6.4.2 Electrical connection
Danger
• Make sure that the Mains supply to the unit is disconnected before performing any maintenance or
electrical work!
• All electrical connections must be carried out by an authorized installer and in accordance with
local rules and regulations.
• Operation in the refrigerant cycle and handling refrigerants must be performed by certified personnel.
1. Make sure that all of the cable joints and the two transparent pressure measuring tubes to the extract air
fan are correct assembled between the unit parts.
2. . Wire the prepared control cable to the Topvex TR electrical cabinet (in the supply air part), use the
prepared grommets. Connect the wires to the terminal blocks in the electrical cabinet according
to labelling on the wires and the electrical wiring diagram. See also the chapter Internal electrical
connections.
3. Move the Exhaust air temp. sensor "EHS", located at the extract air filter, from its place to the new
place by the label "EHS" in the SoftCooler.
Fig. 10 EHS shown at a left hand unit
4. Connect the unit electrically to the mains (400V 3N~, 50Hz) through the all pole circuit breaker (safety
switch), which is enclosed inside the unit on delivery. The wiring is
led through the top of the unit casing directly to the Topvex SoftCooler electrical connection box.
Dimension the wires and fuses according to the chapter Electrical data.
5. 5. Do the electrical connections for the Topvex TR air handling unit according to the installation
instructions that follows that unit.
6.4.2.1 External/Internal connections
See also the enclosed wiring diagram.
Mains supply (and in some cases By-pass damper) is the only external connection that should be
connected to the Topvex SoftCooler.
Installation instructions
208767
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Systemair Sverige AB
