Mody Pumps MSPG Series - Manual (Page 4)

2
After a long period of storage, the pump must
be inspected carefully. Rotate the impeller by
hand before start-up and check carefully
seals and cable entry
WARNING! Never start up the pump without
impeller. This will damage (in a few seconds)
the O-ring that seals between the rotor-shaft
and the sleeve of the mechanical seal
cartridge. Both sleeve and rotor shaft could
also be damaged due to excessive friction!
Installation
When installing the pump, reduce the risk of
accidents. Be aware that the machine is
extremely heavy and that it contains electrical
open wires.
Before starting the installation, check and
secure all screws for the lifting handle, stator
and volute fixing bolts. Ensure that these are
all safety tightened.
Lifting chains, cranes etc. must always be
designed to fully accommodate the weight of
the complete pump units. For safety reasons
never walk under suspended load.
Discharge base elbow - DBE
Place the
discharge base
elbow (DBE) at
the bottom of the
sump. If one
pump is installed,
place the pump in
the center of the
tank. Fit the guide
rails to the upper
guide rail bracket so the rails are accurately
located in vertical and parallel positions to
each other.
Connect the discharge pipe to the DBE. A
non return valve and gate valve sized
according to the flow velocity from the pump
are strongly recommended.
The lifting tackle must be installed directly at
the point above the center of gravity of the
pump for proper automatic coupling to and
release from the DBE, which is appropriately
designed for this purpose, when lifting and
lowering the pump from and to the DBE.
Dry pit installation
All MSP2 and
MSP3 modules
can be installed
dry with adjust-
able support legs
and a separately
supplied suction
elbow, or a fixed
suction base
elbow (SBE) unit.
Adjustable sup-
port consists of
three legs that are
telescopic in design. The suction pipe can be
connected in any direction by changing the
location of the legs. After elevation
adjustment, the legs are set and fixed by
two screws that lock the pump
arrangement into position. The bottom leg
pads can then be secure by bolting and
anchoring them in the concrete foundation.
The suction pipe is connected vertically to
the pump suction flange.
Note: The motor unit is easier to remove or
re-install if the suction pipe is equipped
with a drain valve. This can be opened
when the motor is going to be or removed
or reinstalled.
The discharge pipe should be equipped
with a drain valve as well, in order to bleed
air from the system during first start-up.
Afterwards this valve can be fitted with a
manometer to measure the discharge
pressure.
Before starting, carefully inspect the cables
for defects and check the level of coolant
in the cooling jacket.
Portable version / installation
This version needs
extra attention while
operating. The pump
can be supplied with
a support ring.
Place the pump on a
firm surface. Keep
the cables straight
and secure so that they cannot be nipped
or cut in any way.
WARNING! Never remove the support ring,
human contact might occur and make
injury.
If there is risk of overturning, place and fit
the pump on a steel plate.
When hoses are used as discharge
connection, remember that friction losses
are higher than in a pipe and flow may be
less than expected.
Electrical connections
The electrical installation must be
inspected by authorized electrician before
switching-on.
CAUTION! All electrical equipment must
always be earthed (grounded). This applies
both to the pump and to any monitoring
equipment.
Make sure that the electrical terminals and
starting equipment is installed in such way
that it cannot be flooded. The electrical
installation must apply to national and local
regulations.
All pumps are supplied with built-in thermal
switches in the stator windings. These are
marked F1, F2 on the control cable and
must always be connected in series to the
control circuit in the control panel.
The control cable marked D is connected
to the moisture sensors. This cable should
be connected to a conductive liquid level
relay in the control panel. An alarm should
be given in event of moisture intrusion.
Your local MODY representative can
supply you with the conductive liquid level
relay as an option.
Make sure that the power supply, voltage,
frequency and starting method
corresponds to the nameplate data fitted
on the pump.
The motor can operate by voltage
tolerances at +/- 10%. The motor might be
overloaded and burned out if this is
exceeded.
For power supply cable, and control cable
connections, refer to the motor winding
connection schematics in this manual.
• Direct online starting DOL
• Star-Delta starting Y-∆
Starting equipment in the control panel
must be provided with over current
protection sensitive to phase failure. A 3-
phase asymmetry control relay is
recommended, adjusted to 15% phase
asymmetry
The power supply should be fused with
low-blow fuses.
15 Starts per hour (regularly spaced) are
permitted
Replacing the power cable
If the cable has been compressed or
damaged it must be replaced to avoid
water entry.
When changing the cable always change
the rubber cable seal was well. Never
change cable dimensions from the original
cable or cable seal dimensions from the
original seal, as water may enter the motor
if these are not properly sized.
If the same cable is re-used due to any
repair work, always cut away a piece at the
cable entry in order to seal on a non
compressed cable sheath.
For safety reasons the grounded conductor
strand should always be longer than all the
other conductor strands. If the motor cable
is accidentally wrenched off, the grounded
conductor should be the last to break away
from its terminal. This applies to both ends
of the cable.
Electromagnetic Compatibility,
EMC
The pump does not generate any
electromagnetic (EMC) that would affect
other equipment. However, if the pump
power is supplied by a frequency inverter,
the power cables may require screening.
All MSP2 and MSP3 pump modules
comply with directive EN89/336/EEC
regarding EMC.