Data Sheet

Technical System Catalogue/Climate control
Cooling units
3 - 21
In the outer circuit, enclosure cooling units should be spaced
> 200 mm from the wall and/or from each other (air inlet and
outlet openings). In order to ensure adequate air circulation,
at least one air outlet opening must be kept free.
If this clearance cannot be maintained, air baffle plates will
need to be used.
Roof-mounted cooling units
A range of installation positions may be considered for roof-
mounted cooling units, due, in part, to the routing in the
external air circuit. Thanks to this, together with their com-
pact dimensions, roof-mounted cooling units may even
be installed in low-height rooms and with bayed enclosure
suites. As supplied, the units draw air in at the front and
exhaust it via the rear and sides. Exhaust via the top is also
available as an option, however, regardless of the type of
installation, the units must be free to exhaust air via at least
one of these routes.
Wall-mounted cooling units
There are no restrictions to the installation position of wall-
mounted cooling units provided that the air intake and
exhaust areas at the front are not obscured. Wall-mounted
cooling units may be mounted on the rear panel, side panels
or door of the enclosure.
Distance from the wall
at least 200 mm
External circuit –
Flow and siting conditions
Attention should be paid to installed equipment that is fitted
with its own ventilation system, such as blowers and axial
fans. If their air flow is directed against the chilled air flow
of the cooling unit, the air may short-circuit, bypassing the
component. In the worst case, the internal safety systems
of the cooling unit would discontinue cooling operation.
Note:
Never direct the chilled air flow at active components.
Accessories:
Air diverter, see Cat. 33, page 475.
65
1)
External
air circuit
Internal
air circuit
1)
115 mm for SK 3213.330
Air diverter
Internal circuit –
Wall-mounted units
Flow conditions