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• Digital input 5: Activate the Extended/forced running function with a impulse switch. The function overrides current
airflow settings and runs in forced mode according to the settings in Service -> Ext/Force run. Choose be-
tween Low, Nom and High for this function.
The input is calculated based on the signals from an impulse-switch. If a standard switch is used, the countdown of
the set time starts when the switch is switched off.
• Digital input 6: Control for the exchanger, used by the system
• Digital input 7: Home/leave, switching on this activates low energy support control. The heat exchanger is always
operating according to the setpoint value. Is there a re-heater activated it will operate according to the lowest set-
point value (12 °C). The function is used when the building is uninhabited for a longer period.
It is recommended to connect either of DI1, DI2 or DI3 in parallel with DI7. If DI7 is activated, set the fans speed to
min. Airflow settings are done when configuring DI1, DI2 or DI3.
See menu options in "Service menu Overview" (chapter 8.5).
6
Electrical connections
The VTR 100/B LITE is wired internally from factory.
The electrical connection box can be found on the supply
air outlet side of the unit. The print card can easily be tak-
en out from the unit, without using tools.
6.1
Print card layout
The VTR 100/B LITE is equipped with built-in regulation and internal wiring.
The figure shows the print card. See wiring diagram for more information.
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Fig. 28 Print card position
Electrical connections |
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