Charging Refrigeration System with Refrigerant

TM 5-4130-234-13&P

h. Close valve (14), then close refrigeration system

h. Set switch (21) and circuit breaker to OFF.

receiver valve.

i. Disconnect hose assemblies from oil container and

union (24), and open valve (6).

j. Loosely connect other end of hose assembly from

WARNING

valve (11) to refrigeration system receiver valve.

k. Slowly open valve (11) until oil starts leaking from

Exercise care in disconnecting hose

refrigeration system receiver valve, then tighten fitting on

assembly from service unit and from

hose assembly and crack receiver valve.

receiver valve to prevent refrigerant

I. Open refrigeration system receiver valve and

from getting in the eyes or permanent

charge system with oil from beaker (4).

damage to the eyes may result.

m. Close refrigeration system receiver valve and

Remove hose assembly and recap and close valve

valve (11). Remove hose assemblies and proceed to

(14).

refrigerant charging procedure.

2-8. Checking Oil Quantity in Refrigeration System

2-7.

Charging Refrigeration System with Refrigerant

a. Operate refrigeration system for 15 minutes to mix

a. Set circuit breaker (22) to ON and switch (21) to

refrigerant thoroughly with the oil.

HEATER ON.

b. Connect charge line to service valve on

b. Cap and close valves (5, 12).

refrigeration system receiver.

c. Close valve (14) and connect hose assembly (5,

fig. 2-4) with gaskets (3) to valve (14, fig. 2-3).

WARNING

d. Close refrigeration system receiver valve and

connect other end of hose assembly loosely on receiver

Do not hold centrifuge tube by the

valve.

stem; hold with gloves or cloth to

e. Allow pressure to stabilize at 59 to 69 psig as

protect hands from cold refrigerant.

indicated on gage (7).

c. Open service valve and direct flow of refrigerant-

f. Crack valve (14) to purge air from hose assembly;

oil mixture into centrifuge tube (10, fig. 2-4).

then tighten fitting on hose assembly at receiver valve.

d. Close service valve when level in centrifuge tube

g. Open valve (14) fully and note liquid level on scale

reaches 100 cc.

(8). Open receiver valve fully to charge refrigeration

e. Place centrifuge tube in a warm area and allow

system with specified amount refrigerant as measured on

liquid refrigerant to boil off.

scale (8).

f. Oil remaining in centrifuge tube should read at a

specific quantity.

Section II. OPERATION OF AUXILIARY EQUIPMENT

end item is shown in figure 2-4. Operation of the auxiliary

2-9.

Auxilliary Equipment

equipment is incorporated in Section I.

List of auxiliary equipment which is part of the

2-9