VTS American VENTUS AVS 130 [13/36] Wiring diagrams

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OMM_HE_SEC_ver 1.7

5 Wiring diagrams

In this chapter, wiring diagrams for each heaters power will be presented, sorted depending on the type and size of the AHU. Pay attention to

the following markings:

Dashed line CONNECTIONS MADE BY THE USER

Solid line CONNECTIONS MADE BY THE MANUFACTURER

For some high power configurations it is required to use two 3x400V power cables, according to a given diagram - this is dictated by the smaller

cross-sections of the conductors and the reduction of the required bending radii thanks to this procedure.

For heaters with the capacity of 90kW and 108kW, factory-equipped with two sets of three B32 switches, connect the power cables to the

terminals of the central switches of each set!

Green percentages on the diagrams inform about the division of the heater power into the various stages of the heater activation.

For example:

This notation means that the smoothly regulated part of a given heater constitutes 25% of its power (0-10V DC). The second step – switched

on/off (ST2) is also 25%, while the third step – switched on/off (ST3) is 50% of the total power of the heater.

These parameters should be reflected in the appropriate uPC3 driver settings. The settings are made on the HMI Advanced screens:

-A05 for pre-heater

-A09 for main heater

-A06 for re-heater

If in a given system one or both stages switched on/off are not present (no ST2 / ST3 markings in the diagram), the value of 0% should be selected

in the controller settings in the appropriate position.