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Wiring
Sheet Metal Switchboard Box
This box is intended for installation of electrical elements. It is
integrated into the interior of the compact air-handling unit
and accessible through the door on the service side. The door is
equipped with a safety closure opened by a triangular key no. 8
which must be stored on a dedicated place under supervision of
a responsible person.
Figure 14 – Interconnection of blocks using the connectors
Figure 15
sheet metal switchboard box is heated by a heating mat to protect
electrical elements.
If the integrated control unit is included in the delivery, the
sheet metal box contains all the parts of the control unit and its
associated elements, including protection, controller, transfor-
mer, connecting terminals and main switch with the red handle
Figure 16
1
2
10
The degree of protection
of the sheet metal box is
IP IP44 when the door is
closed and IP20 when the
door is closed.
All box parts are made of
bent sheet steel galvani-
zed with a 275 g/m2 zinc
layer and finished with
powder coating.
If the outdoor version of
the air-handling unit is
ordered, the integrated
in the yellow field.
If the air-handling
device is ordered with
an externally connected
control unit, the air-han-
dling device is equipped
with an integrated sheet
metal terminal box –
connecting box. . The
degree of protection of
the sheet metal box is
IP IP44 when the lid is
closed.
The terminals can only be accessed after opening the air-hand-
ling device's service doors and removing the lid.
Figure 17 – Box closure with a triangular key
Instructions for Cabling
All interconnections of the distribution board and installed
elements must be made using intact double insulated cables
which must be properly dimensioned for the given load and
lead length.
Every cable leading out through the sheet metal parts must
be led through the preinstalled cable grommets. All unused gro-
mmets must be blinded to maintain the degree of protection.
The main power supply cable harness must be dimensioned
for the total current of the unit.
A central sheet metal cable trough with outlets fitted with
grommets is installed along the rear wall to ensure safe leading
of the cables.
When connecting and leading the cables, it is necessary to
take into account their properties. The conductors must not be
exposed to strains which decrease their service life. Avoid cable
slack;
Always use cable protectors and troughs (wire, plastic, or
metal) of sufficient size and length.
WAGO screw-free terminals are used to connect the con-
ductors. If stranded conductors are used, it is recommended to
provide their insinuated ends with cable tubes.
Properly fix all cables and maintain minimum bending radi-
uses.
The M&C cable lines must be led separately from the power
cables to avoid their interference. We recommend running the
power cable lines along the base frame and the M&C cable
lines along the front edge of the top panel.
The cable lines must never interfere with the service panels
(doors) of the unit and control unit and obstruct routine operati-
on and servicing. Please respect the reserved servicing space.
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