Controller Features - Wilo RAIN3 Notice De Montage Et De Mise En Service

en
6.2

Controller features

32
Description
10. Power supply
11. Cover
12. Check valve of the break-tank
13. Overflow probe
14. Rating plate
15. Wilo-RAIN3
16. Installation pipes
17. Rainwater storage tank
The Wilo-RAIN3 controller ensures:
ƒ
The start/stop of the pump according to the supplied water pressure and volume
flow.
ƒ
The rainwater storage tank level sensor.
ƒ
The three-way valve, set by default on rainwater mode that switches the supply to
the city main water in the break-tank if the rainwater level in the rainwater storage
tank is too low.
ƒ
Overflow detection in the break-tank.
ƒ
The automatic switch to city main water mode for a duration of 3 minutes (ad-
justable value in menu 5.56, see chapter 6.4) to renew the water in the break-tank if
not used for 3 consecutive weeks (adjustable value in menu 5.55) even if the rain-
water level in the rainwater storage tank is high.
Additional inputs and outputs are available to control optional devices or communica-
tion:
ƒ
Wastewater backflow detection in the rainwater storage tank.
ƒ
An immersed rainwater storage tank pump (230V, max. 3A) could be connected to
the controller (see chapter 7.5) to overcome possible suction problems if the maxi-
mum suction head of the main pump is exceeded (e.g. rainwater storage tank too
deep, pipe length too high). The zero-flow delivery head of the pump should not ex-
ceed 1 bar. The rainwater storage tank pump is switched on when the "rainwater"
mode is activated automatically or manually. Wilo offers pumps for such cases.
Please contact your installer.
ƒ
A potential-free contact triggers an optional external alarm (see chapter 7.5). OR in-
dicates a failure of the system.
NOTICE
The rainwater storage tank pump, the external alarm and backflow sensor are not
supplied with the system.
Overflow detection in the break-tank
Wilo-RAIN3 is equipped with an overflow sensor in the break-tank. In case of leakage
or if the float valve is not completely closed, the overflow failure is indicated and the
system switches the supply to the city main water until the water level in the break-
tank decreases. If the water level in the break-tank remains critical the acoustic alarm is
activated.
This overflow failure indication is cleared when the water level is nominal and by an ac-
tion on the touchscreen. If the failure remains active, the systems should be checked
and the break-tank removed for inspection (see chapter 7.3).
WILO SE 2020-02