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Modifications to the ventilation unit or the use of components that have not been approved or recommended by the 
manufacturer. 

 

Incorrect installation, improper use or contamination of the system. 

 

Original parts have been replaced by non-original parts.

 

 

Operation of the unit without filters and without a facade finish.

 

 Storage 

NOTE

 

Store the ventilation unit in its original packaging in a dry place at temperatures between 0°C and +40°C.

 

 

Environmentally friendly disposal 

NOTE

 

Packaging materials, consumables and waste equipment must be disposed of at the end of their useful life in accordance 
with the applicable regulations in your country.

 

Chapter for operators and qualified personnel 

 Product 

description 

The ComfoAir 70 is built to the current state of the art and the recognized safety regulations. The unit is subject to 
continuous improvement and development. This is why it is possible for your unit to deviate slightly from the description. 

  Unit design and function 

The ComfoAir 70 is a decentralised comfort ventilation unit, with heat and humidity recovery, using synchronous supply 
and extract air operation. The ventilation unit can be used both for individual room ventilation (room-by-room) and, via 
connection options for ventilation tubes, for venting of a group of rooms (utilisation unit). The ventilation unit is designed 
for permanent operation and is only to be taken out of operation for maintenance and repair work. With the appropriate 
(optional) sensor technology in the unit, fully automatic, demand-controlled ventilation operation is possible. 
The housing consists of a powder-coated steel plate, as well as covers made of aluminium in the RAL9016 colour scheme. 
The body of the unit, which is made of high-quality polypropylene (EPP), is used to house the main assemblies, provide 
thermal insulation and sound protection for the unit. 
The enthalpy exchanger used as standard in the unit ensures a healthy, comfortable indoor climate with its high heat and 
moisture recovery. 
Both of the maintenance-free centrifugal fans are driven by energy-efficient EC direct-current motors. The fan output in the 
form of the air volume flow can be adjusted in four stages. In the automatic operating mode, the air volume flow is 
continuously controlled. 
A fully automatic shutter control activates the motorised shutters as required for standby and frost protection mode.  
The ventilation unit requires very little maintenance, but it is important to change the air filter regularly. Inside the unit, there 
is a filter with filter class ISO coarse 70% for the outdoor air and another one for the extract air in serial production. 
Optionally, a filter of filter class ISO ePM10 80% can be used for filtering the outdoor air.

 

As a facade finish, an exterior wall panel is available in three different types of material: white aluminium, white ABS plastic, 
or stainless steel. 
 

Summary of Contents for ComfoAir 70

Page 1: ...Decorative Radiators Comfortable indoor ventilation Heating and cooling ceiling systems Clean air solutions User manual on operation and installation for operators and installers Zehnder ComfoAir 70...

Page 2: ...the property of Zehnder Group Publication as a whole or in parts requires the written approval of Zehnder Group In house duplication designated for the evaluation of the product or for proper use is p...

Page 3: ...ng functions and signals 7 Options for ventilation operation 10 External control panel 10 Operation via networking 10 Automatic operation via sensor module 10 Maintenance by the user 11 Filter mainten...

Page 4: ...ciently qualified for the respective work involved Qualification of target group 1 3 1 1 Users Users must be instructed by qualified personnel as follows Instruction in hazards when handling electrica...

Page 5: ...supply unless instructions to the contrary are listed in the manual Following installation all parts that could lead to personal injury are protected by the housing The unit cannot be opened without...

Page 6: ...acade finish Intended use also includes observing all instructions in the user manual In the event of improper use the Zehnder Group accepts no liability for any damage that may occur and no warranty...

Page 7: ...esigned for permanent operation and is only to be taken out of operation for maintenance and repair work With the appropriate optional sensor technology in the unit fully automatic demand controlled v...

Page 8: ...e Operating and display elements of the control panel The control panel has touch sensitive buttons and LED status indicators NOTE The ventilation unit can be operated at the same time with the intern...

