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8. Commissioning
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Electricity warning (hazardous voltage)!
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Failure to observe the hazard may result in death, injury or damage to property.
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Before performing any work on conductive parts, always disconnect the unit completely
from the electricity supply and make sure that it cannot be switched back on again.
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Never reach into the impeller or other rotating or moving parts.
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Failure to observe the hazard may lead to serious injury.
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Work may only be performed once the impeller has come to a complete halt.
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Caution! Burning hazard.
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Failure to observe the hazard may result in personal injury and/or damage to property.
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Do not touch the surface until the motor and heater have cooled.
Störung Gerät
If there is a unit malfunction, 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 thermostat is connected to the control system. When the temperature
undershoots the set-point, the dampers close, the circulation pump starts running and the heating
valve opens. If the set value is not reached after 20 minutes, the unit switches off completely and the
control unit indicates an error.
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 9.4. 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.
If the set value is reached, if the supply air temperature sinks below 16°C, the contact will be opened.
Control unit
The control unit is connected to the supply air unit‘s control system with a control cable.
A connector on the control cable is plugged directly into the socket on the control unit from beneath
(see Fig. 14). On the unit, the control cable is first fed through a cable gland (see Fig. 13), placed in
the cable duct and then connected to the RJ10 socket provided in the controller board. The control
cable must not be shortened. Any excess length must be stowed outside of the housing. If the cable
is too short, extensions can be ordered from the manufacturer or supplier. Alternatively, a 4-wire
data cable with 120 Ohm resistance can also be connected. This is fed through the back wall of the
control unit and connected to the spring-loaded terminals. In the unit, instead of being connected to
the controller board in the RJ10 socket, the cable is connected in the spring-loaded terminals next to
it (see wiring diagram).
Commissioning by trained technical personnel may only be performed after any risk has been ruled out.
The following checks should be performed in accordance with the installation and operating manual and
the regulations in force:
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Correctly sealed installation of the unit and duct system.
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Check the duct system, unit and medium lines, if present, remove any foreign bodies if necessary.
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The intake opening and inflow into the unit must be clear.
• Check all mechanical and electrical protection measures (e.g. earthing).
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Voltage, frequency and type of current must correspond with the rating plate.
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Check all electrical connections and wiring.
Summary of Contents for ETA K 1200 V W
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