Friedrich CP05N10A Bedienungsanleitung PDF herunterladen (Seite 10)

2.4.2 EVAPORATOR

1. Remove the cabinet.

2. Discharge the refrigerant by using a refrigerant

recovery system.

3. Remove the upper air guide . (Refer to Section

2.2.1)

4. After discharging the refrigerant completely,

unbraze the interconnecting tube at the condenser

connections.

5. Remove the evaporator.

6. Re-install by referring to the procedures above.

2.4.3 CAPILLARY TUBE

1. Remove the cabinet.

2. Discharge the refrigerant by using a refrigerant

recovery system.

3. Remove the upper air guide. (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.

NOTES

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 completing the above procedures, the valve

must be removed .

6. Evacuate as follows:

6-1. Connect the vacuum pump, as illustrated in

figure 20A.

6-2. Start the vacuum pump. Slowly open manifold

valves A and B with 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

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 min-

utes, 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 remaining 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

20B. 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 fig-

ure20B. 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 39 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 cut-

ter, 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 leak-

age of the pinch-off connection.

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