Duco System C series User Manual

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L1023004-D 14.07.2017
User manual Duco's ventilation systems
L1023004-D
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 CO2 at an appropriate level
Excessively high CO2 concentration is unhealthy and results in problems including lack of concentration and health is­sues such as headaches and lack of sleep at night. CO
2
accumulates particularly when many people gather in one room.
As standard, ventilation operates only until the CO
2
(standard) concentration has dropped below 800 ppm (parts per mil-
lion) and remains below that level. By way of comparison: the CO
2
level of the air outdoors is between 350 and 450 ppm.
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.
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Introduction
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L1023004-D – User manual for Duco's ventilation systems
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:
Central extract unit This unit extracts polluted air as required. E.g. a DucoBox.
Air duct network (not a Duco product) polluted air is extracted to the central extract unit via ventilation ducts to different rooms. Note: depending on the configuration of your system, not every room will be ventilated directly. Rooms in which there is no exhaust duct provided are ventilated via feed-through to other rooms. This can be done for instance with a window ventilator in internal doors or an air gap under them.
One or more sensors* CO
2
and/or humidity sensors monitor air quality and detect presence. Sensors can be incorporated in a User controller
in the room, or built into air ducts.
One or more User controllers For manual operation of the ventilation system.
Window ventilators Fresh air is supplied via window ventilators incorporated in windows, window frames, a sliding door or an outside wall. Your ventilation system may include manual and/or Tronic (= electronically controlled) window ventilators. Manual win­dow ventilators require to be opened and shut by the user. Tronic window ventilators are electronically controlled window ventilators which open and shut automatically as the system sees fit.
* Exception: Duco C System
You will need to leave manual window ventilators at least partially open in order to guarantee automatic system operation.
CENTRAL OR ZONAL EXHAUST?
With central exhaust (= non-local exhaust), ventilation is provided across the entire system. The ventilation system will therefore exhaust air from all rooms at all times, regardless of where the polluted air is detected or in which room the user has operated the system. The system therefore has just one zone.
With zonal exhaust (= local exhaust), the system only exhausts polluted air in the zone where it is required. Accordingly, a User controller will only control the relevant zone, unless the User controller is set to ‘master’ operation (= operating the entire system). A zone may consist of one or more rooms (e.g. living room + kitchen).
Note: some settings (see below in this manual) apply only to the room in which the user is located. In central-exhaust sys­tems, i.e. with just one zone, these settings apply to the whole system.
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L1023004-D – User manual for Duco's ventilation systems
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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.
AUTO
Automatic setting (= recommended)
The ventilation system is geared to obtaining good air quality automatically, based on CO2 and/or humidity readings. This is achieved as energy-efficiently as possible, by extracting polluted air only when necessary. In zonal ventilation systems, this occurs only where required. Ensure that manual window ventilators are open.
Low setting
The system exhausts at 10%* of maximum capacity. Tronic window ventilators will shut of their own accord.
Medium setting
The system exhausts at 50%* of maximum capacity. Ensure that manual window ventilators are open. Tronic window ventilators will open automatically to 50%.
High setting
The system exhausts at 100%* of maximum capacity. Ensure that manual window ventilators are open. Tronic window ventilators will open automatically to 100%.
* The stated percentages are standard and may differ in line with system settings.
The medium setting percentage can vary from one system to another. The ventilation system determines the optimum medium setting based on the type of home and the number of occupants configured by your installer.
The ventilation system is never shut down completely, there is always a minimum amount of ventilation. This is to prevent mould growth, among other things, in your home.
Nachtstand
If your ventilation system does not feature CO2 sensing in the bedroom(s) – via a sensor in a controller or in the ex­haust duct – then it is recommended that continuous medium setting (
) (= night setting) should be set on going to bed. At this setting, the system will ensure that proper air quality is maintained in the bedrooms. The automatic setting can be activated again on getting up.
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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).
Depending on the software version of the system and its components, some of the functions below may not be available.
OPERATION WITH LIGHTEMITTING BUTTONS OPERATION WITH LED IN THE CENTRE
Touch button / LED
AUTO
Push button
LED
AUTO
Wired power supply Battery powered
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