Condair DA 1400, Installation, Operation And Maintenance Manual

Page: 26 / 58

26 | Installation and Planning
2593630_A_EN_2003_DA_IOM
Condair DA
6.5.5 Connecting the Process Air Duct
Typical installations of the Condair DA Desiccant Dryer do not require a process air duct to the unit because the
unit is installed in the space needing dehumidification. Instead, air into the dehumidifier is taken from the space
directly.
Diameter of the Process Air Connection : 15.7 in (400 mm)
Considerations for the Process Air Connection:
l
Units installed in the dehumidified room should be installed with a protection net for the process
air inlet.
l
Use rivets or mounting screws to ensure that the duct connection is secure.
l
For units installed in a separate room, use a duct to supply the unit with process air. Follow local
guidelines.
Note: A damper may be installed in the process air duct to allow the correct commissioning of the dry
air volume.
6.5.6 Connecting the Reactivation Air Duct
Reactivation air enters the dehumidifier and passes through a heater. The air is heated and then passes through a
section of the rotor, where moisture from the Silica Gel is released into the air stream and removed from the
system. Because of the moisture content of the exiting reactivation air, condensation may form and should be
removed. Refer to
"Connecting the Wet Air Duct" below
.
Typical set-ups, where the Condair DA Desiccant Dryer is installed in the dehumidified room, do not require a
duct connection for the reactivation air. In these installations, the air is taken from the space. A coarse wire net is
recommended to filter out debris and other small objects from entering the unit.
Diameter of the Reactivation Air connection
: 7.9 in (200 mm)
Considerations for the reactivation air duct:
l
Ensure that the duct feeding the unit is as short as possible.
l
Use rivets or mounting screws to ensure that the duct connection is secure.
l
Ensure that a filter (coarse wire net) is used at the inlet to prevent foreign objects from entering
the dehumidifier and internal heater.
l
The duct may be sloped upwards. Prevent objects from falling into the duct.
l
Install a condensate drain at the exit.
6.5.7 Connecting the Wet Air Duct
Wet air leaving the Condair DA Desiccant Dryer comes from the reactivation air that has passed through the
internal heater and desiccant rotor.
IMPORTANT! The reactivation air leaving the desiccant rotor is hot and can reach temperatures of over
176 °F (80 °C).
Diameter of Wet Air Connection
: 7.9 in (200 mm)
Considerations for the wet air duct:
l
Wet air from the desiccant dryer should be exhausted to the outside.
l
A coarse wire net should be installed at the exhaust opening.
l
The duct should be as short as possible.