Product Description; Casing; Rotor; Filter - Dehutech 450 Technical Manual

Product description

The dehumidifier is designed to meet the
requirements of IEC protective class IP 44:

Casing

The casing is fabricated from stainless steel
2333. The top of the dehumidifier has a top
panel that can be removed for service access to
electrical and mechanical components. 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 mois-
ture saturated air without being damaged. This
means that 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.
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. An adjustable belt
tension device keeps the belt in place and main-
tains tension to prevent belt slip. Correct opera-
tion of the drive system, and direction of rotation
can be checked by opening the top panel.
The centre hub of the rotor is equipped with ball
bearings. The rotor shaft is made from stain-
less steel. The complete rotor part can easily be
removed and lifted as one piece out from the
casing.

Filter

The dehumidifier has two separate filters. One in
the process air inlet, and one in the reactivation
air inlet.
Subject to change without notice
Fans for process- and reactiva-
tion air
The fans are direct driven radial fans with single
phase standard motors class IP 54, ISO F. The
complete fan assembly is easily removed and
lifted out from the casing.

Heater for reactivation air

The reactivation heater is of the PTC-type
(Positive Temperature Control), which can not
be overheated, and gives the possibility of a
stepless control for 30 - 100 % of the dehumidi-
fication capacity. This is achieved by controlling
the reactivation air volume.

Electrical panel

The electrical components is located inside the
dehumidifier and are accessible through the top
panel. Switches and indications for operation are
mounted at the front of the electrical panel.

Operation options

Using the operation switch on the front side of
the dehumidifier, different running options can
be selected:
0 Dehumidifier not in operation.
1 Dehumidifier in operation mode.
MAN Dehumidifier in continuous
operation.
AUTO Automatic operation by remote
humidistat, or other external
on/off signal.
6
DehuTech 450