IMO DVG30 03 2017 Am 10 05 2017

Electrical connection
10 DVG 30.03.2017
7 Electrical connection
The wiring diagram is placed inside the cover of service switch (also in the test protocol). At DVG-EC the wiring dia-
gram is placed in the connection box. The quality and installation of cables for electrical connection must ensure unin-
terrupted energy supply, even in case of fire. Inside fire zone use only certified cable. The electric cable must not be in
contact with or be fastened to the casing of the fan (F400 only, high temperature!). Connecting possibility see Appen-
dix 2. Electrical data on the fan nameplate must comply with the provided mains connection. Equivalent motors from
different suppliers may have slightly different nominal data than in catalogue.
NOTE (NOT APPLICABLE AT DVG-EC)
 Motors have serial built-in PTC. More than two PTC chains may not be switched in series, as this can
lead to undefined cut-outs.
 Maximum check voltage of PTC is 2,5 V.
 The wiring diagrams see Appendix 2.
 Motor protection must be provided by the installer.
NOTE (DVG-EC ONLY)
 The controller has built-in thermal protection.
 Observe attached detailed instructions of motor and controller supplier (1~ unit instruction for con-
troller “Compacto”, 3~ unit instruction for controller “Invento”).
 Power supply connection in the service switch, control cable in the connection box. Wiring diagrams and
descriptions in Appendix 3 (DVG-EC 1~) and Appendix 4 (DVG-EC 3~).
 Since EC motor built-in, there are warnings for remaining voltage after supply switched off.
 Type of permitted RCD protective devices observe local regulations.
WARNING
Hazard from electrical voltage!
 Electrical connection only by a trained electrician respectively trained and instructed qualified person-
nel!
 Electrical connection in accordance with the valid regulations.
 Prevent the ingress of water into the connection box.
 Observe 5 safety rules for the electrical expert!
- disconnect from the power supply (all-pole),
- prevent switching on again,
- test absence of voltage,
- earthing and short-circuiting,
- protect adjacent live parts by covers and barriers and fit a suitable warning notice.
Connect the cable according to wiring diagram.
Tighten the nuts of cable glands well to achieve IP68 protection.
Check, if the cover of service switch is uniformly fastened. If there is a danger of unintended switch off of the
service switch, it should be locked to guarantee operation in fire case (F400). Drill a hole into the handle in the
“on” position and provide with a padlock (not supplied with the fan). See Appendix 1.
Place the supply cable.
7.1 Residual current circuit breaker
Use universal RCDs type B or B+ in case of speed control with frequency converter.