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CHAPTER 3 - INSTALLATION
DANGER
The installation operations must be performed by expert,
qualied personnel
Use specic guards and equipment as per safety
standards
Fully comply with safety and acci dent prevention
standards in force.
DANGER
Electric shock risk
Warns that the failure to follow the directions given may
cause electric shock.
3.1 HYDRAULIC CONNECTION
The system can be used with a direct connection to the aqueduct or suction from a first tank.
DANGER
For connection to the aqueduct, pay full attention to local
standards in force.
Check the sum of the intake pressure and the maximum
pressure of the motor pump do not exceed the maximum
values allowed by the system.
CMX
series electropumps are not self-priming. It is advis able to install it under the level of the water. If
the electropump is to be installed above the water le vel then a suction pipe should be used with a
diameter equal to that of the suction duct for electropump. If the height betw een the pump axis and
the minimum basin level is over 4 meters use a tube with a larger diamet er. The suction line should
be perfectly airtight. No elbows and/or slopes should be present to prevent the format ion of air locks
that could affect the electropump efficiency. A standing valve with filter should be fitted at about half a
metre below the fluid that has to be pumped on one end of the line.
Load losses can be reduced using delivery piping with a di ameter equivalent or greater than the
electropump mouth. It is advisable to install a check valve direct ly on the delivery line to prevent the
electropump being damaged by “water hammer”.
A cut-off valve should also be installed downstream from the check valve, to facilitate servicing ope-
rations.
Piping should be fitted so that vibrations, when existi ng, tension and weight do not affect the pump.
Piping should be routed along the shortest and straighter track, avoiding an ex cessive number of
bends.
3.2 PRIMING
DANGER
Never start the machine if it is not completely lled with
water.
3.2.1 NEGATIVE SUCTION HEAD
For negative suction head filling of a machine, proceed as follows:
• Close the gate on the delivery tubing
• Open the priming plug
• Slowly open the gate on the suction tubing
• When the liquid flows out of the prim ing plug continuously, tighten the plug.
• Fully open the gate on the de livery and suction tubing
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