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TG-K3xx
1 2
3 4
TBI-xx
TG-G1xx
1
2
Figure 6: Wiring of an external, separate sensor and a TBI-xx
potentiometer as a setpoint device
Limitation sensor
Terminals 5 and 6. Polarity insensitive. Low voltage.
During room temperature control, the supply air temperature can be
provided with a minimum or maximum limitation. The limitation
sensor is placed in the supply air duct, after the heater. Switches 2
and 3 are used to set the desired function. The Min. and Max. poten-
tiometers are used to set the desired limitation temperatures.
5 6
TG-K360
Figure 7: Wiring of a limitation sensor
NOTE: TG-K360 must be used.
Settings
Potentiometers
Setp.
Setpoint 0...30°C.
Min
Minimum supply air temperature limit for room control with
minimum limitation. 0...30°C
Max
Maximum supply air temperature limit for room control with
maximum limitation. 20...60°C.
CT
Pulse period. 6...120 seconds.
Switches
1
Down = Using external setpoint potentiometer
Up = Using integrated setpoint potentiometer
2
Down = Minimum limitation deactivated
Up = Minimum limitation active
3
Down = Maximum limitation deactivated
Up = Maximum limintation active
NOTE: The minimum and maximum limitation functions
can be used separetely or at the same time.
Control principle
•
TTC2000 pulses the entire load On-Off.
•
The controller will adjust the mean power output to the current power
demand by proportionally adjusting the On-time and Off-time ratio.
•
The pulse period (= the total sum of the On-time and Off-time) is
settable 6...120 seconds by using the potentiometer.
•
TTC2000 uses zero phase-angle firing to eliminate radio frequency
interference.
•
The controller automatically adapts its control mode to suit the
dynamics of the controlled object.
•
For rapid temperature changes, such as supply air control, TTC2000
will act as a PI controller with a set P-band of 20 K and a set I-time of
6 minutes.
•
For slow temperature changes, such as room control, the controller
will act as a P controller with a set P-band of 1.5 K.
External control signal
TTC2000 can also be used for control with an external 0...10 V DC control
signal from another controller.
Remove the wire strap between terminals 7 and 9 and connect the control
signal as shown in figure 8.
7
8 9
Remove
0-10V DC in
wire
Signal neutral
Figure 8: Wiring of external control signal
A control signal of 0 V will provide an output of 0 % and a control signal of
10 V an output of 100 %. The minimum and maximum limitation functions
are not active when using this control mode.
TT-S1
The power handling capacity of the controller can be increased by using
the TT-S1 relay control board. On increasing heat demand the controller
will primarily activate the triac controlled output. When it is running at full
output, the TT-S1 relay output will be activated and the triac controlled
output will be reduced. For best control the two part loads must be of
equal size.
For wiring diagrams and more information, see the instruction for TT-S1.
TTC2000
Start-up and fault finding
1.
Begin by ensuring that all wiring has been performed correctly
and that all sensor selection switches are in their correct
positions.
2.
Measure the resistance between terminals L1out - L2out,
L1out - L3out and L2out -L3out:
At 230 V line voltage: 10.6 Ω <R <66.4 Ω.
At 400 V line voltage: 18.4 Ω <R <115 Ω.
3.
Switch on the supply voltage and turn the setpoint knob to its
maximum value. The LED should be either continuously on, or
pulse on/off with a progressively longer ontime so that it is even-
tually on continuously.
4.
Turn the setpoint knob to its minimum value. The LED should
either switch entirely off or pulse with a progressively shorter on-
time so that it finally switches off completely. At a middle position
of the proportional band (when the setpoint = the actual value),
the pulsing of the LED will perfectly coincide with the control-
ler pulsing current to the heater. The pulse cycle time is 6...120
seconds depending on the settings of the CT potentiometer. Use
a clamp-on multimeter to ensure current is passing to the heater
when the LED is lit.
Troubleshooting
1.
Disconnect all wiring to the external sensor and setpoint device
(if any). Measure the resistance of the sensor and/or setpoint
potentiometer separately. The resistance of the potentiometer
varies 0...5 kΩ between its minimum and maximum settings. The
sensor resistance varies 10 kΩ...15 kΩ between the minimum
and maximum temperature range. I.e. a TG-K330 has 15 kΩ at
0°C and 10 kΩ at 30°C. The resistance changes by 167 Ω/°C.
2.
Leave the sensor terminals disconnected. Set all switches to
their downward positions. Switch the supply voltage on.
TTC2000 should provide full, unimpeded output and the LED
should be lit. Use a clamp-on multimeter to ensure current is
passing to the heater.
If the LED is not lit and no current is flowing: Ensure that termi-
nals L1in, L2in and L3in all have power. If they do, TTC2000 is
probably faulty.
If the LED is lit but no current is flowing: Measure the heater
resistance. If it is OK, TTC2000 is probably faulty.
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