Operating Conditions; Installation; Mechanical Installation - Grundfos Hydro Multi-S Instrucciones De Instalación Y Funcionamiento

5. Operating conditions

Data
CM, CMV
Maximum flow rate Up to 45 m
Maximum operating
pressure
Liquid temperature +5 to +50 °C
Ambient
+5 to +60 °C
temperature
Maximum suction lift: 10.33 m minus NPSH of the pump minus
other suction losses minus a safety margin of 0.5 m
Power Up to 3.2 kW
Starting method
3 x 380-415 V, N, PE, 50 Hz
3 x 380-415 V, N, PE, 60 Hz
Supply voltage
1 x 220-240 V, N, PE, 50 Hz
1 x 220-240 V, N, PE, 60 Hz
3 x 208-230/440-480 V, N, PE, 60 Hz
3 x 208-230/440-480 V, PE, 60 Hz
Voltage tolerance
Relative air humidity
Enclosure class
1)
Applies to motor sizes of 0.37 kW and up to and including
0.75 kW.
2)
Applies to motor sizes of 1.1 kW and up to and including
5.5 kW.

6. Installation

Warning
Installation must comply with local regulations
and accepted codes of good practice.
Before installation, check the following:
• that the booster system corresponds to order.
• that no visible parts have been damaged.

6.1 Mechanical installation

Do not stand on the manifolds. This may cause
damage to the pump housing or leakage at all
Caution
joints.
6.1.1 Location
To ensure adequate cooling of motor and electronics, the
following must be observed:
• Place the Hydro Multi-S in such a way that adequate cooling is
ensured.
• Motor cooling fins, holes in fan cover and fan blades must be
kept clean.
The Hydro Multi-S is not suitable for outdoor
Note installation and should be protected from
freezing and direct sunlight.
The booster system should be placed with sufficient clearance
around it for inspection and service.
Pump type
CR
3 3
/h Up to 69 m /h
10 bar 10/16 bar
+5 to +50 °C
+5 to +40 °C
+5 to +60 °C
Up to 5.5 kW
Direct on line
Star-delta
3 x 380-415 V, PE, 50 Hz
3 x 380-415 V, PE, 60 Hz
3 x 220-240 V, PE, 60 Hz
3 x 440-480 V, PE, 60 Hz
1 x 220-240 V, PE, 60 Hz
+ 10 %/- 10 %
Max. 95 %
IP54
6.1.2 Prefilling of diaphragm tank
If a diaphragm tank is connected to the system, then prefill the
tank with nitrogen to a pressure of 0.9 x setpoint.
It is important to use nitrogen to prevent
Note
corrosion inside the diaphragm tank.
6.1.3 Pipework
The pipes connected to the booster system must be of adequate
size.
Connect the pipes to the manifolds of the booster system.
1)
Either end can be used.
2)
Apply sealing compound to the unused end of the manifold, and
fit a screw cap.
To achieve optimum operation and minimise noise and vibration,
it may be necessary to install vibration dampers.
Noise and vibration are generated by the rotations in motor and
pump and by the flow in pipework and fittings.
If a booster system is installed in a block of flats or the first
consumer on the line is close to the booster system, it is
advisable to fit expansion joints on the suction and discharge
pipes to prevent vibration being transmitted through the pipework.
Fig. 3 Example of installation with expansion joints and pipe
supports (Grundfos standard scope of supply in grey
colour)
Pos. Description
1 Pipe support
2 Expansion joint
The diaphragm tank, expansion joints, pipe
Note supports and machine shoes are not supplied
with a standard booster system.
Retighten all nuts prior to start-up.
The pipes must be fastened to parts of the building to ensure that
they cannot move or be twisted.
If the pump is to be operated with a suction lift, it is mandatory to
install a foot valve of adequate size.
If the booster system is installed on a base frame with vibration
dampers, expansion joints should always be fitted on the
manifolds. This is important to prevent the booster system from
"hanging" in the pipework.
1
1
2
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