VTR 100B LITE Installation and Service manual v2

Commissioning
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25
5.3.2 Flow settings exhaust air, G3/Coarse 50% type filter
Fig. 27 Exhaust air flow settings, G3/Coarse 50% type filter
5.4 Airflow settings
The airflow can be set by either l/s, m
3
/h or a percentage.
• If Airflow System curve is chosen, the settings will be in l/s, m
3
/h and system curves are selected.
• If Airflow % is chosen, the settings will be in percentage. System curves are not selectable.
The airflow may be adjusted in five steps; off, low, nominal, high and auto. These settings control the output signals to
the supply- and extract fans. The factory setting on each speed steps are:
• Off
• Low: 14 l/s or 33 %.
• Nom: 26 l/s or 66% (at approximately 80 Pa).
• High: 39 l/s or 100 %.
• Auto: In Auto mode the fans regulates in accordance with the pre-settings for the demand control.
These levels are possible to change in the service level. See service menu overview (chapter 8.5) under functions.
Warning
It is not recommended to activate manual fan stop (set fan to OFF) in standard households.If manual fan
stop is activated, the unit should be provided with dampers in exhaust and fresh air ducts to avoid cold
draught and risk of condensation when the unit has been stopped.
The fan can be set to OFF by activating manual fan stop. See service menu overview (chapter 8.5) under
functions.
5.4.1 Setting the airflow
1. Go to the service menu by using the SELECTION knob
Service
2. Enter the service level by typing the password, default 1111. Use the
SELECTION knob for each digit and confirm with the ENTER button after
each set digit and choose "NO" for the system not be locked.
Password
Password XXXX
Locked YES/NO
3. Go to: Functions
Choose: Fan control
Functions
—> Fan control
4. Turn the SELECTION knob to select the type of fan control you prefer,
System curve (l/s) or percentage (%)and press ENTER.
Fan control by Airflow %, see step 7.
Fan control
System curve
%
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