Wilo Wilo-Star-AC Series, Installation And Operating Instructions Manual

Page: 17 / 146

12
ENGLISH
Perm. operating
pressure, max.:
10 bar
Perm. medium
temperatures
min./max.:
-10/+110 °C
Perm. ambient
temperaturem max.:
+40 °C
Min. inlet pressure** at suction side
at
+ 50 °C: 0.05 bar
+ 95 °C: 0.3 bar
+ 110 °C:
1.0 bar
* For double pumps the additional
switchgear S2R 3D is required
for time-controlled main/reserve
or additional/peak-load operati-
on.
** The values are valid up to 300 m
above sea level. For higher ele-
vations add: 0.01 bar/100 m.
The minimim inlet pressure must
be maintained in order to avoid
cavitation noise!
Permissible fluids:
– Heating water acc. to VDI 2035
– Water and water/glycol mixtures
in a ratio up to 1:1. Glycol mixtu-
res require a reassessment of
pump hydraulic data in line with
the increased viscosity and
depending on mixing ratios. Only
approved makes of additives
with corrosion inhibitors must be
used in strict compliance with
manufacturers' instructions.
– For use of other kinds of fluids
consult WILO first.
2 Safety
These instructions contains basic
reference which must be strictly
adhered. It is therefore imperative
for the installer and operator to
carefully read these instructions
prior to installation and commissio-
ning.
Please observe, not only the safety
directions under the main heading
„safety rules“, but also those
added and specially marked under
the ensuing headers.
Safety marks contained in these
instructions
Safety rules contained herein
which, if not complied with, may be
dangerous to persons are specially
highlighted by the following danger
symbols:
Danger from electrical causes:
Safety references which, if not
complied with, may cause damage
to the pump / installation or impair
its functions are highlighted by the
word:
Staff training
The personnel installing the pump /
unit must have the appropriate
qualifications for this work.
ATTENTION!