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1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the upper air guide. (Refer to section

2.2.1)

3. Remove the blower. (Refer to section 2.2.2)
4. Remove the fan. (Refer to section 2.2.3)
5. Remove the shroud. (Refer to section 2.2.3)
6. Remove the control box. (Refer to section 2.1.3)
7. Remove the 2 screws which fasten the motor.
8. Remove the motor.
9. Re-install the components by referring to  the

above removal procedure. (See figure 18)

1. Remove the cabinet. (Refer to section 2.1.2)
2. Discharge the refrigerant system using a Freon™

Recovery System.
If there is no valve to attach the recovery system,
install one (such as a WATCO A-1) before venting
the Freon™. Leave the valve in place after servic-
ing the system.

3. Remove the 4 screws which fasten the con-

denser.

4. After discharging the refrigerant completely,

detach the interconnecting tube at the condenser
connections.

5. Remove the condenser.
6. Re-install the components by referring to notes.

(See figure 19)

1. Remove the cabinet. (Refer to section 2.1.2)
2. Discharge the refrigerant system using a Freon™

Recovery System.
If there is no valve to attach the recovery system,
install one (such as a WATCO A-1) before venting
the Freon™. Leave the valve in place after servic-
ing the system.

3. Remove the cover E.P.S and the upper air guide.

(Refer to section 2.2.1)

4. After discharging the refrigerant completely,

detach the interconnecting tube at the evaporator
connections.

5. Remove the evaporator.
6. Re-install the components by referring to notes.

(See figure 20)

—11—

1. Remove the cabinet. (Refer to section 2.1.2)
2. Remove the upper air guide. (Refer to section

2.2.1)

3. Discharge the refrigerant system using a Freon™

Recovery System.
If there is no valve to attach the recovery system,
install one (such as a WATCO A-1) before venting
the Freon™. Leave the valve in place after servic-
ing the system.

4. After discharging the refrigerant completely,

detach the interconnecting tube at the CAPIL-
LARY TUBE.

5. Remove the CAPILLARY TUBE.
6. Re-install the component by referring to notes.

—12—

– Replacement of the refrigerating cycle.

1. When replacing the refrigerating cycle, discharge

the refrigerant system using a Freon™ Recovery
System.
If there is no valve to attach the recovery system,
install one (such as a WATCO A-1) before venting
the Freon™. Leave the valve in place after servic-
ing the system.

2. After discharging the unit completely, remove the

desired component, and detach 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 care.
5. Evacuate as follows:

1) Connect the vacuum pump, as illustrated Figure

22A.

2) Start the vacuum pump, slowly open manifold

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

3) Operate the vacuum pump for 20 to 30 minutes,

until 600 microns is obtained. Close valves A
and B and observe vacuum gauge for a few min-
utes. A rise in pressure would indicate a possi-
ble leak or moisture remaining in the system.
With valves A and B closed, stop the vacuum
pump. 

4) Remove the hose from the vacuum pump and

place it on the charging cylinder. See figures
21A and 21B. Open valve C. 
Discharge the line at the manifold connection. 

5) The system is now ready for final charging.

6. Recharge as follows : 

1) Refrigerating cycle 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 suc-
tion line through the access valve which you
install as the system is opened. 

2) Connect the charging cylinder as shown in figure

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

3) Open valve A and allow proper charge to enter

the system. Valve B is still closed. 

4) If more charge is required, the high-side does

not take it. Close valve A. 

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 pressure to drop. 
d. Repeat steps b and c until the balance of the

charge is in the system. 

6) When the satisfactory unit is operating correctly,

use the pinch-off tool with the unit still running
and the clamp on to 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 pinch-off tube closed. Turn off the unit,
allow it to set for a while, and then test the leak-
age of the pinch-off connection. 

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. 

Equipment needed: Vacuum pump, Freon™ Recovery System, 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. 

—13—

B

A

B

A

EXTERNAL 
VACUUM PUMP

LO      HI

C

EVAPORATOR
(LOW PRESSURE SIDE)

CONDENSER
(HIGH PRESSURE SIDE)

B

A

COMPOUND GAUGE 

SEE INSETS

BELOW

MANIFOLD

GAUGE

CAPILLARY TUBE 

COMPRESSOR

CHARGING 
CYLINDER

—14—

487mm (19  /  ")

353

mm
 (13 

 / 

 ")

510mm (20  /   ")

MED

HIGH

1

2

3

4

5

6

7

LOW

THERMOSTAT

OPERATION

8

9

CO

O

LE

R

FA

N

COO

L

LOW

16

3

16

1

8

7

O

CONDENSER COIL

FAN

MOTOR

CAPILLARY TUBE

COMPRESSOR

BLOWER

EVAPORATOR COIL

: REFRIGERANT FLOW

Discharge the refrigerant system using a Freon™ Recovery System.
If there is no valve to attach the recovery system, install one (such as
a WATCO A-1) before venting the Freon™. Leave the valve in place
after servicing the system. Do not vent Freon™ into the atmosphere.