Refrigerant Piping Length And Height Difference; Preparing Refrigerant Piping; Refrigerant Piping Requirements - Daikin R32 Series Installer's Reference Manual

5.2.3 Refrigerant piping length and height difference

5.3 Preparing refrigerant piping

5.3.1 Refrigerant piping requirements

3(A)MXM+3(A)MXF+4MXM+5MXM
R32 Split series
4P600463-1B – 2020.05
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
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
3MXM40, 3MXM52,
3AMXM52,
3MXM68, 3MXF52,
3AMXF52, 3MXF68
4MXM68
4MXM80
5MXM90
Outdoor unit installed
higher than indoor unit
Outdoor unit installed
lower than at least 1
indoor unit
INFORMATION
Also read the precautions and requirements in the "General safety precautions"
chapter.
▪ Piping material: Phosphoric acid deoxidised seamless copper.
▪ Piping diameter:
Minimum required space
≤25 m
Height difference
outdoor-indoor
≤15 m
≤7.5 m
5 Preparation
|
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
Installer reference guide
25