McQuay MDS030AR Applications Manual page 74

Design & installation Guide For McQuay MDS Multi System
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There are also the hole for fresh air and exhaust air for connection with outside in indoor unit, but
as for air piping, and only be the other side of refrigerant piping connector. If the indoor unit is
installed to the place with a barrier (such as a head lamp) or a small space, the connecting pipe
can improve air supply to two rooms at one time.
Return Air and Supply Air Direction
Drawings for piping connector and its dimension (unit: mm):
air outlet
Notes:
Do not close all air outlets of indoor unit in the using of the unit to avoid the frost of
evaporator.
To ensure the thickness of insulation material and no leakage allowed.
Fresh air shall be less than or equal to 20%.
Air tightness of outlet of supply air
Total 4 air outlets can be sealed by insulation material but more than 2 air outlets closed will
cause abnormal operation of units.
Open the front panel, to seal the air outlet in front panel.
To ensure the length of insulation material is the same length of the air outlet.
To extend the insulation material to cover the gas about 10mm but not touch the air grill;
there is no need to extend insulation material far more than 10 mm.
Installation of air inlet grill
Before installation of air inlet grill, to install the air filter.
To ensure the right side to face the grill.
Be careful to install the air filter in the frame of air filter supporter.
To fix the filter with the front panel.
The air inlet grill can be installed in any direction, depending on the
ceiling design.
To fix the grill and consider the service friendly to open the grill.
Installation of drainage
a. Slope is required as 1/100, and try to drain in a positive slope.
b. To use suspending bolt to fix the long drainage piping.
c. After installation, to run the leakage test is necessary to ensure it works.
d. Only in cooling mode, there is a need to detect the status of drainage.
supply air
return air
supply air
supply air
supply air
fresh air inlet
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