8
6. Operating conditions
1)
Applies to CH 2 and CH 4 pumps.
2)
Applies to CH 8 and CH 12 pumps.
3)
Applies to motor sizes of 0.37 kW and up to and including
0.75 kW.
4)
Applies to motor sizes of 1.1 kW and up to and including
5.5 kW.
7. Installation
Before installation, check the following:
•
that the booster set corresponds to order.
•
that no visible parts have been damaged.
7.1 Mechanical installation
7.1.1 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 booster set should be placed with sufficient clearance around
it for inspection and service.
7.1.2 Pipework
The pipes connected to the booster set must be of adequate size.
Connect the pipes to the manifolds of the booster set. Either end
can be used.
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 set is installed in a block of flats or the first consumer
on the line is close to the booster set, 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)
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 set 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 set from
"hanging" in the pipework.
7.1.3 Foundation
The booster set should be positioned on an even and solid
surface. If the booster set is not fitted with machine shoes, it must
be bolted to the floor.
7.1.4 Expansion joints
The purpose of expansion joints is as follows:
•
To absorb expansions/contractions in the pipework caused by
changing liquid temperature.
•
To reduce mechanical strains in connection with pressure
surges in the pipework.
•
To isolate mechanical structure-borne noise in the pipework
(only rubber-bellows expansion joints).
Fit the expansion joints at a distance of minimum 1 to 1 1/2 times
the nominal port diameter from the suction and discharge
manifolds. This prevents the development of turbulence in the
expansion joints, resulting in better suction conditions and a
minimum pressure loss on the discharge side.
The pipework should be anchored so that it does not stress the
expansion joints and the pump. Follow the supplier’s instructions
and pass them on to advisers or pipe installers.
Data
Pump type
CH
CR
Maximum flow rate
Up to 42 m
3
/h
Up to 69 m
3
/h
Maximum operating
pressure
10 bar
10/16 bar
Liquid temperature
+5 to +40 °C
1)
+5 to +55 °C
2)
+5 to +50 °C
Ambient temperature
+5 to +55 °C
+5 to +40 °C
3)
+5 to +60 °C
4)
Maximum suction lift = 10.33 m – NPSH of the pump –
other suction losses – a safety margin of 0.5 m
Power range
Up to 5.5 kW
Starting method
Direct on line (DOL)
Supply voltage
1 x 220 V ± 10 %, 50 Hz
3 x 400 V ± 10 %, 50 Hz
Relative air humidity
Max. 95 %
Enclosure class
IP54
Warning
Installation must comply with local regulations
and accepted codes of good practice.
Note
The Hydro Multi-S is not suitable for outdoor
installation and should be protected from
freezing and direct sunlight.
TM
03
97
13
43
07
Pos.
Description
1
Pipe support
2
Expansion joint
Note
The diaphragm tank, expansion joints, pipe
supports and machine shoes are not supplied
with a standard booster set.
Note
Expansion joints must not be installed to
compensate for inaccuracies in the pipework
such as centre displacement of ports.
1
1
2
