l0Vacuumizing
1)
Thevacuumpumphasthevacuurndegreeoflessthan-0.lMPaandtheairdisplacementofmorethan40l/min.
2)
It is
unnecessary
to
vacuumize the
outdoor
unit. Don't
open the
check
valves
at the
gas
side and
the liquid
side
ofthe
outdoor
unit.
3) Makesurethevacuumpumpcandropupto-0.lMPawithin2hours;ifitfailstodropupto-0.lMpaafter3hours,checkmoistureorairleak.
4) The
vacuum pump
mirst
have
a check
valve.
Comect the
vacuum pump
Rutr
the vacuum pmp (above
2
hours)
After
dropping
up to
-0.
1 MPa, the vacum pMp
keeps
on ruming
for 20-60
minutes,
Remain
vacuum (above
lh)
4.1 I Refilling
volme
of refiigerant
The refilling
volume
ofrefrigerant (R4l0A)
is calculated
according to
the
diameter
and length
ofthe
pipe
at the
liquid
side ofthe
indoor
and outdoor
units.
Note:
The
R4 I 0A
refrigerant
must
be
weighed
by an
electronic
scale
and
filled in
the liquid
state.
4.12
Stop valve
instructions
I
)
It is
closed
when
leaving rhe
factory;
2)
Open the
valve
counterclockwise
or
clilsg
the
valve
clo-ckwise
with
a 6mm
socket
head
wrench:
3) After
completing
the
operation,
tighten
the valve
cover;'
4)
R4l0Aspecialtoolshallbeusedtovacuumizethevalveand_f,rlltherefrigerantattheserviceentrance.Filltherefrigerantattheserviceentranceatthe
'
gas
side,
and
vacuumize
the valve
at the
service entrance
at the liquid
sidE
and the
gas
side simultaneously.
Refilling refrigerml
Liquid
side
Fig.4-9
Stop
Valve
Instructions
l. Close
the valve
ofthe
piessue
gauge;
2.
Discomect
the
pressurc
gauge
md the
pmp;
3. Close the
vrcum pmp.
'
Don't
use tools
and
measuring
apparatus
using in
different
refrigerants
or directly
contacting
the
refrigerant.
.
Don't
exhaust
air with
refrigerant gas.
'Ifthevacuumdegreecannotreach-0.lMpa,recheckitsleakage,
Ifnot,keepthevacuumpumponforl-2h.
Table
4-l Refilling
Volume
of Refrigerant
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