E/0204/39/63
19.8 EXTENSIBLE RECTANGULAR SECTION DUCT KIT FOR HORIZONTAL INDOOR UNIT
– DHINRECxx
This option is the connecting duct between the opening on the cabinet wall and the opening on the
evaporating unit for fresh air intake during free-cooling. The rear side of internal unit must be installed
with a minimum distance of 200 mm from cabinet wall, due to the position of the refrigerant
connections. This option or the following (DHINROxx) are the two alternatives to cover this minimum
distance, necessary for Split-Air units with free-cooling, when the unit is ceiling-mounted in an
horizontal position. Otherwise, the client must provide it.
This is a kit of two rectangular ducts (one inside the other) with a terminal flange (9 in the drawing)
for the fresh air intake opening of Split-Air units. They are made of zinc plate steel sheet painted
with plastic coating. This duct is extensible from a minimum of 200mm to a maximum of 270mm. If
a higher distance is required, the option DHINRO is the only suitable (see next paragraph).
Dimensions of the opening on the cabinet wall for fresh air intake are:
•
Width = 650 mm; Height = 220 mm for Split-Air CST40/50;
•
Width = 770 mm; Height = 270 mm for Split-Air CST60/80.
This opening shall be protected by a rain-proof grille, supplied as option (GRxxSOP) or provided
by the client.
Another opening is necessary for exhaust air discharge during free-cooling.
Minimum sections of this opening for exhaust air discharge are:
•
0.15 m
2
for Split-Air CST40/50;
•
0.24 m
2
for Split-Air CST60/80.
On this opening, an overpressure damper shall be installed to prevent cooled internal air to go out
from the opening when the unit works in cooling mode. In addition, another rain-proof grille shall be
installed. Both discharge grille and overpressure damper fixed to this grille are included in the
GRxxSOP option; otherwise they have to be provided by the client.
Dimensions of exhaust air discharge opening, to match the grille supplied with GRxxSOP option,
are:
•
Width = 500 mm; Height = 300 mm for Split-Air CST40/50;
•
Width = 800 mm; Height = 300 mm for Split-Air CST60/80.
