Unit installation

page 32
6.2 Installation of the Combined Outdoor Units (Suitable for Model of MDS260/280/300)
Two outdoor units can be grouped as one outdoor unit, to couple with multi-indoor units. Grouped outdoor
units installation is more complicated than that of the single outdoor unit; please read the below notes
carefully before installation.
Select the Position of the Installation for Outdoor Unit
Select one unit as the main unit, the other one as the slave unit; and two units shall be positioned in the same
level side by side.
• Main unit and slave unit shall be installed in the same level.
• The distance between main and slave unit shall be more than 10mm.
Piping Connection of the Outdoor Units
• Accessory copper parts are packed with the outdoor units; piping connection includes gas, liquid and
balance piping connection between the main and slave units. All piping shall be with insulation material
and avoid any damage of this insulation material.
Gas and Liquid Piping Connection
• Gas and liquid piping connection with the units, please refer to the concerned chapter of “installation of
refrigeration piping”.
• Gas and liquid piping shall be connected paralleled, shown as below. The dimensions of the straight pipe
connected to the Tri-joint must meet the requirements below.
Piping connection position
(Remove the panel before
piping connection)
Main and slave units must be
installed in the same level
B
φ28.6mm a transiton pipe
(only for φ34.9mm gas pipe)
Elbow
C
For φ28.6mm gas pipe,
directly connect to Tri-joint;
For φ34.9mm gas pipe, add a
reducer and a transition pip
e
D
B
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A >10mm
B >200mm
C >500mm
D>100mm
Tri-jiont