Duct Construction; Optional Feature - Acson ART 55 A Technical Manual

2. Duct Construction.

(1) Series ART side flow units are equipped with horizontal supply
and return air openings. Duct connection to the unit should be made
with duct flanges and secured directly to the air openings with flexible
duct connectors to avoid normal noise transmission.
(2) For vertical air supply, a field supply plenum should be used. The
figure shows the recommended method for duct connection.
(3) To prevent air leakage, all duct seams should be taped. Duct
runs in air spaces that are not air-conditioned must be insulated and
provided with a vapor barrier.
Ducts exposed outdoors must be weather proofed. For quiet
operation, we recommend that the insulation on the supply duct be
placed inside, lining the duct.
(4) Where ducts from outdoors enter a building, the duct openings in
the building should be sealed with weather stripping to prevent rain,
dirt, sand, etc. from entering the building.
(5) Correctly sized filters must be fitted. There is no provision within
the unit for the placement of filter. However, the filters may be installed
in the return air chamber.
(6) Duct earth wiring must be connected. Please refer to the section
"Outlines and dimensions" for the correct position.
Optional Feature (Down Flow)*
Series ART down flow units are equipped with vertical supply and
return air openings. Duct connection to the unit should be made with
duct flanges to avoid normal noise transmission.
When connecting duct earth wiring for down flow configuration, we
must use accessory screw attached on the control box cover.
* Site modification required. Please refer to item 6:
OPTIONAL FEATURES for details.
Duct connection with
a vertical air plenum
at ART side flow unit
Duct connection with
a vertical air plenum
at ART side flow unit
ART side flow unit
Duct connection at
ART down flow unit
Duct connection at
ART down flow unit
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ART side flow unit
ART down flow unit
ART down flow unit