Ballu KFR-28GW/BP Series, Service Manual

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E VACUATION PROCEDURES
C onnect the refrigerant pipes (both the liquid and gas
pipes ) between the indoor and the outdoor units.
R emove the se rvice port cap of the stop valve on the sid e o f the
o ut doo r unit ga s pipe . (The s to p va lv e w ill no t wo r k in i t s initia l
s tate fres h out of the factory (totally close d with cap on).
C onnect the gage manifold valve and the va cuum pump to the se rvice port o f the stop valve on the ga s pipe
s ide of the outdoor unit.
R u n th e v a c uum pum p fo r m o r e th a n 1 5 m in u te s a nd a t th is t m i e co n f irm th a t th e p r e s s u re g a g e in d ic a t e s
-0 .1 M p a (-7 6 cmH g ).
C heck the vacuum with the ga ge manifold valve, then close the gage manifold valve, and stop the
vacuum pump.
L ea ve it as is for one or two minutes .Make sure the pointer of the gage ma nifold valve rema ins in the.
sa me pos ition.
C los e
O pen
H exagonal w rench
S top valve
p ipe
C onnection
G age manifold valve
S top valve
Liquid pipe
S top valve
H exagonal
w rench
G as pipe
C aps
S ervice port
V acuum pump
R emove the gag e manifold valve qu ickly from the service port of the sto p valve.
A fte r re frig e ra n t p ip e s a re c o nn e c te d a n d e v a cu a te d , fu lly op e n a ll s to p va lv e s
on gas and liquid pipe s ides.
Operating without fully opening lowers the performance and ca use s trouble.
Pipe length
7m maximum
No gas charge is
n e e de d .
P ipe le ng th
excee ding 7m
Charge the pre scribed
amount of gas.
T ighten the ca p to the service port to obtain the initial status.
R e tighte n the ca p.
L e a k te s t
5.REFRIGERANT SYSTEM DIAGRAM
24