Daikin FDMA125AV16 Installation Manual page 40

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■
■
G)
REFRIGERANT RECOVERY )
[Working procedure]
1. Recovery retaining oil in existing 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 *
NOTE 1 Can be omit this procedure if there is no refrigerant recovery port
4. Recovery refrigerant in accordance with Fluorocarbons Recovery and
Destructive Law
If refrigerant recovery port *
port pressure, refrigerant will recover at the simultaneous from the gas
stop valve port, open gas stop valve (Fig.3-1 ) gradually to avoid from pressure
rising rapidly. (Fig.3-2 )
NOTE 1 Can be omit this procedure if there has no refrigerant recovery port
simultaneously 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 _IP_E_S_IZ_ E_ T_A _BL _ E __ _ )
Outdoor Unit
Standard pipe length
RZA24AVMK 9.5/15.9
RZA125AV16
RZA30AVMK
RZA140AV16
Chargeless pipe length
• Refer to the installation manual for details other than those mentioned above table such as additional refrigerant charge amount.
Clean the existing piping if it length is exceed 30m.
Clean the existing pipe if chargeless length is exceed limit of existing pipe pump down refrigerant recovery.
Standard pipe (R32)
Pipe size (mm)
r/i 9.5
Thickness (mm)
pressure become lower than gas stop valve
2
I
Piping
A(+0,-0.4)
outside
For R32
diameter
¢ 9.5
13.2
19.7
r/i
15.9
Existing pipe size
9.5/15.9
7.5m
50m
Max. pipe length
30m
r/i15.9
t 1.0
t 0.8
Fig, I
n oar
u
t:::: =ni::::::::71
.(Fig.3)
1
Fig, 2
n oo r
Uni
't::::::=::::':::7
Fi 9, 3
n oo r
Uni
• Please use flare nut which attached with product
(Do not use existed flare nut)
■ Flare nut
[Unit: mm]
Design pressure
Height
(High pressure)
difference
Max 30m 4.15 MPa
39
:e;,
Liq,
stop valve
I
®>
il
-,
Liq,
stop nlve
I
®>
Liq,
atop nlve
Piping
B (+O ,-0.6)
outside
For R32
diameter
\ll 9.5
22
29
r/i
15.9
Pressure guage
Ref. recovery Tank
llil.Chine
Tank
Ref. recovery
llil.Chlne
Presaure guage
Ref. recovery
Tank
lli!IChlne