This section describes the settings of the ventilation unit’s 24 V relay. Only one operating mode can be selected at a time.
To set the operating mode of the ventilation unit relay:
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Select Expert settings.
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The settings of the relay are described in the Relay settings area.
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Select the operating mode of the 24V ventilation unit relay. The options are:
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Service reminder — When the maintenance reminder of the unit is activated, the relay status will change. This change of status is visible e.g. in the house automation system.
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Error message — In the event of operational errors, the relay status will change automatically. This change of status is visible e.g. in the house automation system. The error is also recorded in the error log.
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Error message and service reminder — If the maintenance reminder of the unit is activated or an error occurs, the status of the relay changes. This change of status is visible e.g. in the house automation system. The maintenance reminder notifies the user of the service need once every four months (factory setting). See Maintenance.
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Emergency stop — If the emergency stop function of the unit is activated, the status of the relay changes. The emergency stop function is usually activated by an external signal via digital input. Information on activation of the emergency stop function can be transmitted to e.g. the house automation system.
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Bypass flap satus — The relay indicates the position of the bypass flap. The change in the damper position is visible e.g. in the house automation system. There are two positions:
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If the ends of the relay are open, the bypass flap is open and the air flow is directed past the heat recovery cell (known as the summer position).
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If the ends of the relay are closed, the bypass flap is closed and the air flow passes through the heat recovery cell (known as the winter position).
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Control of external liquid radiator — This setting is used in exceptional situations where a liquid radiator has been installed in the ventilation duct. The relay can be used to control devices relating to the use of the external liquid radiator, such as a pump and a magnetic valve.
Note
As the voltage of the relay is only 24V, information sent by the relay cannot be directly used to control the 230 VAC feed, but e.g. a contactor must be installed between the two.
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None— The relay control of the ventilation unit is turned off.
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The operating mode of the 24V relay of the ventilation unit is now set.