Preparation and installation of air duct
Precautions
When designing the air duct, please design the air channel according to the external static
•
pressure of the unit. The resistance of the air channel is equal to the static pressure; otherwise,
the air volume may be too large or small, resulting in failure of unit operation;
Make sure that the distance between the indoor return air opening and air inlet of the heat
•
exchanger is greater than or equal to 1 m;
Rational design of the air duct may eliminate noise effectively;
•
Make the external static pressure balanced with the duct resistance by changing the rotating
•
speed of the fan or regulating the resistance of the air duct (e.g., by adjusting the air-out speed of
the diffuser);
An insulating layer should be provided to reduce energy loss during transmission and separation
•
of condensate water;
The return air duct and air outlet duct should be fi xed to the precast slab of the fl oor with iron
•
stands, and all joints of the air duct should be sealed with sealant;
The distance between the wall and return air duct or air outlet duct is greater than or equal to
•
150 mm.
Installation of the return air duct
When bottom return air is selected, fold a piece of canvas duct purchased or self-made, use it
•
as the transition joint between the return air opening and return air grille, make free regulation
depending on the height of the indoor ceiling, and prevent vibration of the ceiling during
operation of the unit.
When bottom return air is selected, prepare the return air duct, connect its one end to the return
•
air opening of the indoor unit with rivets, and another end to the return air grille, as shown in
following fi gures
Rear return air:
Rear return air:
Return air duct
Air return plenum
Air return plenum
Return air grille
Canvas duct
Connected
by rivets
Canvas duc
Return air grille
Connected
by rivets
Unit Installation
12
AMS-SVX04A-EN
