Charging Refrigerant System

TM 5-4120-393-14

5-14. Charging Refrigerant System

This task covers:

a. Service

Initial setup.

Tools:

Tool kit, service, refrigeration unit NSN 5180-00-596-1474

Rubber gloves NSN 8415-00-266-8677

Safety goggles NSN 4240-00-052-3776

Personnel. 1

Materials;

Refrigerant cylinder (Appendix E, item 10)

Equipment condition:

1. Turn unit power off at power source. If there is a chance that it will be turned on, also disconnect power

cable to air conditioner.

General Safety Instructions:

WARNING

Death or serious injury may result if personnel fail to observe safety precautions.

Use great care to avoid contact with liquid refrigerant or refrigerant gas being

discharged under pressure. Sudden and irreversible tissue damage can result

from freezing. Wear thermal protective gloves and a face protector or goggles in

any situation where skin-eye-contact is possible.

Prevent contact of refrigerant gas with flame or hot surfaces. Heat causes the

refrigerant to break down and form carbonyl chloride (phosgene), a highly

poisonous and corrosive gas.

SERVICE

After the system has been satisfactorily evacuated, it must be fully charged with refrigerant-22.

CAUTION

Never introduce liquid refrigerant into the low pressure (suction) service valve.

NOTE

The system must be evacuated before charging. Use only refrigerant-22 to charge

the unit. If available, use recycled refrigerant.

Check that the hose from the low pressure service valve is connected to the compound gage side of the charging

manifold. The hose from the high pressure service valve should be connected to the pressure gage side of the

charging manifold.

Change 2 5-29