INSTRUCTION
Read this instruction before installation
and wiring of the product
PULSER
Consult documentation in all cases where this symbol
is used, in order to nd out the nature of the potential
hazards and any actions to be taken
1
PULSER
Technical data
Supply voltage 200...415 V AC, 50...60 Hz, 1- or 2-phase,
with automatic voltage adjustment
Power output Up to 16A, min. 1 A. At 230 V, max. output is
3.6 kW and min. output 230 W. At 400 V max.
output will be 6.4 kW and min. output will be
400 W.
Ambient temperature Max. 30°C (Note: PULSER generates 20 W
heating at full load.)
Storage temperature -40...+50°C
P-band 20 K (rapid temperature changes),
1.5 K (slow temperature changes)
I-time 6 min (rapid temperature changes)
Pulse period 60 s.
Indicator Red LED on PULSER, lights up as power is
pulsed to the heater
Mounting Wall
Protection class IP20
Control unit parameters Supply air control: PI function using P-band
20 K and I-time 6 min. Room control: P func-
tion using P-band 1.5 K
Built-in sensor Measurement range 0...30°C
Input external sensor/
setpoint For Regin brand NTC sensors and setpoint
devices, temperature range depends on
measurement range of sensor
Weight 0.3 kg
Dimensions (HxBxD) 153x93x40 cm
Settings
Setpoint 0...30°C
Night set-back 0...10 K
Control principle
PULSER pulses the full load On-Off. PULSER adjusts its mean power
output to the prevailing power demand by proportionally adjusting the ratio
between On-time and Off-time. The pulse period (= the sum of On-time
and Off-time) is xed 60 seconds.
PULSER has zero phase-angle ring to eliminate RFI.
PULSER automatically adjusts its control mode to suit the control object
dynamics.
For rapid temperature changes (i. e. supply air control), PULSER 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 will act as a
P controller with a proportional band of 1.5K.
Assembly
Remove the front (the locking screw is located behind the setpoint
knob) and mount PULSER vertically, so that the cooling ange is at its
top. Screws with a maximum head diameter of 5.5mm can be used.
If PULSER is to be used with the internal sensor, mount it approx.
5ft above oor level at a location with a representative temperature.
The air must be able to circulate freely around the PULSER, without
disturbances from doors, furniture, etc.
If PULSER is to be used with an external sensor it may be placed in
any location.
PULSER emits approx. 20W of heat which must be dissipated.
At full load, the maximum ambient temperature is 30°C.
Electrical installation
The installation, which should be proceeded by a fully isolating switch
with a contact gap of at least 3 mm, should be carried out by a quali-
ed technician and in accordance with applicable directives.
K12U34UKGG
Figure 1: Wiring of supply voltage and heater
Terminals 1 and 2: Not polarity sensitive.
Supply voltage: 200 - 415V AC, 50 - 60 Hz with automatic
voltage adjustment.
Maximum current: 16A.
Terminals 3 and 4: Resistive single- or two-phase heater
Maximum load: 3680W at 230V (16A),
6400W at 400V (16A)
Minimum load: 230W at 230V (1A)
400W at 400V (1A)
CAUTION: The cooling ange is live!
1797I
APR 13
EN
Triac controller for proportional control
of electric heating
PULSER is a complete proportional controller for electric heating.
It has automatic voltage adjustment and can be used with either a
built-in sensor or an external sensor. PULSER pulses the whole load
On - Off. The ratio between On-time and Off-time is varied 0 - 100%
to suit the prevailing heat demand. The current is always switched at
zero phase angle to prevent RFI.
PULSER is only intended for control of electric heating: its con-
trol principle makes it unsuitable for control of motors or lighting.
PULSER cannot control 3-phase loads, as one phase is regulated.
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