Pipework; Additional Feed Pump; Additional Buffer Tank; Electrical Installation - Grundfos RCME Notice D'installation Et De Fonctionnement

7.3 Pipework

All external pipes must be properly supported
Caution
before they are connected to the RCME unit to
ensure that the internal pipework is not stressed.
A non-return valve is fitted on the booster
pump discharge manifold, see pos. 9 on fig. 2,
page 116.
Note
All pipework subject to freezing conditions must
be adequately insulated and heat-traced if
necessary.
7.3.1 Rainwater inlet pipe from collecting tank
For thread size and location, see fig. 1, page 115, and fig. 3,
page 116.
7.3.2 Mains water supply pipe and flow sensor
Position numbers refer to fig. 2, page 116.
Mount the flow sensor (pos. 7) in the mains water inlet pipe
according to the guidelines described in the instructions delivered
with the flow sensor.
7.3.3 Discharge pipe
Position numbers refer to fig. 2, page 116.
Connect the discharge hose (pos. 15) between the booster pump
discharge manifold and the isolating valve (pos. 14).
Connect piping from the building to the isolating valve. For thread
size see fig. 3, page 116.
7.3.4 Overflow
Lead the overflow to a sewer via a funnel to ensure that there is
an air gap between the buffer tank and the pipe leading to the
sewer. See fig. 7.
Example of overflow arrangement
Fig. 3

7.4 Additional feed pump

Install an additional feed pump so that it pumps rainwater into the
same supply pipe as the other feed pump. See

7.5 Additional buffer tank

Install an additional buffer tank by connecting it to the main buffer
tank. See fig. 4.
Fig. 4

8. Electrical installation

Caution

8.1 Electrical connection

The following connections must be made before the system can
be commissioned.
8.1.1 Connection of power supply
Caution
Connect the power supply as shown in the wiring diagram
supplied with the control cabinet.
8.1.2 Connection of hydrostatic pressure sensor for
Fig. 1, page 5.
collecting tank
Connect the supplied hydrostatic pressure sensor as shown in
the wiring diagram supplied with the control cabinet.
Enter the tank depth and desired low-level limit for the collecting
tank in display 4.1. See section
8.1.3 Connection of feed pump
Connect the feed pump as shown in the wiring diagram supplied
with the control cabinet.
8.1.4 Connection of flow sensor
Connect the flow sensor as shown in the wiring diagram supplied
with the control cabinet.
A
Connection pipe (A) installed between main buffer tank
and additional buffer tank
Warning
The electrical connection must be carried out in
accordance with local regulations.
Before making any connections to the unit or the
feed pump, switch off the power supply, and
make sure that it cannot be accidentally switched
on.
We recommend fitting an earth leakage circuit
breaker (ELCB) to the incoming power supply.
Check that the RCME unit and feed pump are
suitable for the power supply at the installation
site.
All electrical connections must comply with
enclosure class IP54.
Check that the conductor cross-section of the
power supply cable used is suitable for the
maximum current (I ) stated on the nameplate
max
of the RCME unit.

15.1 Tank settings

(4.1).
7