19
Ultra
1.54
Comfortable indoor climate in high-end interiors
Installation and operating instructions
10. Electrical wiring
10.1 Safety information
The electrical wiring of this products requires technical knowledge of
electrical engineering. This knowledge, generally learned in vocational
training in one of the fields stated, is not described separately here. Errors
with the wiring can lead to the unit being damaged! The manufacturer is
not liable for any damage to people and materials caused by the wrong
wiring and/or improper handling. Note the following safety information
before starting to work on the controller and on the Ultra:
• Regularly check the unit heater’s electrical equipment. Immediately
replace loose connections and faulty cables.
• Disconnect the system and ensure that it cannot be accidentally
reconnected.
• Only use the wiring diagrams enclosed to carry out the electrical
connection.
• Only wire the unit in accordance with currently applicable VDE and EN
guidelines, as well as Technical Wiring Regulations stipulated by the
regional energy supply companies.
• Only connect the unit to fixed wiring.
• The operator of the unit is responsible for the EMC conformity of the
entire system in accordance with the local applicable standards.
EC fan
Electrical loading (>50 C) between the mains conductor and protective
conductor after switching off the mains power supply when switching
several fans in parallel.
• Ensure that a contact safety device is fitted. The mains connections and
PE need to be shorted before working on the electrics.
The terminals and connectors are still energised even when the unit is
switched off. Check whether the terminals and connectors are de-energised
with a two-pin voltage tester.
• Only open the unit 5 minutes after all poles of the voltage have been
switched off.
The earth wire carries high leakage currents (depending on the frequency,
intermediate voltage and motor capacity). Therefore check EN-compliant
earthing under test conditions (EN 50 178, Art. 5.2.11). Hazardous voltage
can occur at the motor housing without earthing.
In the event of a fault, electrical voltage will occur at the rotor and impeller.
Rotor and impeller are base-insulated.
• Do not touch when fitted!
