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Duco System C series User Manual

Demand-controlled natural ventilation system; dcnvs

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L1023004-D
User manual
Duco's ventilation systems
1
Introduction
1A. Ventilation system operation
A Duco Demand-Controlled Natural Ventilation System (DCNVS) is a ventilation system that provides healthy air quality
automatically*. Sensor readings ensure that the building is ventilated only when it is required (= demand controlled). This
ventilation system operates on the system C principle, which means that polluted air is extracted mechanically (using a
central extract unit) and fresh air is supplied naturally via window ventilators.
Depending on the components installed, your ventilation system will:
→ Maintain CO
at an appropriate level
2
Excessively high CO
sues such as headaches and lack of sleep at night. CO
As standard, ventilation operates only until the CO
lion) and remains below that level. By way of comparison: the CO
→ Maintain humidity at an appropriate level
Excessively high humidity can lead to moisture accumulation or mould growth and health issues such as eye, nose, and
respiratory tract problems. The ventilation system is geared (as standard) to 60% relative humidity, the optimum.
→ Exhaust unpleasant odours
Using presence detection in a toilet for instance, the ventilation system ensures that rooms smell fresh by exhausting
polluted air.
Summing up, your Duco ventilation system ensures a healthy as well as comfortable indoor climate.
* Exception: Duco C System
Duco C System
All Duco Demand-Controlled Natural Ventilation Systems feature an automatic setting which is controlled by one
or more sensors. A Duco C System does not include any sensors and hence no automatic setting, which means
the system requires wholly manual operation.
L1023004-D 14.07.2017
concentration is unhealthy and results in problems including lack of concentration and health is-
2
accumulates particularly when many people gather in one room.
2
(standard) concentration has dropped below 800 ppm (parts per mil-
2
level of the air outdoors is between 350 and 450 ppm.
2
1

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Summary of Contents for Duco System C series

  • Page 1 All Duco Demand-Controlled Natural Ventilation Systems feature an automatic setting which is controlled by one or more sensors. A Duco C System does not include any sensors and hence no automatic setting, which means the system requires wholly manual operation.
  • Page 2 1B. Which system do I have? The capabilities of your ventilation system will depend on the configuration of the system. Please contact your Duco installer if you don’t know which ventilation system you have. A Duco Demand-Controlled Natural Ventilation System consists of the following: •...
  • Page 3: Operation

    L1023004-D User manual for Duco's ventilation systems – Operation 2A. Settings Your ventilation system includes four settings: one automatic and three manual settings. The next chapter describes the possibilities for activating these settings. Automatic setting (= recommended) AUTO The ventilation system is geared to obtaining good air quality automatically, based on CO and/or humidity readings.
  • Page 4 L1023004-D User manual for Duco's ventilation systems – 2B. Operation with Duco's User controller The operation of the system is dependent on the type of User controller: wired power supply (4 TOUCH buttons / LEDs) or battery power (4 PUSHbuttons + 1 LED).
  • Page 5 These settings are permanent in a Duco C system. In view of the fact that a Duco C system does not have an automatic mode available, the ‘AUTO’ button has the following function: Press the button 1, 2 or 3 times to put the system in a temporary high setting for 15, 30 or 45 minutes* respectively.
  • Page 6 L1023004-D User manual for Duco's ventilation systems – Permanent manual setting A permanent setting is activated for the zone in which the user is located. This setting remains active until the user deacti- vates it again. Note: in a non-zonal system, the permanent setting applies to the whole system.
  • Page 7 L1023004-D User manual for Duco's ventilation systems – Unoccupied setting The unoccupied setting puts the whole system in the most energy-saving setting. This setting is suitable for when you are on holiday, for example. The unoccupied setting remains active until the user deactivates it again.
  • Page 8: Position Switch

    3-position switch If, in addition to one or more of Duco's User controllers, your ventilation system is also equipped with a 3-position switch (through Perilex) the last operation on any controller will always take precedence. The ventilation position on the 3-position switch can therefore be overruled by another User controller, such that an incorrect ventilation position will be visible on the 3-position switch.
  • Page 9: Led Indications

    L1023004-D User manual for Duco's ventilation systems – LED indications 3A. Meaning of LED colours The LEDs on a User controller with a wired power supply indicate the active setting or status of the system. There is no indication of status on a battery-powered controller.
  • Page 10: Maintenance

    4A. General A ventilation system must be maintained in order to maintain proper operation. Refer to the document Onderhoudsinstructies Duco Ventilatiesystemen (L8000013) on www.duco.eu for detailed instructions. 4B. Battery-powered controller The battery in a battery-powered controller lasts 3 to 5 years in normal use. Battery type: CR2430 – 3 V Unscrew the controller from the wall and rotate the cover on the back to open it in order to replace the battery.
  • Page 11 I can’t hear the ventilation system, is it actually working? Duco’s ventilation systems are whisper-quiet. You can check whether the system is working by switching the system (tem- porarily) to the high setting and feeling an exhaust vent.