Installation and service manual
Version 2.5
9
3.5 Duct connection
The duct connections are marked with descriptions of the four airflows for easy and unproblematic
connection.
Circular duct connections are supplied with rubber sealing gaskets, allowing connection of a duct direct on
the connecting piece of the unit. The Vent R/C 6 unit must be supplied with a duct transition piece on the
filter side, as the duct connection on this side of the unit is rectangular in order to provide the best possible
air distribution through the filter. Rectangular ducts can be used as an alternative.
For the sake of pressure drop and air velocity in the duct it is recommended that ducts have the same
dimensions as the connecting pieces of the unit. The dimensions of the connecting pieces are:
Vent R/C 2 Ø 315 mm
Vent R/C 4 Ø 400 mm
Vent R/C 6 Ø 500 mm
3.6 Condense drain Vent C
If the exhaust air from Vent C units with cross flow heat exchanger has a high relative humidity, condense
water may be created during the passage of the air through the heat exchanger. Therefore a condense tray is
fitted under the exhaust side of the heat exchanger for collection of condense water. The water tray has a 12-
mm drain pipe, which is located on the inspection side of the Vent C unit. A water trap must be fitted in the
drainpipe to allow the water to run off.