Control Principle - Regin PULSER-M Manual

PULSER-M
1 2 3 4
TG-K3xx
TG-R4xx
G G G G
TG-G1xx
2
3
Fig 5
1 2 3 4
TG-K3xx
G G TBI-xx
TG-G1xx
1
2
Fig 6
° C
K K
Fig 7
1 2 3 4
Min/Max
M M
TG-K3xx
Fig 8
1 2 3 4
Min/Max
M M
TG-K3xx
Fig 9
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INSTRUCTIONS
Figures
Fig 1: Wiring of supply voltage and heater.
Fig 2: Switch setting for internal set-point and sensor.
Fig 3: Switch setting and wiring for internal set-point and external
sensor.
Fig 4: Switch setting and wiring for room control using TG-R4xx as
sensor and set-point.
Fig 5: Switch setting and wiring using external separate sensor and
TG-R4xx as set-point.
Fig 6: Switch setting and wiring using external, separate sensor and
potentiometer TBI-xx as setpoint.
Fig 7: Wiring of night set-back
Fig 8: Switch setting and wiring of minimum limit sensor.
Fig 9: Switch setting and wiring of maximum limit sensor.

Control principle

PULSER-M pulses the full load On - Off. PULSER-M adjusts the
mean power output to the prevailing power demand by proportio-
nally adjusting the ratio between On-time and Off-time. The pulse
period (=the sum of On-time and Off-time) is fixed at 60 seconds.
PULSER-M has zero phase-angle firing to eliminate RFI.
PULSER-M automatically adjusts its control mode to suit the control
object dynamics.
For rapid temperature changes i. e. supply air control PULSER-M
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 PULSER-M will act
as a P controller with a proportional band of 1.5K.
Start-up and fault finding
Be careful when working in the PULSER-M. All internal compo-
nents including the cooling flange are at line voltage potential.
Never leave the unit under power without the front cover on.
1. Check that all wiring is correct and that the sensor selector swit-
ches are in the correct position.
2. Measure the resistance between terminals 3 and 4: At 230V:
14.4Ω<R<230Ω.
At 400V: 25Ω<R<400Ω.
3. If a minimum limit sensor is connected, set the limit potentiome-
ter fully clockwise
If a maximum limit sensor is connected, set the limit potentiome-
ter fully counter-clockwise
INSTRUCTIONS
4. Connect supply voltage and twist the setpoint knob between
end stops. Check that the LED which is visible through the
bottom of PULSER-M goes on and off when the setpoint
value is higher and lower than the temperature at the sensor.
When the setpoin knob is set to the actual sensor tempera-
ture and the min/max-potentiometer is set so that it doesn't
influence the control, the LED will pulse On-Off as the PUL-
SER-M pulses current to the heater. The pulse cycle period
is approx. 60 seconds. Check with a clamp-on ammeter that
current is flowing to the heater.
Something wrong?
5. Dissconnect power and remove wiring to external sensor/
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 up-
per 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.
6. Set sensor selector switches 1 and 2 in the downwards
position but leave the sensor inputs G-G open. Set both min/
max-switches, 3 and 4, in the downward position. Switch on
the voltage.
PULSER-M 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 1 and 2 and recheck the positions
of the sensor selector switches. If OK the PULSER-M is
probably faulty.
If the LED lights up but no current is flowing: Recheck the
heater resistance as above. If OK the PULSER-M is probably
faulty.
7. Shut off power and short-circuit the sensor input G-G but
leave the switches in the downwards position. Switch on
power again.
PULSER-M should not give out any power at all and the LED
should not light up. Check with a clamp-on ammeter that no
current is flowing to the heater.
If the LED is off but current is flowing to the heater the
PULSER-M is faulty.
If the LED is lit, recheck the shorting of terminals G-G. If OK
the PULSER-M is faulty.