EVAPORATOR COIL, MALE COUPLING HALF AND EXPANSION VALVE - continued

TM9 4120-423-14&P

Shake out excess water prior to installation.

REPAIR OR REPLACEMENT

Repairs are limited to replacement of distributor, rivets, plate nuts, and the straightening of

mashed fins.

Plate nuts may be removed by drilling out the old rivets using a drill bit slightly smaller than the

diameter of the rivet.

Install new plate nut(s) and rivets.

If fins are mashed or dented so that the airflow across the coil would be blocked, straighten them

using a plastic fin comb.

Using wrench, carefully disconnect the low and high condenser to evaporator Refrigerant R-22

metal hose line connectors from the coupling halves. See WP0091.

INSTALLATION

Tubing should be nitrogen purged during all brazing/debrazing operations.

Clean and prepare distributor, tubing and elbow prior to installing new expansion valve. (See

Slip expansion valve in place in original position and check that fittings and tubing fit properly

into expansion valve solder cups.

Wrap wet rags around expansion valve body and distributor tubes.

Using torch, braze the three expansion valve joints in accordance with WP0072.

Slip the sensing bulb into its mounting bulb straps. Be sure the bulb is on top of the suction line

in original position and tighten the two nuts and screws. Be sure the sensing bulb is making

good metal-to-metal contact with the suction line.

Replace the insulation tape that was removed from the sensing bulb and expansion valve

connections. Use insulation tape, applied in spiral with overlapping edges.

WARNING

When handling coils, wear gloves to avoid cuts and reduce fin damage on the coil.

0078 00-5