Refrigerant Piping Length And Height Difference; Connecting The Refrigerant Piping; Connections Between Outdoor And Indoor Unit Using Reducers - Daikin 3AMXM52N2V1B9 Installation Manual
R32 split series
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Also See for 3AMXM52N2V1B9:
- Installer's reference manual (80 pages) ,
- Installation manual (28 pages) ,
- Installer's reference manual (84 pages)
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Pipe outer diameter
Insulation inner
(Ø
)
diameter (Ø
p
6.4 mm (1/4")
8~10 mm
9.5 mm (3/8")
12~15 mm
12.7 mm (1/2")
14~16 mm
Ø
Ø
i
i
Ø
Ø
p
p
t
If the temperature is higher than 30°C and the humidity is higher
than RH 80%, the thickness of the insulation materials should be at
least 20 mm to prevent condensation on the surface of the
insulation.
Use separate thermal insulation pipes for the gas and liquid
refrigerant piping.
5.1.3
Refrigerant piping length and height
difference
INFORMATION
For the Hybrid for Multi application and the DHW generator
for Multi, see the indoor unit installation manual for the
maximum allowable refrigerant piping length and height
difference.
The shorter the refrigerant piping, the better the performance of the
system.
The piping length and height differences must comply with the
following requirements.
Shortest allowable length per room is 3 m.
Refrigerant piping length to each
indoor unit
≤25 m
Height difference
outdoor-indoor
Outdoor unit installed
≤15 m
higher than indoor
unit
Outdoor unit installed
≤7.5 m
lower than at least 1
indoor unit
5.2
Connecting the refrigerant piping
DANGER: RISK OF BURNING/SCALDING
CAUTION
▪ No brazing or welding on site for units with R32
refrigerant charge during shipment.
▪ During installation of the refrigeration system, joining of
parts with at least one part charged shall be performed
taking into account the following requirements: inside
occupied spaces non-permanent joints are NOT
allowed for R32 refrigerant except for site made joints
directly connecting the indoor unit to piping. Site made
joints directly connecting piping to indoor units shall be
of non-permanent type.
CAUTION
Do NOT connect the embedded branch piping and the
outdoor unit when only carrying out piping work without
connecting the indoor unit in order to add another indoor
unit later.
3AMXF-A9, 3AMXF-A9, 3AMXM-N9
R32 Split series
3P600450-1R – 2022.05
Insulation thickness
)
(t)
i
≥10 mm
≥13 mm
≥13 mm
Refrigerant piping total
length
≤50 m
Height difference
indoor-indoor
≤7.5 m
≤15 m
5.2.1
Connections between outdoor and indoor
unit using reducers
INFORMATION
▪ For the DHW generator for Multi use the same reducer
as for the 20 class indoor unit.
▪ For the Hybrid for Multi, see the indoor unit installation
manual for the capacity class and applicable reducer.
Total indoor unit capacity class that can be connected to this
outdoor unit:
Total indoor unit capacity class that can be connected to this
outdoor unit
≤9.0 kW
Port
Class
3AMXM52
A (Ø9.5 mm)
15, 20, 25, 35, (42)
B + C (Ø12.7mm)
15, 20, 25, 35
42, 50
3MXF52, 3AMXF52, 3MXF68
A (Ø9.5 mm)
20, 25, 35
B + C (Ø12.7mm)
20, 25, 35
(a)
Only in case of connection with FTXM42R.
1
2
3
Reducer type
1
2
3
4
5
6
Connection examples:
▪ Connecting a Ø12.7 mm pipe to a Ø15.9 mm gas pipe connection
port
a
b
a
Outdoor unit connection port
b
Reducer no. 1
c
Reducer no. 3
d
Flare nut for Ø15.9 mm
e
Inter-unit piping
▪ Connecting a Ø9.5 mm pipe to a Ø15.9 mm gas pipe connection
port
a
b
a
Outdoor unit connection port
b
Reducer no. 6
c
Reducer no. 5
d
Flare nut for Ø9.5 mm
5 Piping installation
Reducer
(a)
—
2+4
—
—
2+4
4
5
6
Connection
Ø15.9 mm → Ø12.7 mm
Ø12.7 mm → Ø9.5 mm
Ø15.9 mm → Ø12.7 mm
Ø12.7 mm → Ø9.5 mm
Ø15.9 mm → Ø9.5 mm
Ø15.9 mm → Ø9.5 mm
c
d
e
c
d
e
Installation manual
11
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