Справочник Пользователя для Friedrich PTAC - R410A

Recommended procedure for compressor  
replacement 

1.    Be  certain  to  perform  all  necessary  electrical  and 

refrigeration  tests  to  be  sure  the  compressor  is 
actually defective before replacing. 

2.    Recover  all  refrigerant  from  the  system  though 

the  process  tubes.  PROPER  HANDLING  OF 
RECOVERED  REFRIGERANT  ACCORDING  TO 
EPA  REGULATIONS  IS  REQUIRED.    Do  not  use 
gauge  manifold  for  this  purpose  if  there  has  been 
a  burnout.  You  will  contaminate  your  manifold  and 
hoses.  Use  a  Schrader  valve  adapter  and  copper 
tubing for burnout failures.

COMPRESSOR REPLACEMENT

Unplug and/or disconnect all electrical power 
to the unit before performing inspections, 
maintenances or service. 

Failure to do so could result in electric shock, 
serious injury or death.

Sealed Refrigeration System contains refrigerant 
and oil under high pressure.

Proper safety procedures must be followed, 
and proper protective clothing must be worn 
when working with refrigerants.

Failure  to  follow  these  procedures  could 
result in serious injury or death. 

Extreme care, proper judgment and all safety 
procedures  must  be  followed  when  testing, 
troubleshooting, handling or working around 
unit while in operation with high temperature 
components.  Wear  protective  safety  aids 
such as: gloves, clothing etc. 

Failure to do so could result in serious burn 
injury.

The  use  of  a  torch  requires  extreme  care  and  proper 
judgment.  Follow  all  safety  recommended  precautions 
and  protect  surrounding  areas  with  fi re  proof  materials. 
Have a fi re extinguisher readily available. Failure to follow 
this  notice  could  result  in  moderate  to  serious  property 
damage.

3.      After  all  refrigerant  has  been  recovered,  disconnect  

suction and discharge lines from the compressor and  
remove  compressor.  Be  certain  to  have  both  suction  
and discharge process tubes open to atmosphere. 

4.     Carefully pour a small amount of oil from the suction  

stub  of  the  defective  compressor  into  a  clean 
container.  

9.      Evacuate the system with a good vacuum pump capable   

of  a  fi nal  vacuum  of  200  microns  or  less.  The  system
should be evacuated through both liquid line and suction 
line gauge ports. While the unit is being evacuated, seal 
all openings on the defective compressor. 

10.    Recharge  the  system  with  the  correct  amount  of

  refrigerant.  The  proper  refrigerant  charge  will  be
   found on the unit rating plate. The use of an accurate

         measuring device, such as a charging cylinder,
         electronic scales or similar device is necessary.

5.     Using an acid test kit (one shot or conventional kit), test  

the  oil  for  acid  content  according  to  the  instructions  
with the kit. 

6.      If  any  evidence  of  a  burnout  is  found,  no  matter  how  

slight, the system will need to be cleaned up following  
proper procedures. 

7.    Install the replacement compressor. 

8.  Pressurize with a combination of R-410A and nitrogen

 
Repeat Step 8 to insure no more leaks are present.

The use of nitrogen requires a pressure
regulator. Follow all safety procedures and 
wear protective safety clothing etc. 

Failure to follow proper safety procedures 
result in serious injury or death. 

Proper safety procedures must be followed, 
and proper protective clothing must be worn 
when working with liquid refrigerant.

Failure to follow these procedures could 
result in minor to moderate injury.

and leak test all connections with leak detector capable of 
detecting HFC (Hydrofl uorocarbon) refrigerant. Recover 
refrigerant/nitrogen mixture and repair any leaks found.

NEVER, under any circumstances, charge a rotary 
compressor through the LOW side. Doing so would 
cause permanent damage to the new compressor.

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