Wilo RAIN3 Einbau- Und Betriebsanleitung Seite 57

6.4.2 Cable inlets and control device
wiring diagram
22 23 20
19 21 18
Fig. 19: Cable inlets
Installation and operating instructions • RAIN3 • Ed.04/2023-10
2. Remove the signal cable line sheathing (approx. 15 mm). The wire ends must be flush
with the splice ring (Item 4) or may protrude max. 2 mm, see Fig. 18.
3. The capillary cable must be 10 mm shorter so that the necessary connection to the at-
mosphere is not interrupted.
4. Insert the red wire of the level sensor cable into duct 1, the blue wire of the level sensor
cable into duct 2 and the capillary cable (length approx. 5 mm) into duct 3 of the splice
ring. (The numbers are stamped on the splice ring.)
5. Insert the prepared cable into the contact support (Item 5).
6. Tighten the union nut.
▶ The quick connection automatically establishes contact and strain relief when
tightened.
Before reconnecting, cut off the cable remains and establish a new contact as described
above. Reconnection with the same contact system is permitted up to a maximum of ten
times.
CAUTION
Malfunction due to improper installation
The capillary cable of the level sensor is used to transmit the current air
pressure to the sensor. The sensor cable can be extended to a limited ex-
tent.
• Do not block or kink the capillary cable.
• The opening of the capillary cable must be fixed in a dry environ-
ment and with connection to the atmosphere.
• It is possible to extend the sensor cable up to a length of 40 m.
For the extension, use a cable that is suitable for the conditions on site
(possibly an underground cable with a cross-section of at least 2 x
0.5 mm²).
A special IP65 terminal box with pressure compensation (accessories,
see Accessories [" 49] section) must be used as the connection point,
which ensures an exchange with the ambient pressure. There is no need
to extend the capillary to the control device here.
• Laying the sensor cable in an empty pipe is strongly recommended.
Cable inlets
Cable inlets, right
22 Rainwater storage tank pump
23 Main pump
20 Power supply
Cable inlets, left
19 Level sensor (Quickon connector)
21
• 3-way valve
• Pressure sensor
• Overflow sensor for replenishment reservoir
18 • External alarm (potential-free contact)
• Overflow sensor for rainwater storage tank
Control device wiring diagram
NOTICE
Control devices with and without internal fuse protection (F1) are used.
en
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