Wilo RAIN3 Notice De Montage Et De Mise En Service page 51

Application
3x +
6x + +
10x + +
Table 1: Selection table for diaphragm expansion tank
4 Application/use
4.1 Intended use
Installation and operating instructions • Wilo-RAIN3 • Ed.05/2024-02
• Coarse suction filter (type G = without non-return valve, type GR = with non-return
valve)
Extraction close to the basin floor:
• Foot valve with integrated non-return valve (alternative to floating extraction)
• Additional pump in the rainwater storage tank (e.g. TM32/8).
Required if:
–
pressure losses on the suction side of the system are too high,
–
suction line is not laid in a continuously ascending manner from the rainwater storage
tank to RAIN3,
–
suction line is longer than 20 m (also requires extension of the cable for the fill level
sensor).
• Special terminal box (pressure compensation box) IP65 with pressure compensation for
indirect connection of the cable for the fill level sensor
• Diaphragm expansion tank
Required if:
–
low flow over a longer time period,
–
static pressure changes due to temperature fluctuations,
–
frequent start and stop cycles.
Volume Tank pre-pressure (nitrogen or
air) [according to start-up pres-
sure in menu 1.04]
25 L
[1.2 bar]
60 L
100 L*
* 100 L shows a solution if the RAIN3 is not used as intended (it is a normally undefined ap-
plication)
• Clamp bolting for plastic pipe
• Connection set for rainwater utilisation systems for flexible, decoupled connection
• Ball valve with lever handle for easy and safe installation
The Wilo-RAIN3 rainwater utilisation system pumps rainwater from a rainwater storage
tank (e.g. ground reservoir) to the points of consumption. In the event of a low water level,
the system switches to a replenishment reservoir that is connected to the tap water supply.
The system complies with the EN 1717 standard.
The main applications are:
• WC (toilet flushing)
• Washing machines
• Garden watering/irrigation
• Sports ground irrigation
Check applications comply with local regulations.
Tank pre-pressure (nitrogen or
air) [with increased start-up pres-
sure in menu 1.04]
1.0 bar
DANGER
Health hazard due to contaminated water!
Industrial water is not drinking water. The water that flows through the
device is considered as non-drinkable, regardless of its origin.
• Attach "Not drinking water" sticker to the device so that it is clearly
visible.
• A direct connection between the tap water supply and the rainwater
extraction is not permitted.
Recommen-
ded setting in
menu 1.06
2.0 bar 30 s
[2.2 bar]
45 s
60 s
en
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