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Product description
The dehumidifier is designed to meet the
requirements of IEC protective class IP 44.
Casing
The casing is fabricated from stainless steel and
is insulated including inner panels. The top of
the dehumidifier has a panel that can be
removed for service access. All duct
connections to the dehumidifier are designed
for connections to standard size spiral ducts.
Rotor
The dehumidifier has a drying rotor fabricated
from a desiccant material. The rotor has a
matrix of corrugated and flat heat resistant
sheets which houses the Silica Gel desiccant
agent. This matrix creates a large number of
axial flutes through the rotor, which together
builds up an immense surface area for moisture
adsorption in a small volume. The rotor is
manufactured and processed to be able to
withstand moisture saturated air without being
damaged. This means the rotor can be used in
conjunction with a pre- cooling coil.
Furthermore the rotor will not be damaged
even if the fan or the heater for reactivation
should fail during operation. The rotor is
incombustible and non-flammable.
Rotor sealings
The rotor has two pheriperical sealings.
Rotor drive system
The slow rotation of the rotor is achieved by an
electrical gear motor and a belt drive. The belt
sits on the outer rim of the rotor and is driven
by a pulley on the drive motor. A belt tension
device keeps the belt in place and maintains
tension to prevent belt slip. Correct operation
of the drive system, and direction of rotation
can be checked by opening the front panel.
The centre hub of the rotor is equipped with
ball bearings. The rotor shaft is made from
stainless steel.
© 2016 DehuTech AB - Subject to change without notice
Filters
The dehumidifier has two separate filters. One
in the process air inlet and one in the
reactivation air inlet.
Fans for process- and reactivation air
The fans are direct driven radial fans with a
three phase EC motor for the process air fan
and a single phase EC motor for the
reactivation air fan, class IP 54, ISO F. The fans
are accessible for service behind the panels.
Heater for reactivation air
The reactivation heater is of the PTC-type
(Positive Temperature Control), which cannot
be overheated, and gives the possibility of a
stepless control for 50 - 100 % of the
dehumidification capacity. This is achieved by
controlling the reactivation air volume.
Electrical panel
The electrical panel is located in a separate
compartment at the top of the dehumidifier.
Switches and indications for operation are
mounted at the front of the dehumidifier.
Operation options
Using the operation switch on the dehumidifier,
different running options can be selected:
0
Dehumidifier not in operation.
MAN
Dehumidifier in continuous
operation.
AUTO
Automatic operation by remote
humidistat, or other external
start/stop signal.
In the electrical compartment, there is a switch
marked S3, which allows continuous operation
of the dry air fan.
For dehumidifiers with PLC, the operation
is described in the PLC controller manual.
DT-3500 - 6
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