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1. Remove the cabinet. (Refer to Section 2.1.2) 
2. Discharge the refrigerant by using a refrigerant

recovery system.

3. Remove the orifice. (Refer to Section 2.2.1)
4. After discharging the refrigerant completely,

unbraze the interconnecting tube at the evaporator 
connections.

5. Remove the evaporator.
6. Re-install by referring to the procedures above.

1. Remove the cabinet. (Refer to Section 2.1.2)
2. Discharge the refrigerant by using a refrigerant

recovery system.

3. Remove the orifice. (Refer to Section 2.2.1)
4. After discharging the refrigerant completely,

unbraze the interconnecting tube of the capillary
tube.

5. Remove the capillary tube.
6. Re-install by referring to the procedures above.

Replacement of the refrigeration cycle. 

1. When replacing the refrigerating cycle, be sure to

discharge the refrigerant by using a refrigerant
recovery system.

2. After discharging the unit completely, remove the

desired components, and unbraze the pinch-off
tubes. 

3. Solder service valves into the pinch-off tube ports,

leaving the valves open. 

4. Solder the pinch-off tubes with service valves.  
5. After doing the above procedures, the valve must

be closed and left in place on the system for any
subsequent procedures.

6. Evacuate as follows: 
6-1. Connect the vacuum pump, as illustrated figure

21A. 

5-2.  Start the vacuum pump. Slowly open manifold

valves A and B with two full turns counterclock-
wise and leave the valves closed. 
The vacuum pump is now pulling through valves
A and B up to valve C by means of manifold and
the entire system. 

CAUTION : If high vacuum equipment is used,
just crack valves A and B for a few minutes, then
open slowly with the two full turns counter-clock-
wise. This will keep oil from foaming and being
drawn into the vacuum pump. 

6-3.  Operate the vacuum pump for 20 to 30 minutes,

until 600 micron vacuum is obtained. 
Close valves A and B and observe vacuum
gauge for a few minutes. 
A rise in pressure would indicate a possible leak
or moisture remains in the system. 
With valves A and B closed, stop the vacuum
pump. 

6-4.  Remove the hose from the vacuum pump and

place it on the charging cylinder. See figure 23B.
Open valve C. 
Discharge the line at the manifold connection. 

6-5. The system is now ready for final charging. 
7. Recharge as follows : 
7-1.  Rotary compressor systems are charged from

the high-side. If the total charge cannot be put in
the high-side, the balance will be put in the 
suction line through the access valve which is
installed as the system is opened. 

7-2.  Connect the charging cylinder as shown in figure

21B. With valve C open, discharge the hose at
the manifold connection. 

7-3.  Open valve A and allow the proper charge to

enter the system. Valve B is still closed. 

7-4.  If more charge is required, the high-side will not

take it. Close valve A. 

7-5.  With the unit running, open valve B and add the

balance of the charge. 

a. Do not add the liquid refrigerant to the low-side. 
b. Watch the low-side gauge, allow pressure to rise

to 30 lbs. 

c. Turn off valve B and allow the pressure to drop. 
d. Repeat steps B and C until the balance of the

charge is in the system. 

7-6. When the unit is operating correctly, use the

pinch-off tool with the unit still running and the
clamp on the pinch-off tube. Using a tube cutter,
cut the pinch-off tube about 2 inches from the
pinch-off tool. Use sil-fos solder and solder the
pinch-off tube closed. Turn off the unit, allow 
setting for a while and then test the leakage of
the pinch-off connection. 

—10—

—11—

Equipment needed: Vacuum pump, charging cylinder, manifold gauge, brazing equipment, pinch-off tool capable
of making a vapor proof seal, leak detector, tubing cutter, hand tools to remove components, service valve. 

B

A

B

A

B

A

COMPOUND GAUGE 

SEE INSETS

BELOW

CAPILLARY TUBE 

EVAPORATOR
(LOW PRESSURE SIDE)

COMPRESSOR

CONDENSER
(HIGH PRESSURE SIDE)

EXTERNAL VACUUM PUMP

LO      HI    CHARGING CYLINDER

MANIFOLD

GAUGE

C

—20—

MOTOR

C

F

H

7

8

6

4

2

1

5

3

H

L

M

POWER INPUT 

ROTARY SWITCH

THERMOSTAT

BR

BK

RD

BL

BK

RD

BL

OR(BR)

YL

BK(BR)

(Plain)

WH(BL)

(Ribbed)

GN(GN/YL)

COMP.

YL

OR(BR)

R

S

C

YL

ROCKER SWITCH

BR

BR

SYNC. M.

CAPACITOR

BK

RD

BL

BK

RD

BL

BR

OLP

5

1

2

9

6

8

7

3

4

10

3854AR2330A
WIRING DIAGRAM

1

1

1

1

1

1

1

1

1

1

1

2

3

4

5

6

7

8

9

10

POWER CORD ASM

FAN MOTOR

COMPRESSOR

ROTARY SWITCH

THERMOSTAT

CAPACITOR

CONDUCTOR ASM

OVERLOAD PROTECTOR

CONNECTOR ASM

CONNECTOR ASM

2H01580M

4681A20001B

5416A20001E

2H00154H

2H01109H

6120AR2194H

2H01045E

6750U-L047A

6631AR3843K

6877A20001A

3828AR3735S  —1—

2

3

4

E

F

A

1

1

10

3

4

1

2

1

2

1

2

9

6

2

5

7

5

8

10

8

4

7

1

2

3

4

5

6

7

11

6

12

9

8

9

10

5

4

3

4

3

7

6

B

D

C

3