Facility Requirements; Pump Location - Xylem Lowara ESH ATEX Manual De Instalación, Funcionamiento Y Mantenimiento

en - Original instructions
ground (earth) conductor is longer
than the phase conductors. This
applies to both ends of the motor
cable.
 Add extra protection against a
lethal shock. Install a high-
sensitivity differential switch (30
mA) [residual current device
RCD].
4.1 Motor (ATEX classification)
The pump without the motor is suitable for:

ambient temperature between -10°C
(+14°F) and +55°C (+131°F)

gas temperature class of T4 (+135°C =
+275°F)

gas explosion group of IIC
When you purchase a motor, check its ATEX
classification and combine it with the
classification of the pump.
Here some examples for informational
purposes only.

ambient temperature
–
Pump: -10°C to +55°C (+14 to
131°F)
–
Motor: 0°C to +40°C (+32 to 104°F)
–
Pump unit: 0°C to +40°C (+32 to
104°F)

gas temperature class
–
Pump: T4 (+135°C = +275°F)
–
Motor: T4 (+135°C = +275°F)
–
Pump unit:T4 (+135°C = +275°F)
–
Pump: T4 (+135°C = +275°F)
–
Motor: T6 (+85°C = +185°F)
–
Pump unit:T4 (+135°C = +275°F)

gas explosion group
–
Pump: IIC
–
Motor: IIC
–
Pump unit: IIC
–
Pump: IIC
–
Motor: IIB
–
Pump unit: IIB
4.2

Facility requirements

4.2.1

Pump location

DANGER:
Make sure that the supplied
equipment is suitable for use in the
classified area (according to Directive
1999/92/EC) and for the nature of any
flammable substances present (gas,
vapor, mist).
According to Directive 1999/92/EC,
Category 2 equipment is suitable for
use in Zone 1 and 2 areas only.
This equipment is:

not suitable for installation in sites
where the danger of explosion is
due to the presence of explosive
24
dust/air atmospheres.

for places with a potentially
explosive atmosphere, other than
underground parts of mines and
those parts of surface installations
of such mines endangered by
firedamp and/or flammable dust.
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 -10°C (+14°F) and +55°C
(+131°F).

The relative humidity of the ambient air
must be less than 95% at +40°C
(+104°F).
Contact Xylem or the Authorised Distributor if:

The relative air humidity conditions
exceed the guidelines.

The room temperature exceeds +55°C
(+131°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 Table 12.
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:

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

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 + Hf + Hv + 0.5
pb Barometric pressure in bar (in
closed system is system
pressure)
NPSH Value in meter of the pump
intrinsic flow resistance
Hf Total losses in meters caused by
passage of liquid in the suction
pipe of the pump
Hv Steam pressure in meters that