GREE DC Inverter Multi VRF System II Service Manual
64
Communication cable selection for IDU and wired controller
Wire Type
Total Length of
Communication Cables
of the IDU and Wired
Controller L(m)
Number of Wire Pieces
x Wire Diameter (mm
2
)
Wire Standard
Remark
Common sheath
twisted pair copper
core (RVV)
L
İ
250
ı
2×0.75
GB/T 5023.3-
The overall
communication length
cannot exceed 250 m.
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.
2.6 Hanger rod and support
a. Hanger rod: M8 or M10;
b. U-steel: 14# or above;
c. Angle steel: 30mm×30mm×3mm or above;
d. Round steel: Ф10mm or above
3 Installation of outdoor unit
3.1 Check before installation
a. Before installation, please check the power cord if it complies with the power supply requirement on
the nameplate. Make sure the power supply is safe.
b. This air conditioner must be properly grounded through the receptacle to avoid electric shock. The
ground wire shouldn’t be connected with gas pipe, water pipe, lightning arrester or telephone line.
c. Maintain good air circulation to avoid lacking oxygen.
d. Read this manual carefully before installation.
3.2 Selection of installation site
a. Select a location which is strong enough to hold unit’s weight so that unit can stand still and erect.
b. Make sure the unit is not exposed to sun and rain. And the location can resist dust, typhoon and
earthquake.
c. Please keep the unit away from inflammable, explosive and corrosive gas or waste gas.
d. Make sure the location has space for heat exchange and maintenance so that unit can operate
reliably with good ventilation.
e. ODU and IDU should stay as close as possible to shorten the length of refrigerant pipe and reduce
bend angles.
f. Select a location which is out of children’s reach. Keep the unit away from children.
3.3 Carrying and installing outdoor unit
When carrying the outdoor unit, hang the unit in four directions with two sufficient ropes. In order to
avoid excursion from the center, the angel of ropes must be smaller than 40º during hanging and
moving.
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