Energotech EVR Instruction

INSTRUCTION
EN
EVR
i
Read this instruction before installation
and wiring of the product
Consult documentation in all cases where this symbol
is used, in order to find out the nature of the potential
hazards and any actions to be taken
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 cannot control 3-phase loads, as one phase is regulated.
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. = 3.6 kW, min. = 230 W.
At 400 V, max. = 6.4 kW, min. = 400 W.
Max. 30°C (Note: EVR generates 20 W
Ambient temperature:
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.
Red LED on EVR, lights up as power is
Indicator:
pulsed to the heater.
Surface, Wall.
Mounting:
Protection class: IP20.
Supply air control: PI function using P-band
Control unit parameters:
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.
For Energotech brand NTC sensors and
Input external
sensor/ setpoint: setpoint devices, temperature range depends
on measurement range of sensor.
Weight: 0.3 kg.
Dimensions (HxBxD): 153 x 93 x 40 cm.
Settings
Setpoint: 0...30°C.
Night set-back: 0...10 K.
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.
EVR
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 5.5 mm can be used. If
EVR is to be used with the internal sensor, mount it approx. 1.5m
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-
fied technician and in accordance with applicable directives.
K 1 2 U 3 4 U K G G
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 flange is live!
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