Objective: Flush out any harmful foreign substance including Compressor oil that might remain inside the Condenser coil.

Procedure:

1. Attach a service valve into the cut-off tube port of high pressure side which is going to be connected to the discharge line of Compressor.
(* Please remove the valve stem before doing solder.)

2. Allow the service valve cool down.

3. Get Nitrogen cylinder ready to connect to the service valve.

4. Open the nitrogen gauge and allow it to blow a couple of times and close it.
(* You can hear sound of blow from the video footage above.)

5. Block the output port of Condenser coil using your thumb and in the meantime get a piece of clean tissue paper and place it close to the output port right behind the thumb.

6. Now open teh nitrogen and wait about a few seconds and allow it to blow by letting go of the thumb and close the nitrogen..

7. Check the tissue paper and see if any harmful foreign substance including compressor oil came out.
(* You may need to go back to STEP 5 to make sure that the Condenser coil has been flushed completely and there is nothiing remain inside.)

Objective: Install Filter Dryer.

Procedure:

1. Get a new Filter Dryer.

2. Place it between the output port of Condenser coil and the input port of Expansion valve.

3. Begin brazing both sides of the Filter Dryer.

4. Examine the brazing spots using mirror to see if you missed any spot.
(* Please make sure of a vapor-proof seal.)

Objective: Flush out any harmful foreign substance including Compressor oil that might remain inside the Evaporator coil.

Procedure:

1. Open Expansion valve with full turns clockwise and leave it open.

2. Connect Nitrogen to the service valve attached on high pressure side tube line.

3. Get a piece of clean tissue paper and place it close to the output port of low pressure side tube line.

4. Open Nitrogen gauge and allow to blow for a while.
(* You can hear sound of blow from the video footage above.)

5. Allow Nitrogen to keep blow and in the meantime block the output port of low pressure side tube line using your thumb and check the Nitrogen gauge to see if the its pressure is high enough to flush out whole refrigeration cycle system.
(* In the above video footage the Nitrogen gauge is read about 270psi.)

6. Now let go of your thumb.
(* You can hear sound of pop out from the output port and there might be Compressor oil or any foreign substance come along.)

7. Go back to STEP 5 if you consider there may be more of Compressor oil or foreign substance remain inside the Evaporator coil.

Objective: Replace the damaged Compressor with a new one.

Procedure:

1. Get a new Compressor.

2. Use tubing cutter to cut the discharge, suction, and service nozzle attached onto the Compressor.
(* Do not remove the nozzle caps at this point.)

3. Solder to attach a service valve onto the cut-off service nozzle after removing the nozzle cap.

4. Set the new Compressor securely in the room after removing the cut-off discharge and suction nozzle caps.

5. Solder to seal discharge and suction tube line.
(* It shoud be done within 10 minutes to prevent the Compressor from getting inside any harmful moisture or foreign substance from outside.)

6. Use a mirror to check if you missed any spot.
(* Please make sure of a vapor-proof seal.)

7. Now, get a service valve and take out vlave stem to protect from welding heat and smoke.

8. Solder to attach the service valve into somewhere between the Condenser and the filter Dryer.
(* The service valve doesn't have to be a 'T' type as shown in the video footage above.)

Objective: Vacuum refrigeration cycle system.

Procedure:

1. Get the valve stems and put them back into the service valves attached onto discharge and suction tube line.

2. Connect manifold gauge to those two service valves and the vacuum pump. (Blue-Low side, Red-High side, Yellow-Vacuum pump)

3. Turn on the vacuum pump.

4. Fully open Low-side and High-side gauge valves.

5. Watch both sides gauge; Low-side should read -30psi and High-side below 0 or all the way down.

6. Allow vacuum pumps for about 10-30 minutes.
(* Meanwhile, it's good chance to replace OLP, PTC and starting capacitor to save some time.)

7. Now, watching the Low-side gauge gently begin to close High-side valve. While closing the High-side valve there should be no change of Low-side gauge reading (remain around -30 psi.)

8. Close the Low-side valve (* There should be no change of sound of vacuum pump.) and shut off the vacuum pump.