Skov DOL 539 - Emergency Control

84 User Manual
DOL 534 • DOL 539
Pressure alarms
In the function Sensor alarm delay, you can delay the alarm signal so that
the alarm is not generated due to short changes in the house pressure
level, e.g. when you open a house door.
The DOL 53X controller generates an alarm when the pressure in the
house drops below or exceeds the settings for Pressure low limit/ high
limit.
Heat recovery unit
The flap alarm for the heat recovery unit works in the same way as the
other flap alarms. See above.
DOL 53X can generate an alarm if the temperature sensor in the air inlet
is short-circuited or disconnected.
DOL 53X generates an alarm when the temperature in the air inlet is
below the set limit (-5 C).
Catching
Catching key error
Alarm that the catching is not completed within the set period.
5.4.1 Emergency Control
5.4.1.1 Emergency Opening
Emergency opening is a standard function in the DOL 53X controller, whether a proper emergency opening is
installed or not. As long as power is available, the controller will open the ventilation system 100% in case of a
relevant alarm – even when it is cold outside.
Emergency opening can be released by five types of alarm.
Emergency opening
Released by
High temperature
Always release
Abs. high temperature
Always release
Pressure high alarm
Always release
Power failure
Always release
Abs. high humidity
Connect or disconnect
Table 15: Release of emergency opening
It may be an advantage to disconnect absolute high humidity in houses situated in areas with very high outside
air humidity, and if a technical sensor error occurs.