General; Safety; Fields Of Application; Product Information - Wilo Star-Z 20/1 Instrucciones De Instalación Y Funcionamiento

1. General

Installation and service by quali-
fied personnel only

1.1 Fields of Application

This circulator is suitable for drinking
water only. Series Star-Z circulating
pumps are suitable of handling liquids
in the fields of service/drinking water
and food-related liquids.

1.2 Product Information

1.2.1 Technical Data

Maximum working pressure: 10 bar
Minimum inlet pressure at suction port
at 40 °C: 0.5 bar (50 kPa)
at 65 °C: 0.2 bar (20 kPa)
Permissible temperature range of fluid:
Service water systems
+2°C up to + 65 °C
Maximum permissible ambient tem-
perature: 40°C.
Mains supply voltage: refer to name
plate.
Input power P : refer to name plate.
1
Max. motor speed: refer to name plate
Pipe connection size: (screw ended
pump)
Z 20/1: R 1 / , DN 15 (G: R 1)
2
Z 25/2: R 1, DN 28 (G: R 1
Z 25/6: R 1, DN 28 (G: R 1
ZD 25/6: R 1, DN 28 (G: R 1½)
The minimum inlet pressure at the
pump suction port must be maintained
to avoid cavitation noise.

2. Safety

These instructions contain basic refe-
rence to safety aspects which must
be strictly adhered to. It is therefore
imperative for the Installer and the
Operator to carefully read these
instructions prior to installation and
commissioning. Please observe, not
only the safety rules under the main
heading safety considerations, but also
those added and specially marked
under the ensuing headers.
2.1 Safety Symbols contained in
Safety rules contained herein which, if
not complied with, may be harmful to
persons are specially highlighted by
the following danger symbols:
Danger from general causes:
Danger from electrical causes:
Safety references which, if not com-
plied with, may cause damage to the
1
/ )
2
pump/plant or impair its function are
1 / )
2
highlighted by the word:
these Instructions
ATTENTION!
ENGLISH
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