York R-410A Technical & Service Manual page 278

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Many factors limit the selection of air-outlet, for example:
Indoor fitment
Airflow in the room
Installation and connection type of the air-outlet
The following issues should be noted:
Try to assure the equality of the indoor parameters (especially the temperature)
Prevent short-circuit of the air-inlet and air-outlet
Prevent bolding cold air directly to people in summer
Air-inlet:
The air-inlet shouldn't be set at places where people stays long to prevent short-
circuit and open-circuit. If adopting side-sending, it is suitable to set at the same side of the air-
outlet.
For side air-inlet, normally, it is set under the same side. If adopting parallel air-
sending, the air-inlet also is set underside mostly. In order to avoid dust and filter, the height
from the underline of the air-inlet to the ground should at least keep 0.15m. For high big
workshops, it is suitable to add air-inlet or discharge air-let to discharge surplus-heat.
The distance from the air-inlet of the scatter setting to the wall should not less
than half of the space between scatter settings.
Fresh air-let:
Fresh air-let should be set at clean places and far away from discharge air-let.
Fresh air-let should be set upside the discharge air-let.
Fresh air-let should be set in the shade and avoid roof and west-wall. The
distance from the ground is at least 2m and 1m in case of green ground. And shutter is needed
under the air-let.
7.3.3 Facture and installation
7.3.3.1 Please use YDS inlet panel.
7.3.3.2 Set a static-pressure box in the outlet to eliminate some noise
7.3.3.3 Pay attention to the insulation of pipeline and the condensing water in the outlet.
7.3.3.4 The appearance of the air-outlet hasn't obvious impress, nick and spot. The color
should be consistent and welding points should be lubricous.
7.3.3.5 The match between inner sphere and outer sphere of spheroid air-outlet should
rotate freely and isn't flexible after orientation.
7.3.3.6 The diffusing loop and modulation loop of the scatter setting should be at the same
axis and space distributing in radial direction should be even.
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Installation