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UAB KOMFOVENT we reserve the right to make changes without prior notice
VERSO PRO2_guide_20-07
EN
3.3. Additional zone control (ZN)
This function allows controlling up to three different temperature zones with one air handling unit. Temperature of the
main zone is maintained by integrated heaters/coolers. Temperature in other zones is maintained by connected additional
zone modules, which are used to control duct-mounted heating/cooling devices. Every additional temperature zone will
also have a separate temperature sensor and a separate setting for the desired temperature that the user will be able to set
with the control panel.
An additional zone module may also control heaters/coolers installed in the same supply air flow, when more heating/
cooling power stages are required or a pre-heater is connected upstream the air handling unit.
For more information about this function and connection of heating/cooling devices see “Additional zone control C5”
Instruction Manual.
For information on how to activate this function and set a desired temperature value see Chapter “Control and Settings”.
3.4. Multi-level frost prevention
When ordering an air handling unit with a counter-flow heat exchanger (CF), you may additionally select a multi-level
antifreeze protection function. If this function is ordered, the heat exchanger is fitted with a four-segment damper. If there is
a risk of freezing, damper segments close/open in turns, thus preventing the heat exchanger from freezing.
For more information about this function see in “Multi-Level frost prevention” Instruction Manual.
The function is only activated at the factory and cannot be added to the air handling unit later.
3.5. Combined water heater/cooler
It is possible to use only one water heater and one piping unit (mixing valve, valve actuator, circulation pump) both for
heating and cooling. For the function to work properly, an additional external signal (e.g., from a thermostat) is required to
switch between heating and cooling modes (see “Installation Manual”).
This feature is pre-ordered and configured at the factory. Later, settings of this function may only be changed by a service
representative.
3.6. Control of direct evaporation (DX) devices
When the unit is ordered with an additional direct evaporation (DX) coil, a feature for controlling an external DX unit is
enabled. There are several different ways to control the DX unit:
• Modulated control – DX device is controlled by 0..10 V signal.
• Stepping control – START/STOP type DX devices are used.
This feature is pre-ordered and configured at the factory. Later, settings of this function may only be changed by a service
representative.
