Friedrich SH15L30-A Manual De Usuario

9

 NOTE: This procedure can be sped up by the 
use of heat lamps, or by breaking the vacuum 
with refrigerant or dry nitrogen at 5,000 microns.  
Pressure system to 5 PSIG and leave in the sys-
tem a minimum of 10 minutes. Recover refriger-
ant, and proceed with evacuation to a pressure 
of 200 microns or a minimum of 10%.

11. Break the vacuum by charging the system from 

the high side with the correct amount of refrigerant 
specifi ed.  This will prevent boiling the oil out of the 
crankcase.

 

NOTE: If the entire charge will not enter the high 

side, allow the remainder to enter the low side 
in small increments while operating the unit.

12. Restart the unit several times after allowing 

pressures to stabilize.  Pinch off the process tubes, 
cut and solder the ends.  Remove the pinch off tool, 
and leak check the process tube ends.

1.  Recover all refrigerant and oil from the system.

2.  Remove the compressor, capillary tube and fi lter 

drier from the system.

3.  Flush the evaporator, condenser and all connecting 

tubing with dry nitrogen, or equivalent, to remove all 
contamination from the system.  Inspect the suction 
and discharge lines for carbon deposits.  Remove 
and clean if necessary.

4.  Reassemble the system, including a new drier-

strainer and capillary tube.

5.  Proceed with processing as outlined under hermetic 

component replacement.

The following procedure applies when replacing 
components in the sealed refrigeration circuit or 
repairing refrigerant leaks.  (Compressor, condenser, 
evaporator, capillary tube, refrigerant leaks, etc.)

1.  Recover the refrigerant from the system at the 

process tube located on the high side of the system 
by installing a line tap on the process tube.  Apply 
the gauge from the process tube to EPA approved 
gauges from the process tube to the EPA approved 
recovery system.  Recover the CFC’s in the system 
to at least 5%.

2.  Cut the process tube below the pinch off in the 

suction side of the compressor.

3.  Connect the line from the nitrogen tank to the 

suction process tube.

4.  Drift dry nitrogen through the system and unsolder 

the more distant connection fi rst. (Filter drier, high 
side process tube, etc.)

5.  Replace the inoperative component, and always 

install a new fi lter drier.  Drift dry nitrogen through 
the system when making these connections.

6.  Pressurize  the  system  to  30  PSIG  with  proper 

refrigerant and boost the refrigerant pressure to 
150 PSIG with dry nitrogen.

7.  Leak test the complete system with the electric 

halogen leak detector, correcting any leaks 
found.

8.  Reduce the system to zero gauge pressure.

9.  Connect the vacuum pump to the high side and 

low side of the system with deep vacuum hoses, 
or copper tubing. (Do not use regular hoses.)

10. Evacuate the system to an absolute holding 

pressure of 200 microns or less.