SHIP STORES REFRIGERATION SPLIT-PLANT OPERATION

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REFRIGERATION (cont)

TM-55-1925-273-10-1 Inland and Coastal Large TUG (LT) NSN 1925-01-509-7013 (EIC XAG) Manual

SHIFTING REFRIGERATION PLANTS

TM 55-1925-273-10-1

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! 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 to OFF. Failure to comply could result in damage to equipment.

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

(0.16-0.17 bar) is indicated on the SUCTION gauges.

SHIP STORES REFRIGERATION SPLIT-PLANT OPERATION

NOTE

The following procedure provides instructions for shifting from two condensers online to one.

CLOSE the dehydrator inlet valve (figure 19, item 4) at reefer condensing unit being secured.

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

WARNING

Injury to personnel could result if the discharge service valve is not opened before con-

denser is started.

CLOSE the compressor suction valve (figure 19, item 7) for the condensing unit being secured.

CLOSE the compressor discharge (figure 19, item 1) valve for the condensing unit being secured.

Set the following switches to OFF on the reefer condenser unit being secured:

Main power disconnect switches (figure 19, item 11)

Power ON/OFF switches (figure 19, item 12)

Secure the condenser cooling water piping system for the reefer condenser being secured as follows:

For reefer condenser 1, CLOSE the following valves:

(1)

GS-38, RETR COND No.1 SPLY (figure 18, item 10), reefer condenser 1 supply

(2)

GS-48, WTR. RGLTR COV (figure 18, item 11), water regulator inlet

For reefer condenser 2, CLOSE the following valves:

(1)

GS-39, RETR COND No.2 SPLY (figure 18, item 14), reefer condenser 2 supply

(2)

GS-49, WTR RGLTR COV (figure 18, item 15), water regulator inlet

Align the operating reefer condenser to the walk in freezer and chill box by completing the following actions.

OPEN RFSS-13, LIQUID LINE CRSVR CO (figure 22, item 1), liquid line crossover cut out

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