Trotec TTR 2000 Mode D'emploi page 43

Regeneration air heater
Heating the regeneration air is effected by means of electric
heater batteries consisting of individual resistance heating
elements. Depending on the dehumidifier model and size of the
heater these can be designed as single- or multi-stage versions.
The regeneration temperature is regulated by a thermostatic
two-step control.
Safety temperature monitors (STW) measure both the
regeneration exhaust air temperature (RAL) and the
regeneration air temperature heating (RHZ). Primarily the
regulation is geared to a preferably constant RHZ. With a
decreasing moisture load however RAL might positively rocket,
so that the heating is down-regulated before reaching the RHZ.
Achieved in this way is an optimum performance adjustment of
the regeneration energy to the operating point.
Safety components
In order to protect the basic device from inadmissible
temperatures, it comes equipped with the following safety
components:
• a differential pressure switch (ΔP switch) to monitor the air
flow direction and the flow rate of the regeneration air
• a safety temperature limiter (STB RHZ) to monitor the max.
permissible temperature after heating (thermostat
maximum)
• a safety temperature limiter (STB RAL) as rotation control
for the rotor; it is situated in the exhaust air flow and
tripped by an inadmissible temperature rise resulting from
rotor standstill
• Depending on the selected options further components are
possible (see Technical annex).
Note
If a safety component is tripped, the device will be
switched off (STOP), but the overrun will remain
active.
Wait until the entire rundown period has lapsed before
accessing internal parts of the device.
EN
Electrical system
The entire switching and control technology is located in the
integrated electrical control box on the dryer housing. The
electrical control box is designed for a high safety standard with
protection type IP53 (see Technical annex).
Depending on the model, the terminals for remote monitoring
and control can either be accessed via the front cover or the
cover of the control box. This is also the place to access the
reset buttons of the safety temperature limiters and the
potentiometers for fan regulation. The cable gland for the mains
feed-in is located at the side of the device. The power supply is
connected directly to the terminals of the emergency stop main
switch.
Housing
Depending on the model the housing of the dehumidifier is
made of galvanized sheet steel or stainless steel sheet.
Options
There are additional options available for the desiccant
dehumidifiers of the "TTR..." series (see also chapter "Options"
in these instructions).
desiccant dehumidifier TTR 2000 / TTR 2800 / TTR 3700 6