DAB CM-G, Instruction For Installation And Maintenance

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ENGLISH
14
Check that the leakage of liquid
does not damage persons or things,
especially in plants that use hot
water. The system must be drained
only once the fluid temperature has
reached environment temperature.
Do not close the drainage cap until the pump is to be
used again.
When restarting after long periods of inactivity it is
necessary to repeat the operations described above in
the paragraphs
“WARNINGS” and “STARTING UP” .
12. MAINTENANCE AND CLEANING
As well as being at high temperature
and high pressure, the fluid in the
system may also be in the form of
steam! DANGER OF BURNING!
It may be dangerous even to touch the pump or
parts of the system.
The electropump can only be
dismantled by competent skilled
personnel, in possession of the
qualifications required by the
legislation in force.
In any case, all repair and maintenance jobs must be
carried out only after having disconnected the pump
from the power mains. Ensure that it cannot be switched
on accidentally.
If possible, keep to a maintenance schedule: expensive
repairs or machine down times can be avoided with a
minimum expense. During maintenance schedule
discharge the condensate, if necessary present into the
motor, through the hole, removing the exhaust port plug
no (electropumps with IP55 Degree of motor protection
only).
If the liquid has to be drained out
maintenance, ensure that the liquid
coming out cannot harm persons or
things, especially in using hot water.
The legal requirements on the disposal of any
harmful fluids must also be complied with.

In normal operation, the pump does not require any
kind of maintenance. However, from time to time it is
advisable to check the plate data, which will enable
you to have advance warning of any faults or wear.

After any operation involving the removal of the
motor head from the pump body, it is advisable to
change the O-ring between the pump body and the
support.
12.1 Modifications and spare parts
Any modification not authorized beforehand relieves
the manufacturer of all responsibility.
All the spare
parts used in repairs must be original ones and the
accessories must be approved by the manufacturer so as
to be able to guarantee maximum safety of persons and
operators, and of the machines and systems in which they
may be fitted.
12.2 Blanking flanges
For twin-head pumps, a blanking flange with a pump
housing gasket is available. See fig. 4
Fig. 4 Fitting the blanking flange
If one pump requires service, the blanking flange is fitted to
allow the other pump to continue operating.
13. TROUBLESHOOTING.
Fault Check (possible cause) Remedy
The motor does not start and makes
no noise.

Check the protection fuses.
If they are burnt-out, change them.

Check the electric connections.
If the fault is repeated immediately
this means that the motor is short
circuiting.

Check that the motor is live.
The pump supplies insufficient flow.

The impeller is worn or blocked.
Change the impeller or remove the
obstruction.

Check that the direction of
rotation on three-phase versions
is correct.
Invert the connection of two supply
wires.