h. Close valve (14), then close refrigeration system
h. Set switch (21) and circuit breaker to OFF.
i. Disconnect hose assemblies from oil container and
union (24), and open valve (6).
j. Loosely connect other end of hose assembly from
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
refrigerant charging procedure.
2-8. Checking Oil Quantity in Refrigeration System
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.
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,
d. Close refrigeration system receiver valve and
connect other end of hose assembly loosely on receiver
Do not hold centrifuge tube by the
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;
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.
f. Oil remaining in centrifuge tube should read at a
Section II. OPERATION OF AUXILIARY EQUIPMENT
end item is shown in figure 2-4. Operation of the auxiliary
equipment is incorporated in Section I.
List of auxiliary equipment which is part of the