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Joint alarm
It may be difficult to notice alarms if the unit is located in a place where access is difficult or infrequent, and if the control panel is locat-
ed in the same place.
An external alarm indicator in the form of an electric bulb or an acoustic signal can be connected to the ventilation unit and announce
when an alarm occurs. This could, for example, be when filters need replacing.
The Joint alarm is connected to the expansion PBC (accessory) via relay R10.
Joint alarm
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