Hisense kf-2302gwe User Guide

13

·Valve Position -a-
    
        The  valve  stems  of  both  the  wide  and  narrow 
tubes  are  turned  all  the  way  in.  The  unit  is 
shipped from the factory in this position.(Fig.41a)

·Valve Position -b-
        The  valve  stems  of  both  the  wide  and  narrow 
tubes  are  turned  all  the  way  out  (“ BACK  SEAT”  
position). This is the normal operating position. 
(Fig.41b)

·Valve position -c-
    With the narrow tube valve kept at BACK SEAT, 
only    the  wide  tube  valve  stem  is  turned  to  the 
halfway-down  position.  This  position  is  used  for 
pressure measurement and gas charging. (Fig.41c)

“Pump down” means collecting all refrigerant in 
the outdoor unit without loss of refrigerant gas.
Pump down is used when the unit is to be relocated 
or the refrigerant circuit is serviced.

(1) Connect a low-pressure gauge manifold hose to 

the charge port on the wide tube service valve.

(2) Lower the stem of the wide tube service valve 

to  position  -c-  and  purge  the  air  from  the 
manifold hose using the refrigerant gas.

(3) Turn the narrow tube service valve all the way 

in (position -a-).

,

(4) Turn on the unit s operating switch and start 

cooling operation.

(5)  When  the  low-pressure  gauge  reading  falls  to 

2

1to  0.5  kg/cm ,  fully  close  the  wide  tube  valve 
stem  (position  -a-),  and  then  quickly  turn  off 
the  unit  .  At  that  time,  pump  down  has  been 
completed and all refrigerant gas will have been 
collected in the outdoor unit .

Hex
wrench

Open

Close

Fig.41a   Condition at Shipping(-a-)

Valve cap

Stem

O-ring

Fig.41b   Condition for Operation(-b-)

Fig.41c    Condition at Gas Charging(-c-)