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EGULUS - SRS 3 Controller - www.re
ulus.
A 7 - Electrical wiring
Low-voltage cables such as temperature sensor cables must be routed separately from mains
voltage cables. Feed temperature sensor cables only into the left-hand side of the unit, and mains
voltage cables only into the right-hand side.
The controller is not equipped with a mains switch. For this purpose please use e.g. a circuit
breaker or just unplug the device. The cables being connected to the unit must not be stripped by
more than 55 mm, and the cable jacket must reach into the housing just to the other side of the
strain relief.
Relay R1 is only suitable for standard pumps (20-120VA) which are speed-controlled via the con-
troller. The internal wiring of the controller is such that residual currents flow over relay R1 even in
the rest condition. Therefore under no circumstances may valves, contactors or other consumers
with low power consumption be operated on this output.
With hydraulic variant 1 (Solar system with storage tank) relays R1 and R2 are switched on simulta-
neously.
Wiring instructions:
1. Make sure the circuit breaker is in off position and
power supply is off.
2. Select a suitable hydraulic scheme
(Chapters B1 to B20)
3. Open the controller.
4. Strip the cable by 55 mm max., insert and fit the
cable strain relief. Strip the last 8-9 mm of all the wires
(Fig. A 4.1).
5. Open the terminals using a flat screwdriver (Fig.
A 4.1) and wire the leads following the diagrams
(Chapter B1 to B20).
6. Refit the upper housing part and fasten with screw.
7. Switch on mains voltage and place controller in
operation.
Danger
Danger
A 8 - Installing the temperature sensors
The controller operates with Pt1000 temperature sensors.
Max. sensor lead length is 30 m and its cross section at least 0.75 mm
2
.
Make sure that the terminals of extension cables and sensors are properly tightened. Use only
immersion or pipe-mounted sensors. For solar collectors, use sensors of a suitable temperature
resistance (min. 180 °C) that are enclosed in the supply. The temperature sensor cables must be
routed separately from mains voltage cables!
Caution
Danger
Fig. A 4.1
Caution
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