English (GB)
5
5. Product description
Fig. 1
Installation example
The Grundfos RCME rainwater system consists of a pressure-
boosting unit and a control cabinet with a Grundfos CU 372
control unit. The system also includes a Grundfos SB
submersible pump which functions as feed pump for the RCME
pressure-boosting unit. Install the feed pump in a rainwater
collecting tank.
The RCME unit incorporates back-up of mains water supply.
This function is automatically activated if the collecting tank is
emptied, for example during long periods without rain.
The RCME system is operated and monitored via the user-
friendly control panel on the CU 372 control unit that monitors and
controls the rainwater system.
The RCME system can communicate in many different ways, for
example with a building management system.
5.1 Overview of standard system components
The RCME system consists of the following main components:
Position numbers refer to fig.
, page 116.
• RCME 5-4 pressure-boosting unit
– CME 5-4 booster pump (pos. 19)
– non-return valve (pos. 9)
– buffer tank (pos. 22) with level sensor (pos. 5)
– integrated pressure vessel (pos. 21)
– mains water valve (pos. 12)
– steel base plate (pos. 18) with isolating valve (pos. 14)
• control cabinet with control unit (pos. 24)
• SB 3-45 submersible feed pump with floating suction strainer
(pos. 20)
• hydrostatic pressure sensor for collecting tank (pos. 8)
• flow sensor (pos. 7)
• discharge hose (pos. 15).
5.1.1 Options
The following options are available for the system:
• additional buffer tank
• additional SB 3-45 feed pump.
TM
05
95
81
44
13
11
10
8
6
5
1
2
3
9
7
4
9a
4a
Pos.
Description
1
Rainwater supply to buffer tank(s)
2
Mains water supply to buffer tank(s)
3
Control cabinet with CU 372 control unit
4
RCME pressure-boosting unit
4a
Additional buffer tank (option)
5
Rainwater supply pipe
6
Overflow to sewer
7
Rainwater filter unit
8
Rainwater supply to collecting tank
9
SB feed pump with floating suction strainer
9a
Additional SB feed pump (option)
10
Hydrostatic pressure sensor
11
Rainwater collecting tank
