Transcript TXV Kits - Johnstone Supply

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 brazing
Insert the TXV equalizer line with flare nut into the grommet
Then 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/lb
Dress 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 position
IMPORTANT: Insulate the bulb and adjacent area
Wrap Up
Finally – Check for leaks
Thank You!