General Information - Wilo Smart 25/4 Instrucciones De Instalación Y Funcionamiento

ENGLISH

1 General Information

Uses
The Wilo-Smart circulating pumps
are used to pump liquids in pipe
installations.
The pump must not be used
for handling drinking water
or food-related liquids.
Its main fields of application are:
– Hot-water
systems,
– Air-conditioning units and cold-
water distribution.
Rating plate
Heating circulating pumps,
wet runner motors
Screwed pipe pump
Nominal width [mm]
25 (=1HH),
Maximum delivery head [m]
Connection and electrical data
Connection voltage:
Insulation class:
Temperature class:
System of protection: IP 42
Differential pressure
range:
Fitting length
Perm. operating
pressure, max.:
Perm. medium
temperatures:
10
heating, various
Smart 25/4
1~230 V
±10%, 50 Hz
F (155°C)
TF95
3-channel
selector
switch
180 mm
10 bar
+2°C to
+95°C
Perm. ambient
temperature, max.:
Min. inlet pressure* at suction side
at
+82°C: 0.15 bar
+95°C: 0.3 bar
+110°C: 1.0 bar
* These values are valid up to 300
m above sea level. For higher ele-
vations add: 0.01 bar/100 m.
The minimum inlet pressure must
be maintained in order to avoid
cavitation noise!
Flow media:
– Heating water acc. to VDI 2035
– Water and water/glycol mixtures
in a ratio up to 1:1. In the case of
glycol admixtures the delivery
data of the pump is to be cor-
rected according to the higher
viscosity, depending on the per-
centage mixture
brand products with anti-corro-
sion inhibitors should be used.
The manufacturer's instructions
must always be strictly adhered
to.
– Clearance must be obtained
from WILO if other media are
used.
2 Safety
These instructions contain impor-
tant information which must be fol-
lowed when installing and opera-
+40°C
ratio. Only