14
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2.42
Katherm QE –
Tangential fan convection with electric heating element
Ready-to-install convector-based floor trenches
Assembly and installation instructions
10.3 Description of PCB
Performance data:
Switching power for the heating element = 2000 W
Switching power for the EC fan = 13 W
Terminal assignment
X1
mains
Mains connection (208 V/60 Hz)
X2
vault
Potential-free fault alert output (max. load 60 V AC/DC / 1 A
enable
DI1, potential-free enable contact
24V
Voltage output 24 VDC (max. 40 mA)
0-10V
AI1, Control signal 0...10V = Heating output 0...100% (Ri = 100KOhm)
NTC 10K
AI2, Temperature sensor
X3
STB
Safety temperature limiter
STB
Safety temperature limiter
RPM
Input signal of the number of revolutions of the EC tangential fan
ERR
Input signal of the status of the EC tangential fan
24V
Supply voltage (+) for the EC tangential fan
GND
Supply voltage (-) for the EC tangential fan
Functional description
The factory setting activates the electric heating element with a heat output of 20%
and, at the same time, the EC tangential fan with minimum fan revolution at a control
voltage of 2 VDC.
Increasing the control voltage to 9 VDC increases the electric heat output and the fan
speed proportionally to the control voltage to up to 100%.
Setting the DIP switch 2 to „ON“ increases the minimum fan speed of the EC tangential
fan whilst keeping the heat output unchanged.
In the lower speed range, the discharge temperature is lowered by this.
The accumulation of heat is prevented when the electric heating element is switched off
by the fan running on for 90 seconds.
Setting the DIP switch 3 to „ON“ increases the minimum electric heat output to 30%
whilst keeping the fan speed unchanged. Primarily in the lower bandwidth of the control
voltage, this enables a higher heat output, which also slightly raises the discharge
temperature of the Katherm QE.
Terminal assignment X1
LED status messages
Terminal assignment X2
DIP switch
settings
Terminal
assignment
X3
Содержание Katherm QE
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