Notes for electric installation on site
n
The fuse on the installation side must at least correspond to the max-
imum current consumption of the device (see type plate) and may not
exceed the value permitted for the mains plug.
n
Three-phase devices
Three-phase devices may only be operated on networks grounded
at the neutral point, e.g. TN-C, TN-C-S or TN-S. For ungrounded
networks (e.g. IT systems) or asymmetrically grounded networks, an
isolating transformer must be connected upstream and the neutral
point grounded. When selecting the isolating transformer, consider
the maximum connected loads of the device.
Ensure correct rotating field! If the rotating field is incorrect, an
error message is displayed and the device cannot be put into opera-
tion.
5.2 Switching on the device for the first time
You will find the entry sequence prescribed for safety reasons in the graphic.
The entries must be input each time the heat transfer liquid is changed and
after the device has been switched on for the first time.
Fig. 25: Asymmetrically grounded delta
network (without isolating transformer)
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Integral Process Thermostats and High-Temperature Thermostats
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