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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 overload protector.

(Refer to Section 2.3.1)

4. After discharging the unit completely, unbrace the

suction and discharge pipes at the compressor
connections.

5. Remove 3 nuts which fasten the compressor.
6. Remove the compressor.
7. Re-install by referring to the removal procedure

above. (See Figure 14)

1. Remove the cabinet. (Refer to Section 2.1.2)
2. Remove the control board. 

(Refer to Section  2.1.3)

3. Discharge the capacitor by placing a 20 K

Ω

resistor across the capacitor terminals.

4. Remove the screw which fastens the capacitor

clamp. (See Figure 15)

5. Remove all the leads of capacitor terminals.
6. Remove the capacitor
7. Re-install the components by referring to the

removal procedure above.

1. Remove the cabinet. (Refer to Section 2.1.2)
2. Remove the control board. 

(Refer to Section 2.1.3)

3. Remove 2 screws which fasten the thermostat.

(See Figure 16)

4. Remove all the leads of the thermostat terminals.
5. Remove the thermostat.
6. Re-install the components by referring to the

removal procedure above.

1. Remove the cabinet. (Refer to Section 2.1.2)
2. Remove the control board. 

(Refer to Section 2.1.3)

3. Remove 2 screws which fasten the rotary switch.

(See Figure 17)

4. Remove all the leads of the rotary switch 

terminals.

5. Remove the rotary switch.
6. Re-install the components by referring to the

removal procedure above.

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1. Disconnect the unit from the power source.
2. Remove the front grille. (Refer to Section 2.1.1)
3. Remove the cabinet. (Refer to Section 2.1.2)
4. Remove the control board. 

(Refer to Section 2.1.3)

5. Remove the orifice. (Refer to Section 2.2.1)
6. Remove the compressor, evaporator, and 

condenser. (Refer to Section 2.2.2)

7. Remove the fan and blower wheel.

(Refer to section 2.2.2)

8. Remove the motor. (Refer to Section 2.2.3)
9. Remove the air guide. (Refer to Section 2.2.3)

10. Re-install by referring to procedures above.

1. Disconnect the unit from the power source.
2. Remove the front grille. (Refer to Section 2.1.1)
3. Remove the cabinet. (Refer to Section 2.1.2)
4. Remove 2 screws that secure control board to

base pan and orifice (Refer to Section 2.1.3).

5. Pulls the control board toward you.
6. Disconnect the 2 receptacles and remove the

grounding screw.

7. Remove a screw securing the clip with cord to the 

control board. (See Figure 19)

8. Pull the power cord.
9. Re-install by referring to procedures above.

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

recovery system.

3. Remove 2 screws which fasten the condenser.

(See Figure 20)

4. After discharging the refrigerant completely,

unbraze the interconnecting tube at the 
condenser connections.

5. Remove the condenser.
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 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. 

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—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