15
Installation
preparations
4.2.2.1 Preparations for installing the wall mounting pipe
Prior to installing the ventilation unit, an appropriate wall mounting pipe must already be installed in the outside wall at the
designated installation location. It must be adjusted flush with the dimensions of the final wall structure.
The square wall mounting pipe, intended in particular for new buildings, should be integrated in the outside wall construction
in the course of constructing the outside wall. The round wall mounting pipe is to be inserted after drilling a core hole (
270 mm) into the drill hole of the outside wall.
NOTE
Installation of the ComfoAir 70 requires the use of the round or square wall mounting pipe.
Observe the respective enclosed instructions on professional installation when installing the wall mounting pipe.
Use the mounting template in order to transfer all centrings for the holes onto the inner wall surface.
4.2.2.2 Preparations for installing electrical connections
The mains cable for the power supply and, if necessary, the control cable for connecting an optional external control panel
must be inserted into the unit through the cut-out in the wall bracket. The cable ends should protrude approx. 10 cm from
the wall surface in the area of the cable entry point in order to establish secure clamp connections with the cables on the
unit side.
NOTE
For the power supply, a mains cable (recommended type NYM-J 3x1.5) for stationary units with disconnection with a
contact opening width corresponding to the conditions of overvoltage category III for full disconnection must be provided
on site.
For the connection of an optional, external control panel, a control cable (recommended type J-Y(ST)Y 2x2x0.6) must
be laid on site between the external control panel and the ventilation unit.
Connecting
ventilation
tubes
The ventilation unit has four ventilation tube connection options in the upper EPP housing section for direct ventilation of
a room network.
These openings for connecting ventilation tubes must be made on site if necessary when the unit is installed, since the
ComfoAir 70 is supplied as a single room ventilation unit in the standard version.
NOTE
The ventilation tubes can be installed either on the side and/or on the back of the unit.
It is not permissible to connect one ventilation tube of the same type to the side and one to the back of the connector.
Components and accessories from the Zehnder product portfolio are recommended as ventilation tube material.
The ventilation tubes in an adjoining room connection have an effect on the volume flow balance of the ventilation unit.
The customer service team is to use the programming module to balance the system according to the system
characteristics curve.
4.2.3.1 Back connection of the ventilation tube
To connect the ventilation tube to the back wall of the unit, remove the end caps from the upper EPP housing section.
Close the respective side connector with the removed end cap.
Содержание ComfoAir 70
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