Klingenburg KR4 - Functions of the KR4 and KR7 Basic Controllers; Manual Operation; External Operation; Rotation Monitor and Speed Display

·KLINGENBURG
5
Functions of the KR4 and KR7 basic controllers
Self-cleaning operation
One result of the constant air flow in regenerative heat
exchangers is a very beneficial self-cleaning effect. As a result,
cleaning is not required in most cases. In case of doubt, please
consult us.
At times when the ventilation unit is running but the rotor
function itself is not required, it is still expedient to activate the
rotor periodically. The cleaning cycle can be set for 20, 40, 60,
80 or 100 minutes. In this manner smaller dirt deposits can be
cleaned away.
Speed display
You can calculate the speed of the rotor from the frequency.
80 Hz corresponds to approximately 10 rpm.
Rotation monitor
As the rotor turns, the rotation is monitored by a magnetic
proximity switch mounted inside the rotor case. A magnet
which is mounted on the circumference of the rotor reports the
rotation movement back to the controller. In case of a rotor
operation fault, e.g. the V-belt comes off, the fault contact
switches over from S1 to S2. The following error message then
appears on the display.
KR4 = 400 Watt for rotor diameters smaller than 3760 mm
KR7 = 750 Watt for rotor diameters bigger than 3760 mm
The electronics function test checks motor current and processor
operation. After starting the motor it checks the functions of the
motor. In addition it verifies for short circuits or earth faults.
In case of a fault the fault contact switches over from S1 to S2.
The error message appears on the display. (see page 16)
Example:
Operation mode: Manual operation
In manual operation mode you can determine by depressing
the selection push-button a fixed rotational speed.
Operation mode: External operation
By evaluation of a external control signal (0 - 20 mA, 4 - 20 mA or
0 - 10 V) the rotational speed is justified.
Hardware err:EXX
If the rotor stops turning, the reaction time of the controller will
vary between 0.5 and 3 minutes, depending upon the speed of
the rotor beforehand. The controller renews operation once the
error message has been acknowledged by pressing the three
buttons on the controller.
The function of the rotation monitor is not active at frequencies
£ 10 Hz.
The rotation monitor is a component of the basic controller. If
you require this function, you must order the magnetic
proximity switch and the installation set that comes with it
(KR4 R or KR7 R).
Runcontrol error