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11.2. Stop sequence
The control unit shuts down according to the following procedure:
■
Deactivation of the alarm management function
■
Shut-down of the electric heater (PREMIUM BE or INFINITE BE versions).
■
Shut-down of the fans after a certain period, which is individually defined for each fan:
- VAS delay: 180s
- VAR delay: 300s
■
Closure of the fresh air and extracted air dampers.
■
The signals to the actuators are set to zero.
The installation stops when one of the following conditions is met:
■
No active time programme and no external forced operation (DI or BMS)
■
Activation of the external stop command (DI)
■
The system is shut down manually via the controller (manual shut-down)
■
Appearance of an alarm configured to stop the control panel.
12. Start / Stop of the unit
The Zehnder Eversky is delivered as standard in Auto mode, i.e. the ventilation is controlled by the time programme or, if
necessary, by an external forced operation. As soon as the unit is powered up, the switch on the front panel is in the ON
position, and the starting conditions are met, the machine starts automatically. If you want to stop the fan unit, the
Operating mode parameter must be changed from Auto to Manual stop.
Minimum access level: User
Access path:
Operating mode
Temperature control
Ventilation control
Time settings
Operating mode
Current configuration
Alarm history
Inputs / Outputs
Operating mode:
Auto
For any maintenance operation or when you wish to work inside the unit, it is advisable to cut off the power supply by
means of the isolating switch on the front panel after having switched the unit to manual stop mode and after having
waited until the fans come to a complete stop (post-ventilation sequence). The main page of the HMI command shows
"Ventilation stop" then "Stop", meaning total stop.
13. Starting up the unit
When starting up, the particular actions to be carried out are:
■
Check the date and time setting of the controller and adjust if necessary
■
Set the time programme
■
Set the ventilation setpoints
■
Set the temperature setpoints
■
Set the communication protocol (if communication is used)
■
Set specific functions (fire protection) if used
Zehnder Eversky
