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In accordance with Directive 1999/92/EC, this
product is applicable for use in zone 1 and zone 2
areas only.
DANGER: Explosion/Fire Hazard
Special rules apply to installations in
explosive or flammable atmospheres.
Do not install the product or any
auxiliary equipment in an explosive
zone unless it is rated explosion-proof
or intrinsically safe. If the product is
EN/ATEX-, MSHA or FM-approved,
then see the specific EX information in
the Safety chapter before taking any
further actions.
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 the
motor fan deliver.
Make sure that the installation area is
protected from
flooding.
If possible, position the pump slightly
higher than the floor level.
The
ambient
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
Distributor if:
- The relative air humidity conditions exceed
the guidelines.
- The
room
temperature
(+131°F).
- The unit is located more than 1000 m (3000
ft)
above
the
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 8 on page 94.
Pump position and clearance
Provide adequate light and clearance around the
pump. Make sure that it is easily accessible for
installation and maintenance operations.
Installation above a liquid source (suction lift)
The theoretical maximum suction height of any pump
is 10.33 m. In practice, the following affect the
suction capacity of the pump:
Liquid temperature
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
any fluid leaks, or
temperature
must
or
the
Authorised
exceeds
+55°C
sea
level.
The
motor
The following equation is used to calculate the
maximum height above the liquid level which the
pump can be installed:
*10.2 - Z) ≥ NPSH + H
(p
b
p
Barometric
b
pressure).
NPSH
Value in meter of the pump intrinsic flow
resistance.
H
Total losses in meters caused by passage
f
of liquid in the suction pipe of the pump.
H
Steam pressure in meters that correspond
v
to the temperature of the liquid T °C.
0.5
Recommended safety margin (m).
Z
Maximum height at which the pump can be
installed (m).
(p
*10.2 - Z) must always be a positive number.
b
For more information, see Figure 9 on page 95.
NOTICE:
Do not exceed the pumps suction capacity as this
could cause cavitation and damage the pump.
4.2.2
Piping requirements
be
Precautions
WARNING:
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
Check that the following requirements are met:
All piping is independently supported,
piping must not place a burden on the
unit.
Flexible pipes or unions are used, in
order to avoid transmission of pump
vibrations to the pipes and vice versa.
Use wide bends, avoid using elbows
which cause excessive flow resistance.
The suction piping is perfectly sealed and
airtight.
en - Original instructions
+ H
+ 0.5
f
v
pressure
in
bar
Use pipes suited to the
maximum
pressure of the pump.
Failure to do so can cause
the system to rupture, with
the risk of injury.
Make
sure
that
connections are performed
by
qualified
installation
technicians
and
compliance
with
regulations in force.
(system
working
all
in
the
21
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