Regeneration Heating; Start-Up; Starting; Maintenance - Trotec TTR 250 HP Mode D'emploi

Regeneration Heating

The PTC regeneration heating used has the follo-
wing advantages:
- Power consumption is varied easily by the air
volume flow .
- There is no overheating; the heating flow goes
down to zero when there is no airflow .
This is made possible by the PTC thermistor, i .e ., by
a temperature-dependent semiconductor resistor .
Its resistance value increases very strongly when
the temperature rises, starting at a defined tem-
perature (Curie point) . This positive temperature
coefficient is the very origin of the PTC thermistor's
name . In practice, this characteristic resistance
curve makes for a temperature which remains al-
most constant over a wide range . Variations in room
temperature, voltage or in the airflow will only have
a small influence on thermistor temperature .
The regeneration airflow may be reduced corres-
pondingly if the maximum dehumidifier capacity
is not required . Heating will react immediately by
a higher resistance, while maintaining the surface
temperature .
Thus, a smaller regeneration airflow means a lower
heating capacity while maintaining the regenerati-
on air at an almost constant temperature .

04. START-UP

Starting

1 . Check whether the reducing dampers (if any) are
widely open and whether the air ducts are free .
2 . Are the filters mounted correctly?
3 . Is the preliminary safety device selected correctly
according to the technical data?
4 . Start the air dehumidifier by setting the ON/OFF
switch to „ON" . The control light in the switch
shows that the device is operating .
5 . Use the reducing dampers installed on the building
side to adjust the air volumes .
B - 5
Process and humid air volumes must always be tuned
in proportion to one another . The rotor will become too
hot and the capacity for dehumidification will not be
used efficiently if the humid air volume is too big .
The humid air volume should also be adjusted by re-
duction at the outlet when the dry air volume has been
adjusted . A temperature of less than 50°C should be
used as a reference value at the humid air outlet .
The smaller the humid air value, the lower is the hu-
mid air temperature .
The humid air volume may be reduced if the capacity
for dehumidification is not needed .
TROTEC air dehumidifiers are designed for long ope-
rating times without needing a great effort in terms of
maintenance . Please observe the following notes:
Disconnect the air dehumidifier from the mains before
dismounting the air dehumidifier . If it has been in ope-
ration before this, let the air dehumidifier cool down
for about 15 minutes before dismounting .
A. Filter Replacement
Filters should be checked and replaced if necessary
on a regular basis . The intervals between each filter
replacement depend on the application of the device
in the corresponding individual case . A filter life of ap-
proximately 6 months may be assumed under normal
conditions .
Clogged filters affect filter capacity .
Never operate the dehumidifier without having in-
stalled the filters correctly!
B. General Maintenance
We recommend to check all installed components
every 6 months or more frequently if required by utili-
sation, and to clean the following parts using a vacu-
um cleaner or compressed air under low pressure:
Operating manual – Air Dehumidifiers TTR 250 HP
m CAUTION: Clogged filters reduce the
air volume.

05. MAINTENANCE

EN