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English
Unit malfunction
If there is a malfunction on the unit, an error message appears on the display and at the same time
switches a relay. A closing and opening signal is available (see wiring diagram). Electrical connection
of the changeover contact with U - 230 VAC and Imax = 2A. (There is not any double insulation on the
mains cables).
Frost protection thermostat
An external frost protection temperature thermostat can be connected. As soon as the temperature
drops below the set value, the dampers are closed, the fans are switched off, the circulation pump
is switched on and the heating valve is opened. If the set value is not reached after 20 minutes, the
system switches off completely and the fault message F7 Frost protection appears on the control
panel. The circulation pump remains switched on and the heating valve opened. If the supply air
temperature rises again within 20 minutes, the device returns to normal operation.
External 0 - 10V input
An external measuring transducer can be connected to the 0 - 10V input for demand controlled ven
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tilation. Fan control according parameters in chapter 9.2. Commissioning level.
External pressure sensor
Two pressure sensors can be connected to the control unit for the operation with constant pressure
control. One sensor for extract air pressure, one sensor for supply air pressure.
Cooling system enable
A floating, normally open contact is provided to enable a cooling unit (see circuit diagram). If cooling
is required, the contact is closed. Electrical connection with Vmax=230 VAC and Imax=6.3 A. (there
is no double insulation from the mains). If cooling is required, the contact is closed. Electrical connec
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tion with Vmax=230 VAC and Imax=2 A. There is no double insulation from the mains.
Is the set value reached or the supply air temperature sinks below 16°C, the contact will be opened.
P 22
0 = Heating (Water)
0-10V (X15: 5,9) Parallel to the 3-point control heating
1 = Cooling (Water)
0-10V (X15: 5,9) Parallel to the 3-point control cooling
2 = Heating and cooling (Water)
0-10V (X15: 4,8) Parallel to the 3-point control heating
0-10V (X15: 5,9) Parallel to the 3-point control cooling
3 = Heating condenser and cooling DX-coil
If contact Enable Cooling opened, 0-10V heating (X15: 5,9)
If contact Enable Cooling closed, 0-10V cooling (X15: 5,9)
connected must be inherently safe and block-proof.
Electrical connection with Vmax =230 VAC and Imax=2 A.
Fire detector
An external, potential-free fire detection contact switches the device off. The display indicates “Error
fire protection”. This signals requires a manual reset.
Modbus RTU
The communication interface with Modbus RTU protocol is already integrated as standard. The cen
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tral building control system can be connected directly to the integrated interface via Modbus. Multiple
devices can be connected to the bus with an adapter board as accessory.
The unit can be visualized using the
ruck
view software software. All parameters, measured and set
values can be controlled by
ruck
view.
3-way valve heating
Temperature control for the optional warm water heating coil, e.g. active heating to cover the heating
demand by the ventilation system. Control output 3-position control Output 230V.
3-way valve cooling
Temperature control for the optional cold water cooling coil, e.g. active outdoor air cooling by the
ventilation system. Control output 3-position control Output 230V.
0-10V heating / 0-10V cooling
Control output for 3-point control or DX-coil.
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