Indoor Unit Installation - McQuay MDS080B R Installation Manual

5.2.2 Balance piping connection
● Balance piping must be installed; balance piping shall be connected through the hole of side panel or base panel or the piping connection
position with the other outdoor unit;
● Balance piping shall be installed horizontally and orderly, and shall be lower than the access valve for balance piping;
● Protect the balance piping carefully and avoid touching any other parts, especially need to keep the piping from touching the wall of hole;
● Balance piping connection with the unit is shown in above drawing;
● Balance pipe should be vacuumed before open the access valve;
5.2.3 Insulation and Protection for connection piping
● All connection piping shall be well insulated;
All piping shall be well protected to avoid any bumping, trampling and rubbing with the surround when vibrating. Otherwise the piping may be
damaged, and affect the unit performance and safety, further more other safety problems may occur;

6 Indoor Unit Installation

6.1 To choose the position of installation
To follow up the below instructions:
● Ensure air flow everywhere of room;
● No barrier for air flow;
● Enough maintaining space for installation;
● Wall or ceiling shall be strong enough to support indoor units;
● Do not expose to sunshine place;
● Do not install units at oil and steam gas place;
● Do not install leakage and easy burning gas place;
● Do not install around the Hi frequency equipment place;
6.2 Installation of Indoor Unit
6.2.1 Installation of MCC-T series indoor units
This type indoor units shall couple with duct working of air supply and air return; also can add the heating coil and heater;
6.2.1.1 Indoor Unit
● To check the accessories are ready;
● To install the hooker and ensure it strong enough to support unit;
● Install the unit and check it installed horizontally; ensure the slope of the drainage
piping , as shown in the Fig.
Note ： a. Ensure piping and air duct working are most efficient length and units shall be
installed in the middle position of the room;
b. When installation of the indoor units, to ensure the distance shall be larger than 1 m between return air inlet and heat exchanger;
● To install the piping and drainage piping;
● Do not use the damaged copper tube or dirty copper tube; To avoid long time expose to the air ; Only get the concerned preparation ready,
to start the open valves, connector ,copper cup and cover etc;
● This series product need connect a MEX box out of the machine ,as shown in the figure:
The MEX box contain an electric-expanding valve in it. If the indoor unit is installed in the bedroom,
setting the MEX box out of the bedroom can efficient lower the noise of refrigerant flowing and expanding.
When install the MEX box, make sure the box vertical and set it fast. The distance between the MEX
box and indoor unit could not exceed the length-limit of the expanding valve cable. The cable has a plug
to connect the control box of the indoor unit.
There are some manners to install the MEX box:
SUSPENDING BY STEEVES
indoor
unit
steeve
nut
washer
hole for screw
washer
nut
©2005 McQuay International
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drain direction
screw joint
OUT
MEX box
IN
liquid pipe
gas pipe
washer
hook