Grundfos Hydro Multi-E Montage- Und Betriebsanleitung Seite 5

3. Product description
3.1 General description
Grundfos Hydro Multi-E booster systems are designed for the
pressure boosting of clean water in blocks of flats, hotels,
hospitals, schools, etc.
The Hydro Multi-E incorporates Grundfos CRE, CRIE, CME-A or
CME-I pumps fitted with frequency-controlled single- or
three-phase MGE motors and a breaker cabinet.
The Hydro Multi-E maintains a constant pressure through
continuously variable adjustment of the speed of the pumps
connected.
It adjusts its performance to the demand through cutting in/out
the required number of pumps and through parallel control of the
pumps in operation.
It performs automatic pump changeover according to the principle
"first in, first out" (FIFO).
The Hydro Multi-E has been factory-assembled and tested with
the control parameters mentioned in the quick guide supplied with
the booster system.
3.2 Functions
The Hydro Multi-E offers the following functions:
• Constant pressure.
• Stop at low flow.
• Cascade control of pumps.
• Manual operation, all pumps stopped or all pumps running at
maximum performance.
• Digital input for dry-running protection via level switch or
pressure switch.
• Emergency operation, if installed.
• Monitoring functions:
– dry-running protection (via digital input)
– motor protection
– bus communication
– sensor fault.
• Display and indication functions:
– green indicator light for operating indications and red
indicator light for fault indications
– potential-free changeover contacts for fault, operating or
ready signal
– yellow light fields indicating the setpoint set.
• Communication via the R100 remote control.
• Connection to bus and building management system via
Grundfos CIU units (CIU = Communication Interface Unit).
3.3 Hydro Multi-E
Diaphragm tank
Non-return
Pump
PUMP
valve
Pressure
PRESSURE
transmitter
TRANSMITTER
Fig. 1 Hydro Multi-E components
The breaker cabinet incorporates main switch and circuit
breakers.
Breaker cabinet
Isolating
NON-RETURN ISOLATING
valve
VALVE VALVE
Pressure gauge
PRESSURE GAUGE
4. Identification
4.1 Nameplate
The nameplate of the booster system is fitted to the base frame.
Fig. 2 Nameplate
Pos. Description
1 Type designation
2 Product number
3 Place of production (Grundfos company)
4 Production code (year and week)
5 Weight [kg]
6 Country of origin
4.2 Type key
Example Hydro Multi-E
Type range
Subgroup
Manifold material:
: Stainless steel
/G: Galvanised steel
Number of pumps: 2 or 3
Pump type
Supply voltage
/G 2 CRE 1-7 3 × 400/260 V
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