GB.EXCHSILV2.141119
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Control with 0 – 10 V DC
The heat exchanger control system can be controlled via
external input signals. The heat exchanger control system
needs a start/stop signal in order to start. The start/stop
signal is transmitted by short-circuiting Terminals 7 (Start/
stop) and 8. ( ) (See Fig. 2).
The heat exchanger control system regulates the speed
linearly between 0 % and 100 %, however it is limited to
the regulation range between the preset lowest and high-
est speeds (See Fig. 3) 100 % speed is defined as an input
voltage of "0-10 V in" (Terminal 13) at 9.5 V (100 % at
9.5 V, +/-2 %).
Compensation for non-linear heat transfer
The 0 – 10 V signal is compensated internally in the heat
exchanger control system with a contrary rotor character-
istic to provide far more linear heat transfer than compara-
ble systems and better regulation (See Fig. 4).
The function selector switch positions (Factory
preset):
4 = Sizes 100/120, standard rotor
5 = Sizes 50/60, sorption rotor
6 = Sizes 70/80, sorption rotor
7 = Sizes 100/120, sorption rotor
To reverse the direction of rotation
The direction of motor rotation is reversible so that the
rotor always has the correct direction of rotation in rela-
tion to the purging sector.
To reverse the motor's direction of rotation, transpose two
optional conductors to Motor Terminal V - U - W (See Fig.
6).
Automatic restart after alarm
The heat exchanger control system automatically attempts
to start again following an alarm, such as over or under-
voltage alarm. This automatic restart is carried out maxi-
mally 3 times (rotation monitor alarm: 1 restart) After that,
the heat exchanger control system will remain in the error
mode, and must be restarted by resetting the alarm.
Alarm resetting: See Section on "Alarm resetting".
Alarm relay/output
The heat exchanger control system is equipped with an
alarm output in the form of an alarm relay. The alarm relay
is activated if an alarm arises in the heat exchanger control
system or if alarms are discovered in motors or fans. Con-
nect the alarm signal cable leads to Terminals 16 (C) and
17 (normally closed). The relay contact is closed in deener-
gized condition and if there are active alarms.
Alarm reset
The heat exchanger control system is equipped with a
digital input for resetting alarms. The alarm input is reset
by short-circuiting Terminals 11 (Alarm reset) and 12 ( )
(See Fig. 2). The alarm output can also be reset by switch-
ing off the supply voltage to the heat exchanger control
system for more than 60 seconds.
Fig. 2. Junction box, overview of the wiring terminals
Fig. 3. The ratio between the speed and the min./max. speed setting
.
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.
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Fig. 4. Compensation for non-linear heat transfer.
