Refrigerant Piping Length And Height Difference - Daikin 3MXM40N2V1B9 Installer's Reference Manual

7 | Piping installation

7.1.3 Refrigerant piping length and height difference

Installer reference guide
34
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.
Model
2MXM68, 3MXM40, 3MXM52,
3AMXM52, 3MXF52, 3AMXF52
3MXM68, 3MXF68
4MXM68
4MXM80
5MXM90
Shortest allowable length per room is 3 m.
Outdoor unit Refrigerant piping length to
each indoor unit
2MXM68, 3MXM40,
3MXM52,
3AMXM52,
3MXM68, 3MXF52,
3AMXF52, 3MXF68,
4MXM68
4MXM80
5MXM90
INFORMATION
In case of combination of the outdoor unit 3MXM40N8 or 3MXM52N8 with the
indoor units CVXM-A and/or FVXM-A, the total liquid refrigerant piping length MUST
be ≤30 m.
Outdoor unit installed
higher than indoor unit
Outdoor unit installed
lower than at least 1
indoor unit
Minimum required space
≤25 m
Height difference
outdoor-indoor
≤15 m
≤7.5 m
2
4.7 m
2
5.5 m
2
6.5 m
2
9.8 m
2
10.4 m
Refrigerant piping total
length
≤50 m
≤60 m
≤70 m
≤75 m
Height difference indoor-
indoor
≤7.5 m
≤15 m
2MXM68+3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
4P600463-1D – 2021.03