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4 Instructions for skilled installers
4.1
Installations requirements
The following requirements must be met for the correct installation:
Installation in accordance with the general and locally-applicable safety and installation regulations from, among others, the
power authority, and in accordance with the regulations stipulated in this manual;
Outer wall with a final construction thickness of at least 11” (275 mm);
Sufficient clearance to objects and for maintenance work (at least 4” (10 cm) on each exhaust air side, 8” (20 cm) on the supply
air side, 31-1/2” (80 cm) at the front, and 8” (20 cm) above the unit), with regard to the housing surfaces when installed;
The recommended distance of the intake opening for the outdoor air with respect to the ground is > 39-1/2” (1 m). Ensure that
there is no polluted air in the vicinity of the intake area;
110 or 220 VAC, 50-60 Hz power supply.
4.1.1
Transport and packaging
Proceed with care when transporting and unpacking the ComfoAir 70. The ventilation unit and the outer panel are packed in a
transport-safe box.
Do not damage or dispose of the packaging before final installation of the ventilation unit.
4.1.2
Inspection of the delivered product
If the delivered product is damaged or something is missing, please contact the supplier immediately. Included in the delivery are:
ComfoAir 70, including installation kit
Exterior wall hood, including installation kit
Mounting template as an imprint on the inside of the lid of the box
Operating and installation instructions
Product labels for energy-efficiency label
For units where a second room connection is desired, you should refer to the accessories section in the Zehnder
product program when installing the air ducts.
4.2 Installation
4.2.1
General installation instructions
The ComfoAir 70 is designed for installation in a conditioned space and on a outer wall. The wall must be plumb and the unit must
be installed vertically with the display on the bottom. To mount the ventilation unit, a wall mounting pipe (available separately) must
be installed in the outer wall in advance; please refer to the respective installation instructions enclosed with the wall mounting pipe
(available separately).
When planning the installation location, please note that the minimum clearance needs to be 4” (10 cm) on the
exhaust air side and 8” (20 cm) on the supply air side. For maintenance work, minimal clearances of 31-1/2” (80
cm) in front of the unit and 8” (20 cm) above the unit are to be adhered to!
The location of the unit must meet all local and national code requirements. Ensure that proper clearance is
provided to other fixtures in bathrooms or other "wet" rooms.
4.2.2
Installation preparations
Prior to installing the ventilation unit, an appropriate wall mounting pipe (available separately) must already be installed in the outer
wall at the designated installation location, and flush with the finished wall construction.
The installation of the ComfoAir 70 is designed to be connected to a round wall mounting pipe (available
separately) or a square wall mounting pipe (available separately)!
The square wall mounting pipe (available separately), intended in particular for new buildings, should be integrated in the outer wall
during construction. The round wall mounting pipe (available separately) is preferably used in the refurbishment and reconstruction
of a building, and is inserted in the outer wall by means of a core hole Ø 10-5/8” (Ø 270 mm).
INSTRUCTIONS FOR SKILLED INSTALLERS
