Ries Hitachi Highly WHP15600VSD, Installation Manual

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Non-liquid compression sound, current increase, vibration increase, etc. occur. In 

order  to  prevent  liquid  compression,  auxiliary  reservoirs  can  be  added  or  the 

amount of refrigerant enclosed can be reduced. No matter what the conditions, the 

refrigeration  system  should  not  have  liquid  back  to  the  compressor.  Under  normal 

operating conditions, superheated gas should be returned to the compressor.

18 Purge parts with dry nitrogen or dry air to remove remains in parts 

(dust, detergent,etc.)

before assembly of system. Time fur purging: over one second

   for pipe; over three seconds for heat exchanger. Purging pressure: 0.9±0.1MpaG.
   Dew point of dry air: Below –20℃. The motor winding temperature should be less
   than 149℃and hermetic terminal body temperature should be less than 177℃in process
   of manufacturing. 

19 Apply for vehicle
  

   The compressor should not be used on moving equipment such asm automobiles,trains,

     ships, etc.

20 Installation   

The rotational axis of compressor should be kept vertical during operation. But in 

actual

application the axis incline must be within 5

°

at all directions during 

operation. 

21 Pipe vibration   

The  displacement  of  the  pipes,  which  connect  from  the  compressor  to  other  parts 

of  the refrigerate-or systems, should be less than 0.8mm(1/32

”

)when the compressor 

is operating at

allowable rotational speed range and voltage range of rated ±10%. 

Displacement in excess of 0.8mm(1/32

”

) will require changing tube length and/or 

routing.

 22 Connecting tube design 

In designing and routing tubing that connect from the comprssor to the other parts of 

the air conditioner, following should be considered. 

Moving tubes to the moving parts; minimum clearance 12.7mm(1/2”) 

Moving tubes to non-moving parts; minimum clearance 9.5mm((3/8”) 

Moving tubes never touch to lead wire.