Daikin RZVF50 Installation Manual page 56

14.2 REFRIGERANT RECOVERY
[Working procedure]
1. Recovery retaining oil in existing gas pipe Approx. 1 min
Close gas stop valve (liquid stop valve: open)
and recovery refrigerant from gas stop valve port.(Fig.1)
2. Recovery retaining oil in existing liquid pipe Approx.1 min
Recovery refrigerant from liquid stop valve port.(Fig.2)
3.Recovery refrigerant in outdoor unit Approx. 2-3 min.
Recovery refrigerant from outdoor unit refrigerant recovery port * 1 . (Fig.3)
NOTE * 1 Can be omit this procedure if there has no refrigerant recovery port.
4.Recovery refrigerant in accordance with Fluorocarbons Recovery
and Destruction Law
If refrigerant recovery port *2 pressure became lower than gas stop valve
port pressure, refrigerant will recover at the simultaneous from the gas
stop valve port, open gas stop valve (Fig.3-G)) gradually to avoid from
pressure rising rapidly. (Fig.3- �)
NOTE*2 Recovery refrigerant from liquid valve port and stop valve port
simultaneous if there has no refrigerant recovery port.
Retaining oil recovery amount improved
approx. 5 times from regular refrigerant
recovery method
(pipe length, height difference, pipe path etc. is difference by installation condition)
ABOUT FLARE PROCESSING
• Flare connection area of existed piping will cause
processing deterioration, make sure to do newly
re-processing.
■ Flare processing
[Unit:mm]
{D=
( ____ R_E _FR _ I G _ E_R _A N _T_P_I P _ E_S_I Z _E _TA_B_L _ E _____ )
Outdoor Unit Existing pipe size
Standard pipe length
------------------------------ -----------
RZMFS0
9.5/15.9 Max pipe length
------------------------------ -----------
RZMF71
Chargeless length
RZMF90
Standard pipe length
------------------------------ -----------
RZMFl00
9.5/15.9 Max pipe length
------------------------------ -----------
RZMF125
RZMF140
Chargeless length
Refer to the installation manual for details other than those mentioned above table such as additional refrigerant charge amount.
■
Clean the existing pipe if it length is exceed 30 m.
■
Clean the existing pipe if chargeless length is exceed limit of existing pipe pump down refrigerant recovery.
■
Standard pipe (R32)
■
Pipe size (mm)
¢9.5
Thickness (mm)
t 0.8
I
Piping
A(+0,-0.4)
outside
For R32
diameter
¢9.5
13.2
19.7
¢ 15.9
Height
9.5/15.9
difference
7.Sm
30m Max 20 m
15m
7.Sm
50m Max 30 m
30m
¢ 15.9
t 1.0
Fi 9. I
n oor
=,
U n i t
=:7l
t::::
:::: :::::
Liq.
atop valve
I
@I!>
aa.s. pipe
Fi 9. 2
n oo r
i1
n·
-,
�==':::7
Liq,
stop valve
I
@I!>
Fi 9. 3
n oo r
u
n i
Liq,
stop valve
@I!>
• Please use flare nut which attached with product
(Do not use existed flare nut)
■ Flare nut
[Unit:mm]
Desi i n pressure
(Hig pressure)
4.17 MPa
56
Pressure guage
Ref. recovery
machine
Pressure guage
@I!>
Ref.
recovery
port
Ref. recovery
machine
Pressure guage
Ref, recover,
machine
Pipi �
B (+O ,-0.6)
outsi e
For R32
diameter
919.S
22
29
¢ 15.9
Tank
Tank
Tank