Facility Requirements; Pump Location; Piping Requirements - Xylem LOWARA e-MPA Manual De Instalación, Funcionamento Y Mantenimiento

Grounding (earthing)
Electrical Hazard:

Always connect the external
protection conductor to ground
(earth) terminal before making
other electrical connections.

You must ground (earth) all
electrical equipment. This applies
to the pump equipment, the driver,
and any monitoring equipment.
Test the ground (earth) lead to
verify that it is connected correctly.

If the motor cable is jerked loose
by mistake, the ground (earth)
conductor must be the last
conductor to come loose from its
terminal. Make sure that the
ground (earth) conductor is longer
than the phase conductors. This
applies to both ends of the motor
cable.

Add additional protection against
lethal shock. Install a high-
sensitivity differential switch (30
mA) [residual current device RCD].
4.1

Facility requirements

4.1.1

Pump location

DANGER:
Do not use this unit in environments that
may contain flammable or explosive or
chemically aggressive gases or
powders.
Guidelines
Observe the following guidelines regarding the
location of the product:

Make sure that no obstructions hinder the
normal flow of the cooling air that is
delivered by the motor fan.

Make sure that the installation area is
protected from any fluid leaks, or flooding.

If possible, place the pump slightly higher
than the floor level.

The ambient temperature must be between
0°C (+32°F) and +40°C (+104°F).

Contact the Sales and Service Department
if:
–
The relative air humidity conditions
exceed the guidelines.
–
The room temperature exceeds
+40°C (+104°F).
–
The unit is located more than 1000 m
(3000 ft) above the sea level. The
motor performance may need to be
de-rated or replaced with a more
powerful motor.
–
For information about which value to
de-rate the motor with, see
Pump positions and clearance
Provide adequate light and clearance around the
pump. Make sure that it is easily accessible for
installation and maintenance operations.
Installation above liquid source (suction lift)
The theoretical maximum suction height of any
pump is 10.33m. In practice, the following affect
the suction capacity of the pump:






The following equation is used to calculate the
maximum height above the liquid level which the
pump can be installed:
(pb*10.2 - Z) ≥ NPSH
pb
NPSH
Hf
Hv
0.5
Z
For more information, see
NOTICE:
Do not exceed the pumps suction capacity as this
could cause cavitation and damage the pump.

4.1.2 Piping requirements

Precautions
NOTICE:
Observe all regulations issued by authorities
having jurisdiction and by companies managing
the public water supplies if the pump is connected
to a public water system. If required, install
appropriate backflow-prevention device on the
suction side.
Piping checklist
Table 9.
Check that the following requirements are met:


en - Original instructions
Temperature of the liquid
Elevation above the sea level, in an open
system
System pressure, in a closed system
Resistance of the pipes
Own intrinsic flow resistance of the pump
Height differences
+ Hf + Hv + 0.5
R
Barometric pressure in bar (in
closed system is system pressure)
Value in meter of the pump intrinsic
R
flow resistance
Total losses in meters caused by
passage of liquid in the suction
pipe of the pump
Steam pressure in meters that
correspond to the temperature of
the liquid T °C
Recommended safety margin (m)
Maximum height at which the pump
can be installed (m) (pb*10.2 - Z)
must always be a positive number.
Figure
WARNING:
 Use pipes suited to the maximum
working pressure of the pump.
Failure to do so can cause the
system to rupture, with the risk of
injury.
 Make sure that all connections are
performed by qualified installation
technicians and in compliance with
the regulations in force.
All piping is independently supported,
piping must not place a burden on the unit.
Flexible pipes or unions are used, in order
10.
19