Gree GMV5E Series - Installation Space Requirement; Place Selection for Installing ODU

GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
27
mm, the thickness of insulation material should be at least 15 mm.
2.2.4 Communication cable and control cable
Note:
For air conditioning units installed in places with strong electromagnetic interference, shielded
wire must be used as the communication cables of the IDU and wired controller, and shielded twisted
pairs must be used as the communication cables between IDUs and between the IDU and ODU.
Communication cable selection for outdoor and IDUs
Material Type
Total Length L(m) of
Communication Cable
between IDU Unit and
IDU (ODU ) Unit
Wire size (mm
2
)
Material
Standard
Remarks
Light/Ordinary
polyvinyl chloride
sheathed cord.
(60227 IEC 52
/60227 IEC 53)
L≤1000
≥2×0.75
IEC
60227-5:2007
1. If the wire diameter is enlarged to
2×1 mm
2
, the total communication
length can reach 1500m.
2. The cord shall be Circular cord (the
cores shall be twisted together).
3. If unit is installed in places with
intense magnetic field or strong
interference, it is necessary to use
shielded wire.
Communication cable selection for IDU and wired controller
Material type
Total length of
communication line
between IDU unit and
wired controller L (m)
Wire size
(mm
2
)
Material
standard
Remarks
Light/Ordinary
polyvinyl chloride
sheathed cord.
(60227 IEC 52
/60227 IEC 53)
L≤250
2×0.75~2×1.25
IEC
60227-5:2007
1. Total length of communication line
can't exceed 250m.
2. The cord shall be Circular cord (the
cores shall be twisted together).
3. If unit is installed in places with
intense magnetic field or strong
interference, it is necessary to use
shielded wire.
2.2.5 Power cable
Only copper conductors can be used as power cables. The copper conductors must meet relevant
national standard and satisfy the carrying capacity of unit.
3 Installation Space Requirement
3.1 Place Selection for Installing ODU
The widely-used VRF units are applicable for various scenarios. In residential areas, especially in
rooms where elderly and infants live, a higher refrigerating performance and noise control is required.
Therefore, the ODU with excellent capacity and low noise is preferred; in addition, ODU should be
installed in outdoor spaces instead of in bedrooms, studies or meeting rooms. In commercial areas, ODU
should be installed far away from offices.