Operation &
Maintenance Manual
Pump
RW
12/32
Edition 4
HSC
08-W36
782-001-GB
6.
INSTALLATION OPTIONS
For the submersible pump the following installations are
possible:
-H Stationary wet installation with a header coupling
type HK.
-V Stationary wet installation with a guide bar
quick release coupling type V.
-F Freestanding wet installation.
-T Transportable wet installation.
-A Stationary immersible installation.
6.1
INSTALLATION - H
Stationary wet installation with a ROBOT quick-release
header coupling type HK.
A flexible hose connects pump and coupling.
Most of the RW20 pumps (except types with a large
pumpcasing) will have a vertical position, see Fig. 6.1.
All RW 40 and RW60 pumps are horizontally placed,
see Fig. 6.2. Not available for RW80.
Except for the pump the following components are
necessary:
1. Hose connection, which is fastened to the
pump;
2. Flexible hose, between pump and coupling;
3. Header coupling, consisting of coupling
bend, rubber joint and a fixed coupling part;
4. Suspension bracket and chain, for lifting the
pump;
5. Level regulators for start-, stop- and alarm-
signals;
6. Suspension for level regulators and power
supply cable;
7. Piping, non return valve, bends etc.
Checkpoints before operating:
-
Ensure a good free passage beneath
the suction elbow of the pump
(at least the same as the suction diameter).
-
Adjust the start- and stoplevels in such a
way that the motor does not make more
than 20 starts per hour.
-
Check that the motor is adequately cooled.
The motorhousing should be at least 2/3 submerged
for continuous operation at full load (see Hmin.1
Fig. 6.1).
It is good practice, whenever possible to keep the
motorhousing completely under water.
For interrupted level controlled operation, less cooling is
required. We recommend not to run the pump with the
water level below the top of the volute in order to avoid
air being drawn in (see Hmin.2 Fig. 6.1).
Air in the discharge pipes might impair performance.
Fig. 6.1
Fig. 6.2
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