Control Principle - Regin TTC40F Instruction

Limiting sensor (fig 7)
Terminals 5 and 7. Low voltage. Not polarity sensitive.
When running room temperature control the supply air temperature
can be maximum and/or minimum limited. The limiting sensor is
placed in the supply air duct after the heater.
Choice of function is done using switches 2 and 3. Choice of limiting
temperatures is done on potentiometers Min and Max.
Figure 7: Wiring of limiting sensor
N.B. As limiting sensor TG-K360 must be used.
Settings
Potentiometers
Setp. Setpoint 0 - 30°C.
Min Minimum limit for supply air temperature when running room
temperature control.
Max Maximum limit for supply air temperature when running room
temperature control.
CT Cycle time. 6 - 60 seconds.
Switches
1 Down = External set point in use.
Up = Internal set point in use.
2 Down = Minimum limit not active.
Up = Minimum limit active.
3 Down = Maximum limit not active.
Up = Maximum limit active.
N.B. Minimum and maximum limiting functions may be used sepa-
rately or at the same time.

Control principle

TTC40F pulses the full load On - Off. TTC40F adjusts the mean pow-
er output to the prevailing power demand by proportionally adjusting
the ratio between On-time and Off-time. The cycle time (=the sum of
On-time and Off-time) is adjustable 0 - 60 seconds.
TTC40F has zero phase-angle firing to eliminate RFI.
TTC40F automatically adapts its control mode to suit the control
object dynamics.
For rapid temperature changes i. e. supply air control TTC40F will act
as a PI-controller with a proportional band of 20K and a reset time of
6 minutes.
For slow temperature changes i. e. room control TTC40F will act as a
P-controller with a proportional band of 1.5K.
External control signal
TTC40F can also be run against a 0 - 10V DC control signal from another
controller.
Remove the wire strap between terminals 7 and 9 and connect the control
signal as shown in figure.
Figure 8: Wiring of external control signal
0V input signal will give 0% output and 10V input will give 100% output.
Minimum and maximum limit functions are not active when using an
external control signal.
Start-up and fault finding
1. Check that all wiring is correct and that the sensor selector switches
are in the correct position.
2. Measure the resistance between terminals L1out - L2out, L1out -
L3out and L2out -L3out:
At 230V phase-phase voltage: 6.4Ω<R<64Ω.
At 400V phase-phase voltage: 11.5Ω<R<115Ω.
3. Connect supply voltage and turn the setpoint knob to the maximum
value. The LED on the TTC40F should be continuously on or pulse
on/off with longer and longer ontime and eventually be continuously
on.Turn the setpoint to the minimum value. The LED should be conti-
nuously off or pulse on/off with longer and longer offtime and eventu-
ally be continuously off. At a certain position (within the proportional
band) the LED will pulse On-Off as the TTC40F pulses current to the
heater The pulse cycle period is approx. 6 -60 seconds depending
on the setting of the CT-potentiometer. Check with a clamp-on am-
meter that current is flowing to the heater.
Something wrong?
1. Remove wiring to external sensor ( and setpoint if any). Measure the
resistance of the sensor and setpoint separately. The potentiometer
resistance varies 0- 5kΩ between the lower and upper end-point.
The sensor resistance varies between 10kΩ and 15kΩ between the
upper and lower ends of the sensor temperature range. I.e. a TG-
K330 has 15kΩ at 0°C and 10kΩ at 30°C. The resistance changes
by 167Ω/°C.
TTC40F
2. Leave the sensor terminals unconnected. Set all switches in the
downward position. Switch the voltage on.
TTC40F should give full uninterrupted power and the LED
should be lit. Check with a clamp-on ammeter that current is
flowing to the heater.
If the LED is not lit and no current is flowing: Check that you
have power on terminals L1in, L2in and L3in and recheck the
positions of the sensor selector switches. If OK the TTC40F is
probably faulty.
If the LED lights up but no current is flowing: Recheck the heater
resistance as above. If OK the TTC40F is probably faulty.
3. Shut off power and short-circuit the sensor input 1 and 4. Switch
on power again.
TTC40F should not give out any power at all and the LED should
be extinguished. Check with a clamp-on ammeter that no current
is flowing to the heater.
If the LED is extinguished but current is flowing to the heater the
TTC40F is faulty.
If the LED is lit, recheck the shorting of the sensor input termi-
nals.
If OK the TTC40F is faulty.
4. If everything OK this far the TTC40F and the sensor/setpoint are
OK.
Shut off power, remove the wire strap from the the sensor input
terminals and reconnect external sensor(s) (and setpoint if any).
Set the switches to their correct positions. Connect power.
Low Voltage Directive (LVD) standards
This product conforms to the requirements of the European Low
Voltage Directive (LVD) 2006/95/EC through product standard
EN 60730-1.
EMC emissions & immunity standards
This product conforms to the requirements of the EMC Direc-
tive 2004/108/EC through product standards EN 61000-6-1 and
EN 61000-6-3.
RoHS
This product conforms with the Directive 2011/65/EU of the European
Parliament and of the Council.
Contact
AB Regin, Box 116, 428 22 Kållered, Sweden
Tel: +46 31 720 02 00, Fax: +46 31 720 02 50
www.regincontrols.com, info@regin.se
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