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Version 1 – GBR (25/10/2022)
D-502-0287
5.4.6.
Hidden Regulation Functions
-
The control behaviour includes automatic processes that ensure optimal operation of the unit with
emphasis on the maximum service life and efficiency of the operation. These processes are part of the
manufacturer's factory setup and know-how. The user cannot change them. As a result of these
automatic processes, the behaviour of the unit may be different from that assumed by the user.
-
These are mainly automatic processes:
o
unit preheating control – switches only when necessary,
o
anti-freeze logics triggering – measures against recuperator freezing,
o
minimum preheating, heating operation time – protective function,
o
cooling after switching off pre-heating, heating – protective against overheating of the exchanger
o
Unit control using AQS sensors - automatic functionality according to ventilation needs
5.4.7.
Automatic Unit Control using AQS Sensors
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AQS sensors for sensing the CO2 concentration in the room and RH humidity sensors can be connected
to the unit using accessories, see chapter 4.2.2.
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After connecting the AQS sensors to the unit, activate the automatic regime function - button 4.
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The unit responds by continually controlling the need for real-time ventilation triggered by sensors:
o
When the concentration of the monitored substances is reached, ventilation shall be switched
on with the minimum flow rate:
CO
2
– 800 ppm,
RH – 65%.
o
If the reduction of the concentration of the monitored substances in the room is not achieved,
the unit controller increases the flow up to the maximum flow value set by the user.
o
The unit controller will start to decrease the flow rate continuously again while reducing the
concentration.
o
The aim of the regulation – ventilation, is to find the ideal degree of ventilation (flow rate)
depending on the concentration of the monitored substance in the ventilation room. For this
reason, the unit may ventilate for a long time until it reaches safe limits of concentration or
complete ventilation of the substance being monitored.
o
When the concentration is reduced to a specified value, ventilation is switched off and the unit
is switched to the standby mode:
CO2 – 700 ppm,
RH – 60%.
o
If there is a requirement for ventilation from several sensors, the controller gives priority to a
sensor with a higher ventilation requirement.
5.5.
Customer Menu
5.5.1.
Service Menu Access
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The unit is connected to its power supply - the main switch is on (position I)
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The controller has been loaded - see chapter 5.2. – item 1)
-
The controller is switched off - if necessary, switch it off (the ON/OFF button must not be lit or flashing -
2.) - the unit is switched off by the controller
-
Press key 1. “reducing fan output level” for 6 s.
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After 6 s, the entire fan setting scale flashes once - you are in the customer menu.
Customer menu display
Service Menu Access
6 s
Fig. 43
