7.4 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: 26 l/s or 25 %.
• Nom: 44 l/s or 50 % (at approximately 80 Pa).
• High: 67 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 9.5) 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 9.5)
under functions.
7.4.1 Setting the airflow
1. Go to the service menu by using the SELECTION knob
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
%
5. Fan control by
Airflow
l/s.
When settings are done, press ENTER.
Choose
System curve
.
Fan control
Airflow
System curve
SF: 4
EF: 4
Airflow
l/s
EF
SF
Nom
44
44
High
67
67
6. Press RETURN once the system curves has been set and go to
Airflow l/s
or
m
3
/h
.
When settings are done, press ENTER.
Low
26
26
SAVE VTR 200/B
Installation and Service
208061
13
Systemair Sverige AB
