AIR CONDITIONING SPLIT-PLANT OPERATION

Custom Search

TM 55-1925-273-10-1

0082 00

! CAUTION

Liquid refrigerant returning to the condenser is indicated by a sudden drop in suction tempera-

ture and a rapid fluctuation in suction pressure. If the suction temperature and oil pressure do not

stabilize, or if the condenser develops a knock, immediately stop condenser by placing power

disconnect ON/OFF switch in the OFF position.

Slowly adjust the compressor suction valves (figure 19, item 7) as needed until proper suction pressure of 2.3 to 2.4

PSI (0.16-0.17 bar) has stabilized as indicated on the SUCTION gauge.

AIR CONDITIONING SPLIT-PLANT OPERATION

NOTE

The air conditioning system normally has both plants in operation. This procedure aligns the

system for use with only one air conditioning condenser unit.

Secure one condensing unit by completing the following:

Place the DEHYDRATOR INLET valve (figure 19, item 4) on the condenser unit being secured in the CLOSED

position.

Allow the condenser to operate until it is shut down automatically by the suction pressure switch.

CLOSE the following valves on the condenser being secured:

(1)

Compressor discharge valve (figure 19, item 1)

(2)

Condenser outlet valve (figure 19, item 2)

(3)

Dehydrator outlet valve (figure 19, item 3)

(4)

Dehydrator inlet valve (figure 19, item 4)

(5)

Relief valve bypass valve (figure 19, item 5)

(6)

Water regulator valve actuating line valve (figure 19, item 6)

(7)

Compressor suction valve (figure 19, item 7)

Align air conditioning piping as follows:

In AMS 2, slowly OPEN the following valves:

(1)

RFAC-39, LIQUID LINE CRVR CO. liquid line crossover cut out (figure 20, item 1)

(2)

RFAC-41, SUCT LINE CRSVR COV. suction line crossover cut out (figure 20, item 2)

Secure general service piping by placing the following valves for the condensing unit being shut down in the CLOSED

position:

Air conditioning condensing unit 1:

(1)

GS-33, A/C COND No. 1 SPLY (figure 18, item 1), air conditioning condenser 1 supply

(2)

GS-36, WTR RGLTR COV (figure 18, item 2), water regulator inlet

0082 00-16