Energotech EVR Instruction page 2

G G
Figure 2: Switch setting for internal setpoint and sensor
Terminals G and G: Not polarity sensitive.
Note: When using an external sensor, the equivalent sensor func-
tion in the EVR must be disabled. This is done by setting the DIP-
switches to the right of the terminal strip according to figure 3.
G G
TG-K3xx
TG-G1xx
Figure 3: Switch setting and wiring for internal set-point
and external sensor*
G G
TG-R430
1
3
Figure 4: Switch setting and wiring for room control
using TG-R430 as sensor and setpoint
TG-K330
TG-R430
G G
TG-G130
2
3
Figure 5: Switch setting and wiring for room control using
external separate sensor and TG-R430 as setpoint
TG-K3xx
G G TBI-xx
TG-G1xx
1
2
Figure 6: Switch setting and wiring using external,
separate sensor and potentiometer TBI-xx as setpoint*
The EVR sensors have high potential compared to neutral and
earth (>200 V). As such, wiring and installation of the sensors must
comply with local codes for line voltage installations.
*xx: Various temperature ranges are available. For example:
TG-G150 = 20...50°C, TG-K370 = 40...70°C, etc.
° C
K K
Figure 7: Wiring of the night set-back function
Terminal K and K: Potential-free closure will give a night set-
back of 0 - 10K. Settable with a potentiometer in the EVR.
EVR
Setpoint range limiting
The setpoint range can be limited mechanically using the limiting
rings behind the setpoint knob.
Set the knob to a temperature within the desired limiting range, then
carefully pull the knob loose.
Now loosen the screw locking the two rings. Rotate the blue ring so
that the protruding part is slightly lower than the lower temperature
limit. Use the markers on the bottom of the cover's knob-cutout as an
aid. The markers are 5° apart.
In the same way set the red ring to a value slightly higher than the
upper limit temperature. Retighten the locking screw without disturb-
ing the position of the rings.
Replace the knob and check the result. Make fine adjustments if
necessary.
Start-up and fault finding
CAUTION: Be careful when working inside EVR! All internal
components, 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
switches are set in their accurate positions.
2.
Measure the resistance between terminals 3 and 4:
At 230 V: 14.4 Ω<R<230 Ω. At 400 V: 25 Ω<R<400 Ω.
3.
Connect the supply voltage and turn the setpoint knob to its
maximum value. The LED visible through the bottom of EVR
should be continuously lit or pulse on/off with longer and longer
ontime, eventually to be continuously on.Turn the setpoint to its
minimum value. The LED visible through the bottom of EVR
should be continuously off or pulse on/off with longer and longer
offtime and eventually be continuously off. At a certain position
(within the proportional band) the LED will pulse On-Off as the
EVR pulses current to the heater. The pulse cycle period is
approx. 60 seconds. Check with a clamp-on ammeter that cur-
rent is flowing to the heater.
If something is wrong
1. Remove wiring to external sensor. The sensor resistance varies
between 10kΩ and 15kΩ between the upper and lower ends
of the sensor temperature range. The resistance changes by
167Ω/°C.
2. Set both of the sensor selector switches to their downward posi-
tions, but leave sensor inputs G-G open. Switch the voltage on.
2