GREE Air-ccoled Closed Control Unit Service Manual
30
space for repairing, and also shall take the convenience of pipes connection between indoor
and outdoor units into account.
(3) The outdoor unit shall be installed and securely fixed in the stable and firm supporting
surface outside the building
(4) The outdoor unit and the indoor unit should be close to each other as much as possible
in order to reduce the length of cooling pipes and the quantity of elbows.
(5) Don’t install the outdoor unit under the window or between close buildings in order to
prevent the normal running noise from interior.
(6) Choose the airy place to install the unit and the distribution of air outlet and air inlet can
be unobstructed so that the unit can inhale and exhale enough non cyclical air.
(7) Don’t install the unit in the place with flammable and explosive Substance, as well as
polluted air, including intensive dust, salt mist, etc.
(8) Make sure that the ground is horizontal and the inclination pitch cannot be greater than
1°.
6.4.3
Requirements of Connection between Indoor units and Outdoor
Units
(1) The standard length of pipes connected outdoor units and indoor units is 10m. When
the length of the pipe is less than or equal to 10m, there is no need for extra refrigerants.
However, if it is over than 10m (Subject to the liquid pipe), the refrigerants and lubricant
should be added. The specific charge is as follows:
Item
Model
Charge volume(kg)
of refrigerants for
every 1 m longer of
connecting pipe
Charge volume
(kg)of lubricants for
every 10 m longer of
connecting pipe
Notes
JKFD5DXXX
0.054 0.1
Use R410A
refrigerant and
POE lubricant
JKFD7XXX
JKFD15XXX 0.11
0.2
JKFD20XXX 0.17
0.2
JKFD25XXX 0.11×2
0.2×2
JKFD40XXX 0.17×2
0.2×2
（
2
）
When the location of the outdoor unit is higher than that of the indoor unit, the altitude
intercept shall less than 30m while the location of the outdoor unit is lower than that of
the indoor unit, the altitude intercept shall less than 10m (try best to avoid such
situation which easily affects the cooling capacity of the unit). Total length of pipes
cannot exceed 30m. When the length of vertical gas pipes between indoor units and
outdoor units is greater than 10m, set a oil loop every 10m whose bending radius