VTR 100B LITE Installation and Service manual v2

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Commissioning
6. Go back to the previous dialogue frame with the
RETURN button and go down to Airflow.
Week program
Airflow
7. Set which airflow the fan is supposed to be running in
the ON level, choose between Low, Nom, High or Auto.
Set which airflow the fan is supposed to be running in
the OFF level, choose between OFF, Low, Nom or High.
Note:
If an electrical re-heater battery is installed and
active and the unit is shut down from the control
panel, for example by choosing OFF. When the
unit is in OFF level in the week program, the fans
will continue to run for 3 minutes, to prevent the
heater from triggering the over heat protection
sensor, before they stop.
Airflow
On level: low/nom/high/auto
Off level: off/low/nom/high
8. Step back with the RETURN button until you reach the
main menu display
5.8 Ext/Force run
It is possible to program extended time you want the unit to work under operation conditions other than determined by
the week schedule.
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: Ext/Force Run
Service
Ext/Force Run
4. Set the time in minutes the unit is to run in extended/
forced running mode. Value range: 0–240 minutes, in
steps of 10 min.
Set the airflow for this mode. Choose between Low, Nom
or High.
Default value: Nom.
Ext/Force Run
Minutes: 0
Airflow: Nominal
5.9 Extra functions
The unit is equipped with a number of extra on/off functions which can be activated from external on/off switches that
can be connected to the digital inputs on the main print card (see wiring diagram).
The following possibilities are available:
• Digital inputs 1–3: Are free to be used for any purpose, they also have a different priority, DI 1 being the highest and
DI 3 the lowest. DI 1–3 have a higher priority than DI 5. By connecting on/off switches to these inputs it’s possible to
choose 4 (Off/Low/Normal/High) individual airflow settings in the control panel depending on a temporary need for
the building (for example lowering the extract air airflow when an open fire place is used). See chapter 8.5.
DI 3 is prepared and already connected internally for easy access on the unit. See chapter 6.3.
In units with a built-in bypass for cooker hood connection, DI 3 can be used to control external cooker hood. It has to
be configured as SF=High and EF=High.
• Digital input 4: Makes it possible to disable the electrical/other re-heater
Activated input means that the electrical/other re-heater is disabled.
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