Read this instruction before installation
and wiring of the product
EVR
Consult documentation in all cases where this symbol
is used, in order to nd out te nature of te potential
hazards and any actions to be taken
1
INSTRUCTION
EVR
Technical data
Supply voltage
Power output
Ambient temperature
Storage temperature
P-band
I-time
Pulse period
Indicator
Mounting
Protection class
Control unit parameters
200...415 V AC, 50...60 Hz, 1- or 2-phase,
with automatic voltage adjustment.
Up to 16A, min. 1 A.
At 230 V, max. 3.6 kWmin. 230 W.
At 400 V max. 6.4 kWmin. 400W.
Max. 30°C (Note: EVR generates 20 W
heating at full load.)
-40...+50°C.
20 K (rapid temperature changes),
1.5 K (slow temperature changes)
6 min (rapid temperature changes).
60 s.
Red LED on EVR, lights up as power is
pulsed to the heater.
Wall.
IP20.
ulirntrl: PI function using P-band
20 K and I-time 6 min. Rmntrl: P func-
..
Measurement range 0...30°C.
For E brand NTC sensors and
setpoint devices, temperature range depends
on measurement range of sensor.
0.3kg.
153x93x40 cm.
0...30°C.
0...10 K.
Built-in sensor
Input external
sensor/ setpoint
Weight
Dimensions (HxBxD)
Settings
Setpoint
Night set-back
Control principle
EVR pulses the full load On-Off. EVR 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 fixed 60 seconds.
EVR has zero phase-angle firing to eliminate RFI.
EVR automatically adjusts its control mode to suit the control object
dynamics.
For rapid temperature changes (i. e. supply air control), EVR 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), EVR 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 EVR vertically, so that the cooling flange is at its top.
Screws with a maximum head diameter of 5.5mm can be used.If
EVR is to be used with the internal sensor, mount it approx. .5
above floor level at a location with a representative temperature. The
air must be able to circulate freely around the EVR, without
disturbances from doors, furniture, etc.
If EVR is to be used with an external sensor it may be placed in any
location.
EVR 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:
Supply voltage:
Maximum current:
Terminals 3 and 4:
Maximum load:
Minimum load:
Not polarity sensitive.
200 - 415V AC, 50 - 60 Hz with automatic
voltage adjustment.
16A.
Resistive single- or two-phase heater
3680W at 230V (16A)
6400W at 400V (16A)
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
EVR 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. EVR 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.
EVR is only intended for control of electric heating: its con-
trol principle makes it unsuitable for control of motors or lighting.
EVR
R.
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