McQuay MDS 30 Installation Manual page 13


Adjust the unit height to 35mm (for MCKD-A) or 30mm (for MCKD-C) between the indoor unit bottom surface
and the ceiling surface.

Confirm with a level gauge that the unit is installed horizontally.

Open the ceiling board along the outer edge of the installation template.

Drain pipe must be in downward gradient for smooth drainage to
prevent reversed water flow.

When connecting the drain pipe, be careful not to exert extra force
on the drain connector at indoor unit.

The outer diameter of the drain connection at the flexible drain hose
is 20mm.

Ensure to apply insulation (polyethylene foam with thickness more
than 8mm) on the drain piping to avoid the condensed water dripping
inside the room.

Connect the main drain pipe to the flexible drain hose.

Feed water from flexible drain hose to check the piping for leakage.
When the test is completed, connect the flexible drain hose to the drain
connector on the indoor unit.
Front panel installation

The front panel can only be fitted in one direction, following the piping direction. (Follow piping arrow sticker
on front panel).

Be sure to remove the installation template before installing the front panel.

Open the air intake grille by pulling back the catchers and removing it together with filter from panel.

Install the front frame panel onto the indoor unit by 4 screws and tighten it completely to prevent cool air
leakage.

Connect the LED wire and air swing wire to the indoor unit.

Install the front panel firmly to prevent cool air leakage which will cause condensation and water dripping.
Installation Manual IM-MDS_(i)
Drain pipe installation
Drainage leak test
drain & leakage test
fill water
flexible pipe
Wire connection between unit and panel
drain pipe
9