SystemAir SAVE VTR 250/B Betriebs- Und Wartungsanleitung Seite 31

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7.7.6.4.1Finding RPM for desired airflow
It is necessary to set fan RPM (revolutions per minute) for each airflow level to control airflow by changing fan speed.
Fan speed differ for each household because of different unit size, duct system and system pressure. In order to find
correct fan speed, external tool must be used at Systemair website.
1. Go to Systemair website and find your unit.
2. Go to Diagram tab and type in desired airflow values in l/s, m
sure drop in duct system (if this value is not know, type in 100 Pa for both supply and extract air)
3. See calculated speed values in revolutions per minute (rpm) for both supply and extract air in the table bellow
diagrams.
4. Use this procedure to find fan speed for all airflow levels: MINIMUM LEVEL, LOW LEVEL, NORMAL LEVEL, HIGH LEV-
EL, MAXIMUM LEVEL.
5. Finally in the control panel go to Service menu, enter the password, then go to Control Regulation → Fan
Control. Choose RPM as airflow type and in sub-menu Airflow Level Settings enter calculated fan speed val-
ues for each level.
7.7.6.5 User Modes
Set airflow level, duration and offset for each user mode.
Set supply and extract air fan levels, default duration and temperature offset where available for user modes:
• Away
• Central Vacuum Cleaner
• Cooker Hood
• Crowded
• Fireplace
• Holiday
• Refresh
7.7.6.6 Communication
Configure Modbus and wireless settings
Modbus
• Set Modbus address. Default setting is 1.
• Set baud rate. Default setting is 115200.
• Set parity. Default setting is None. Range: None / Even / Odd.
• Set stop bits. Default setting is 1.
• Shows Smartly-Gateway state.
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3 /h, m
Fig. 4 Example of airflow and external pressure selection
Fig. 5 Example speed for supply and extract air
3 /s or cfm for supply and extract air. Input pres-
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