Page 9: ...unit runs at the lowest ventilation level 15 m h This fan speed can be selected when away and for the purpose of moisture protection NOTE A cyclically limited reduced ventilation can be set with the A...

Page 10: ...rarily activated fan speed 4 can only be activated with a configured DIP switch setting After the boost ventilation time has elapsed the unit will be transferred to the most recently selected fan spee...

Page 11: ...ing of most recently active fan speed when supply air fan is switched off Display of LED1 3 as example Frost protection mode From an outside air temperature of 4 C the frost protection function is aut...

Page 12: ...l unit are possible Automatic operation via sensor module The application of the Automatic function follows the logic of a demand controlled system for optimizing the indoor air quality Consequently a...

Page 13: ...separately if needed in accordance with the humidity or air quality control The HUMIDITY sensor technology is primarily supposed to be installed in units for the ventilation of rooms with an increase...

Page 14: ...with the relevant filter maintenance LED signal 1 Put the unit into the Standby operating mode 2 Remove the upper design cover by pulling it out of the guides in an upwards direction 3 Use your finge...

Page 15: ...of the ventilation unit and the operating surface of the control panel which should be wiped down from time to time using a soft damp cloth never just wipe dry WARNING Risk due to electric shock Disco...

Page 16: ...mediately Included in the scope of delivery are ComfoAir 70 including installation kit Facade finish including installation set Mounting template as imprint on the inside of the lid of the box User ma...

Page 17: ...r 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 disconnect...

Page 18: ...g piece must protrude so far out of the wall so that the connector with the attached sealing tape is inserted in the EPP housing section 4 2 3 2 Side connection of the ventilation tube If the ventilat...

Page 19: ...wer supply before carrying out installation and maintenance work Proceed as follows for the installation of the unit NOTE Remove the transport lock attached to protect the lid mechanism Follow the ins...

Page 20: ...the wall bracket 6 Screw the wall bracket to the inner wall and take care to ensure that the mains supply line and if present the cable for the external control panel are located in the area of the ca...

Page 21: ...sertion of the ventilation unit it is recommended to wet the wall mounting pipe using silicone spray 10 Pivot the lower design cover against the EPP housing In the process press the lower design cover...

Page 22: ...the mains supply line and the power supply unit s primary side power cable into the connection socket DANGER Danger due to electric shock The wires for the mains supply line and the wires for the prim...

Page 23: ...the complete EPP housing of the ventilation unit into the wall mounting tube up to a distance of approx 15 cm from the wall bracket so that the control board is still freely accessible 6 Connect the...

Page 24: ...the exterior wall panel as a facade finish WARNING Danger due to falling exterior wall panel The exterior wall panel is to be fixed using the supplied mounting accessories or with mounting material s...

Page 25: ...ar contour of the airflow openings on the bottom cover NOTE To protect against water ingress apply a thick bead of suitable sealant e g weather resistant acrylic to the bottom cover depending on the s...

Page 26: ...d out at two yearly maintenance intervals NOTE Instructions for proper disinfection can be found at www core life In doing so proceed as follows 1 Disconnect the ComfoAir 70 from the supply voltage 2...

Page 27: ...esidual water can drain out of the openings 7 Following the inspection install all parts in the reverse order NOTE If necessary dismantled ventilation tubes must be reconnected in an air tight manner...

Page 28: ...ess min 275 mm to max 600 mm to 900 mm with extension set Mounting position In wall casing with supply and exhaust air openings at the top Operation data Fan speed Volume flow m h Thermal efficiency H...

Page 29: ...27 Dimensions with optional radio module 440 442 145 795 50 SUPPLY AIR EXTRACT AIR OUTDOOR AIR EXHAUST AIR 380 660 EXTRACT AIR SUPPLY AIR 376 Optional air tube connections on the back...

Page 30: ...28 Terminal scheme...

Page 31: ...ehnder Group Deutschland GmbH Almweg 34 77933 Lahr Deutschland T 49 7821 586 392 F 49 7821 586 406 sales international zehndergroup com www international zehnder systems com PDE Manual_CA70_V1 9_V0621...

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