ft/lb

Expansion Valve Connection

Connect equalizer tube with 1/4 flare nut to suction line fitting on the suction manifold (internal to the case)

Expansion Valve Connection

Torque to 8-10 ft/lbDress the tube to avoid rubbing and replace the grommet

Expansion Valve Connection

Secure expansion valve bulb to suction line (exterior to the case) with banding straps provided at the 10 o’clock or 2 o’clock positionIMPORTANT: Insulate the bulb and adjacent area

Wrap Up

Finally – Check for leaks

Thank You!