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Operation and Maintenance
Envistar Top 04-21
DSET.220501.07.en
Continuous product development may give rise to specification changes without notice.
4 Wiring instructions and fuse protection
4.1 MX - Complete control equipment
UC - Complete electrical connection to terminal without controller
unit
• Code MX - unit supplied with process unit Siemens Climatix, fully connected
and with complete integrated control equipment.
• Code UC - units supplied without controller unit but with sensor and damper
actuator connected electrically to the terminal. Fans and heat exchangers
are fused and connected electrically to the terminal. The terminal connec-
tions are positioned at a shared place in the unit. For further connection to
an external process unit, we recommend using a multi-conductor cable.
Safety switch
A safety switch must be fitted and wired on each power supply.
Wiring diagrams
For wiring diagrams for units with control equipment, see the order-unique wiring
diagram supplied with the unit at
(Control Diagram).
Unit functions, power supply and fuse protection
For recommended fuses, refer to Order Unique Documentation at
(Technical Data and Control Diagram), or the product
program IV Produkt Designer.
• The unit has a shared power supply for all unit functions as standard, but
can be ordered with separate power supplies on special order.
• Electric heaters (air heater electric) have a power supply 3x400 V as stan-
dard.
A special coil or a transformer is required for a 230 V power supply.
• Fuses with type C characteristics are recommended.
