Accessories; Assembly/Installation - Wilo Rain-Collector II Einbau- Und Betriebsanleitung

ENGLISH
The unit (fig. 1) consists of a reservoir (pos. 1) to catch the rain-
water from house roofs and secure surfaces. The reservoir
consists of opaque (black) polyethylene as light protection
against the formation of algae. A self-priming centrifugal pump
(pos. 2) supplies the individual points of consumption via a
separate system of pipes.
At the bottom of the reservoir is a small internal cistern (pos. 3),
that can be filled with tap water if the reservoir is empty due to
a lack of rain. Therefore, only as much fresh water flows in as is
currently being used. Both rainwater and fresh water are pri-
marily taken from the small cistern. Above ground level in a
side wall of the small cistern is a hole with a flap trap, through
which the rainwater flows when the tank is being filled first from
the large into the small cistern. The flap trap prevents the water
from flowing back into the large cistern. The small tank is open
at the top. If the rainwater level in the large tank increases furt-
her the small tank is filled from above.
The electronic control system Wilo-Fluidcontol (fig. 1, pos. 4)
allows the Wilo Rain Collector to operate automatically. It is
screwed into the compressed-air pipe.
The signal and operating elements are located on the control
unit cover (fig. 2). When ready to run, with closed tapping
points and at maximum operating pressure, the pump is swit-
ched off. The green LED on the operator's panel is lit (pos. 1). If
a bleeding point in the system is opened, a magnetic switch is
opened by the flow of water and as a result the pump is swit-
ched on. The yellow diode (pos. 7) lights up to show the pump
is operating. When no more water is taken from the system, the
flow stops and the pump is switched off. The cut-out pressure
is set at 2.2 bar.
If the pump is no longer pumping after 6 seconds despite
being asked to do so (unsubmerged or leaky suction pipe,
problem in the pump), the pressure in the control unit drops
until another magnetic switch switches the pump to fault after a
delay of 8 seconds. The red error LED (pos. 9) lights up. At the
same time a low water level cut-out warning is given. A safety
valve (pos. 10) prevents any unauthorised increase in pressure
in the system as a result of damage to the diaphragm in the
control unit.
Do not touch the safety valve!
A non-return device is also built into the control unit device, so
that the compressed-air pipe does not drain when the pump is
not operating.
In addition to the mains and pump connection, the switchbox
also houses the electronics.
The signal/operating elements on the switchbox cover are (fig.
2):
– green LED: mains voltage on, ready for operation,
– yellow LED: pump operating,
– red LED: fault, including everything that leads to a loss of
pressure in the system,
– Fault acknowledgment button (reset). Once the fault has
been rectified the reset button must be held down until the
pressure has built up in the system. This also applies to run-
ning in. Otherwise the pump immediately switches back to a
fault status if the pressure is insufficient.
– ON switch
On 2 opposite sides of the dome opening there is a DN 100
connecting sleeve (fig. 1, pos. 7) for an overflow pipe, which
must be installed. The overflow pipe must be connected to the
channel below the discharge level of the lowest bleeding point.
At the bottom of the cistern it is possible to connect an add-on
kit on both the left and right to increase the storage volume.
8
The DN 100 connecting sleeves are closed with elastic cowls
(fig. 1, pos. 8).
The Wilo Rain Collector is available in 3 variants:
– RWN 1500: Standard design as described above.
– RWN 1500 A: Automatic design. An electrovalve (fig. 1, pos.
9, closed in the event of a power cut), that is driven by a WAO
65 float switch in the internal cistern in the event of a lack of
rainwater, is connected to the drinking water mains for the
automatic supply of fresh water. The fresh water is fed to the
internal cistern via a funnel (fig. 1, pos. 10) and a DN 50 inlet
pipe. The float valve prevents the internal cistern from over-
flowing.
To allow uninterrupted operation, it must be ensured that the
quantity of inflowing water is greater than the quantity of
water removed when fed exclusively with fresh water.
– RWN 1500 AU: Automatic design if the RWN unit is installed
below the reflux level (generally at street level). In this version
the rainwater is also fed into the tank from above through a
2HH pipe. A float valve closes the inlet when the tank reaches
its maximum level. DIN 1986, Part 1 stipulates that the over-
flow pipe described above be installed. In this case the over-
flow pipe must open into a run-off point. If e.g. this soakaway
cannot carry sufficient quantities of overflowing rainwater, a
submersible motor-driven pump should also be installed,
whose pressure pipe opens into the channel. The pressure
pipe is to be fitted with a flap trap. To ensure the float valve
operates perfectly, the rainwater is to be cleaned by means
of a filter collector.
4.2 Products delivered
– Wilo-Rain-Collector complete,
– for the RWN 1500 A and AU units: electrovalve (fi ) for fresh
water infeed,
– Installation and operating instructions
4.3

Accessories

Accessories must be ordered separately.
– Filter collector for the fine-filtering of the rainwater directly in
the downpipe,
– Duo-filter for filtration in horizontal collector pipes,
– Warning signs „Attention! Not drinking water!",
– Add-on kit 1700 L.

5 Assembly/Installation

5.1 Assembly
– The unit is to be installed in a dry, cool place safe from frost.
The unit is not suitable for installation in the open.
– The cistern is to be installed on a level, stable base.
– Unit dimensions see fig. 4.
– When installing the unit allowance must be made for suffi-
cient floor-to-ceiling height to allow access to the unit for
inspection purposes.
– Connect pressure pipe R 1HH off-circuit to the pump's pressu-
re pipe connection.
– If the height of the water column between the pump and the
highest bleeding point is more than 15 m, the Fluidcontrol
control unit must be positioned higher in the pressure pipe
so that the height difference of max. 15 m is maintained. At
the same time, however, you must not install a bleeding point
below the WILO Fluidcontrol (fig. 6).
– The Wilo Fluidcontrol must not be exposed to external tem-
peratures outside the range +4 °C to +50 °C.
– Prepair rainwater inlet and overflow pipe with HT DN 100
pipes. The HT bend on the cistern supplied is freely sleewa-
ble. The corresponding connecting sleeve (on the side of the
dome) for the overflow pipe is to be cut open. The weight of
the piping is to be supported. There must be no forces acting