Installation Of The Combined Outdoor Units - McQuay MDS080B R Installation Manual

Note：Outdoor unit transportation shall be very careful;
Do use special rope to tie the units for transportation;
Do not touch the fins of units to avoid hurt of hand;
Do keep the plastic bag from the child;
4.4 Outdoor unit Installation
● To use the solid base or supporter, considering the strength of the floor and drainage and piping layout;
● To screw bolt to fix the 4 corner of unit, to avoid the impact of strong wind and earthquake;
● To stop the vibration transfer, to take some measure to stop it , such as rubber and vibration absorber;
Warning： ： ： ：
● Installation ground and base shall be strong enough;

5 Installation of the combined outdoor units

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;
5.1 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 ;
5.2 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;
5.2.1 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;
Knock-out-hole
Piping connection position
To balance pipe
access valve
To units ball valve
Elbow
For φ 28.6mm gas pipe, directly
connect to Tri-joint; For φ 34.9mm
gas pipe, add a reducer and a
transition pipe
Access valve for
balance piping ( φ 9.52)
Main and slave units must be
installed in the same level
A
To units ball valve
Rubber absorber
Unit model
MDS080~150
Absorber quantity
4
Absorber SPEC
（ （ （ （ Suitable for Model of MDS260~320） ） ） ）
(liquid side)
Knock-out-hole
(for connecting balance pipe)
Ball valve (gas side)
A >10mm
B >200mm
C >500mm
D>100mm
Tri-jiont
φ 28.6mm a transiton pipe
(only for φ 34.9mm gas pipe)
MDS180~240 MDS260~320
6 8
280 × 180 × 15mm
Ball valve
Knock-out-hole
©2005 McQuay International
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