CHARGING THE REFRIGERANT SYSTEM.-Continued

TM5-4120-383-14

5-16.

CHARGING THE REFRIGERANT SYSTEM.-Continued

Open the two charging manifold valves.

f. Open Refrigerant-22 tank valve slightly to allow a small

amount of refrigerant to purge air from hoses. Tighten hose

connections at the air conditioner charging valves.

g. Close low pressure (suction) charging manifold valve. Never

introduce liquid refrigerant into low pressure (suction) charging

valve.

Position Refrigerant-22 tank so that liquid will be used for

charging. (Some drums must be inverted and some are equipped with

a selector valve.)

Use accurate scales to measure and record weight of

Refrigerant-22 drum.

Open Refrigerant-22 drum valve.

k. Open high pressure charging valve on air conditioner. Allow

liquid refrigerant to enter system until drum weight has decreased

by 2.2 pounds (1.0 Kg) or until system pressure has equalized.

l. Close refrigerant drum valve and high pressure (discharge)

manifold valve.

Reset low pressure cut out switch.

Connect power at power source.

o. Turn air conditioner on and operate in cool mode with

TEMPERATURE SELECTOR set at maximum COOLER position.

If 2.2 pounds (1.0 Kg) full charge was obtained, skip steps

If system pressure equalized prior to obtaining a

q. through s.

full charge of 2.2 pounds (1.0 Kg) proceed with step q.

Switch refrigerant drum to gas only position.

r. Be sure refrigerant drum has been switched to gas position

and open refrigerant drum valve, low (suction) pressure charging

manifold valve and low (suction) pressure charging valve on air

conditioner.

s. Monitor weight of the refrigerant drum as air conditioner

compressor pulls additional refrigerant gas into system until full

2.2 pounds (1.0 Kg) charge is obtained. When system is fully

charged, immediately close refrigerant drum valve and air

conditioner low pressure charging valve.

5-39