Installation; Duct Connections - Trane CGCN Installation Operation & Maintenance

Installation

Duct connections

Duct connections of suction and discharge of the unit and accessories must be made of flexible hose. The duct
connection must be flexible enough to prevent transmitting vibrations to the tube network. On all units, a straight
duct section connected to a fan must have at least the same cross sectional area as the output panel orifice, and
its minimum length must be one and a half times the fan diameter, before any bend or deviation.
Horizontal or vertical air discharge
Duct for air
discharge
Vertical duct for
air discharge
For all units, insert a waterproof flexible joint to avoid any vibrations. The air intake of the coil and exhaust air fan
must be as short and straight as possible. The cross section area of the duct should be at least as large as the
group of intake and exhaust. There are installed grilles on external air intake. The discharge opening must always
be above the air intake, and should be at least oriented upward. When sizing ductwork the external static
pressure of the fans should be considered.
The flange which ensures the connection with the duct in the inlet and discharge air must be drilled to determine
the correct installation of the duct on the suction side to fix ducts to avoid vibrations. It is possible to drill flange to
ensure attachment and coupling ducts, as shown below.
Duct for
air inlet
Duct for
air inlet