Friedrich CP10F10 User Manual

Page 13

13 Room Air Conditioner

Disassembly

— Replacement of the refrigeration cycle.

1. When replacing the refrigeration cycle, be sure to

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.

2. After discharging the unit completely, remove the

desired component, 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. Evacuate as follows.

1) Connect the vacuum pump, as illustrated figure

2) Start the vacuum pump, slowly open manifold

valves A and B with two full turns counterclock-

wise and leave the valves open.

The vacuum pump is now pulling through valves

A and B up to valve C by means of the manifold

and entire system.

CAUTION: If high vacuum equip-

ment is used, just crack valves A

and B for a few minutes, then open

slowly with the two full turns counter-

clockwise. This will keep oil from foaming

and being drawn into the vacuum pump.

3) Operate the vacuum pump vaccum for 20 to 30

minutes, until 600 microns of vaccum is

obtained. Close valves A and B, and observe

vacuum gauge for a few minutes. A rise in pres-

sure would indicate a possible 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 figure

B. Open valve C.

Discharge the line at the manifold connection.

5) The system is now ready for final charging.

6. Recharge as follows :

1) Refrigeration 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

suction line through the access valve which you

installed as the system was opened.

2) Connect the charging cylinder as shown in figure

33B.

With valve C open, discharge the hose at the

manifold connection.

3) Open valve A and allow the proper charge to

enter the system. Valve B is still closed.

4) If more charge is required, the high-side will 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 39 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 satisfied the unit is operating correctly,

use the pinch-off tool with the unit still running

and 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 braze and braze

pinch-off tube closed. Turn off the unit, allow it to

set for a while, and then test the leakage of the

pinch-off connection.

NOTICE

2. EVAPORATOR

3. CAPILLARY TUBE

Figure 13

1. Remove the cabinet.
2. Remove the 2 screws which fasten the evaporator.
3. Move the evaporator sideways carefully.
4. After discharging the refrigerant completely,

unbraze the interconnecting tube at the evaporator
connections.

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

(See Figure 1)

1. Remove the cabinet.
2. After discharging the refrigerant completely,

unbraze the interconnecting tube at the capillary
tube.

3. Remove the capillary tube.
4. Re-install the component by referring to notes.