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2 Introduction and safety
The ComfoAir 70 is built in accordance with current technological standards and accepted safety regulations. The unit is subject to
continuing improvement and development. And therefore, is it possible for your unit to deviate slightly from the descriptions in this
document.
2.1
Proper use
2.1.1.1 ComfoAir 70 ventilation unit
The ComfoAir 70 can be used for controlled ventilation in living and office areas (with limitations in the commercial sector) at a
normal room air humidity of approximately 40-70% relative humidity; briefly up to approximately 80% relative humidity. Conditions
outside of this range are considered as misuse. Extreme conditions (e.g. salty air or air polluted with chlorine) can damage the
unit. For reasons of safety, it is prohibited to modify the product or to install components that are not explicitly recommended or
distributed by Zehnder North America for this product.
2.1.1.2 Control panels
The ventilation unit is equipped with an internal control panel. As an option, an external control panel can be connected to the unit
using a cable with maximum 80 ft. (25 m) in length. The external control panel is only suitable for use in indoor areas.
2.2 Safety
Failure to observe the safety regulations, installation conditions, instructions, warnings, and comments in this document can result
in personal injury and/or damage to the unit.
2.2.1
Safety regulations
Do not make any changes to the unit or to the specifications listed in this document. Such changes can cause personal injury
and/or lead to reduced performance in the ventilation system.
Always comply with the general locally-applicable building, safety and installation regulations of the relevant local authorities,
the regulations of the water utilities and power companies, and all other official regulations.
Installation, commissioning, and maintenance must be carried out by an authorized person or company, unless otherwise
stated in this document.
Always disconnect the unit from the power supply before performing repair or maintenance on the ventilation system.
Following installation, all parts that could lead to personal injury are safely shielded by the housing. The unit cannot be opened
without the use of a tool.
Do not disconnect the unit from the power supply unless instructions to the contrary are listed in the manual.
The electronics can be damaged by static electricity; which is why you must always take measures to prevent electrostatic
discharge when handling or connected to the electronics (e.g. anti-static wrist strap).
Replace the filters (at least) every six months. This ensures a pleasant and healthy air quality, and the unit will be protected
against contamination.
Only operate the unit with a closed housing.
Keep this document in the vicinity of the unit during the life of the ventilation unit.
2.2.2
Installation conditions
Check that the installation area is protected from freezing.
The acceptable temperature range for the air being moved is between -4°F (-20°C) and 104°F (40°C).
The unit must not be installed in rooms subject to explosion hazards.
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.
The unit must not be used for removal of combustible or explosive gases.
The unit can be connected to a 110 or 220 VAC / 50-60 Hz power supply.
To shut down from the main power supply, a disconnection (e.g. breaker or disconnect) system using a contact opening width
in accordance with the conditions for over-voltage category III for complete disconnection, must be provided.
Check whether the electrical installation is suitable for the maximum power of the unit. The values for the electrical input power
can be found in the “Product data sheet” chapter.
Check that the installation area of the unit meets the requirements in the “General installation instructions” chapter.
INTRODUCTION AND SAFETY
