Helios AIR1 RH 1500 Notice De Montage Et D'utilisation page 144

Installation and Operating Instructions
EN
Central ventilation units AIR1 RH
4�2�2 Warm water heating register frost protection
The optional warm water heating register has frost protection with the following functionality:
100 %
15 C
O
50 %
7 C
O
0 %
Activation of frost protection:
• Below +15 °C: The valve is opened by the frost protection sensor signal; the pump cycle is started.
• Below +7 °C: Ventilation is deactivated, the external dampers close and the valve is completely opened.
Deactivation of frost protection:
• Frost protection sensor temperature above +15 °C
4�2�3 Filter monitoring
The dynamic filter monitoring is used to check the filter condition. This highest possible filter pressure loss is calculated
in relation to the selected filter type and the operating point. If the filter pressure loss is greater than the permitted pres-
sure loss at this operating point, the filter alarm will be triggered.
4�3 Priorities
If multiple ventilation modes are active at the same time, the ventilation unit will run at the respective ventilation stage
with the highest priority. This means that the external switch contact overrides all other ventilation stages.
Priority list (highest priority first):
• External switch contact
• Fire/emergency contact
• Manual operation with HMI or use of building control system (Bacnet, Modbus)
• External switch contact Boost
• External switch contact Normal
• External switch contact Reduced
• External switch contact Recirculation
• Timer Boost
• Timer Normal or Timer VOD with higher ventilation requirement
• Timer Reduced or Timer VOD with higher ventilation requirement
• Timer Recirculation or Timer VOD
• Free cooling (night cooling)
4�4 User levels/Access rights
Depending on the selected operating level, different functions/menus are active via the controller.
The following user levels are available:
• No rights
• User (password: 3333)
• Service (password: 2222)
• Admin (password: 1111)
The user levels can be modified in the "Access rights" menu. All user levels will automatically reset to "No rights" after a
pre-set time of 5 minutes from the last press of a button.
All passwords can be modified in the "Access rights" menu under "Change password".
If the Admin password was modified and then forgotten, a temporary master password can be requested from Helios
(Helios customer services).
Frost protection sensor temp.
Temperatur Frostschutzsensor
Frost protection sensor temp.
61
Fig� 33
Heating valve signal
Signal Heizventil