REPLACEMENT (Cont) - TM-55-1905-223-24-170282

TM 55-1905-223-24-17

(16)

Close valve (6) on refrigerant container (7) fully clockwise.

(17)

With caps (5) and (9) removed for access to valve stems, slowly open both suction and discharge

valve stems three turns counterclockwise. The compressor is no longer isolated from the system.

(18)

Leave portable gauge manifold hooked up and restore electrical power to the air conditioner assembly.

(19)

Start and run the compressor.

(20)

Add R-22 refrigerant as necessary to bring operating pressures to normal:

(a)

Normal Suction Pressure = 58 to 72 psig (See 2, FIGURE 4-16).

(b)

Normal Discharge Pressure = 190 to 250 psig (See 3, FIGURE 4-16).

(21)

Add additional R-22 refrigerant, by first opening the valve (6, FIGURE 4-24) on refrigerant container

(7); then slowly opening gauge port handwheel (1) on the gauge manifold counterclockwise one-half to

one turn. When operating pressures are within normal range, close gauge port handwheel.

(22)

Observe the refrigerant sight glass in the liquid line. If bubbles, or an intermittent stream of bubbles

(FIGURE 4-25) are present, add additional refrigerant until sight glass shows clear. Do not add

refrigerant after sight glass clears.

(23)

Close valve (6) on refrigerant container (7).

(24)

Turn suction valve stem and discharge valve stem fully counterclockwise and install valve caps (9) and

(5).

(25)

Purge lines before disconnecting.

(26)

Disconnect gauge manifold hoselines from connections (10), (4), and (8).

h. Remove "Out of Service" tag from circuit.

4-75