General; Safety; Product Information; Technical Data - Wilo Star-Z 25/2 Einbau- Und Betriebsanleitung

1. General

Installation and service by quali-
fied personnel only
1.1 Fields of Application
Series Star-Z circulating pumps are
suitable of handling liquids in the fields
of service/drinking water and food-
related liquids.
The main fields of application are:
– Domestic and drinking water services.
– Cooling and chilled water circulating
systems.
– Closed industrial circulating systems.

1.2 Product Information

1.2.1 Technical Data

Maximum working pressure: 10 bar
Minimum inlet pressure at suction port
at 50 °C: 0.05 bar
at 95 °C: 0.3 bar
at 110 °C: 1.0 bar
Permissible temperature range of fluid:
Service water
systems
Z 20/1
Z 25/2 up to
Z 25/2 DM + 65 °C
Z 25/6
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
Z 25/2: R 1, DN 28 (G: R 1
Z 25/6: R 1, DN 28 (G: R 1
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 imper-
ative for the Installer and the Operator
to carefully read these instructions
prior to installation and commission-
ing. 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
Heating
systems
Safety rules contained herein which, if
not complied with, may be harmful to
– 10 °C...
persons are specially highlighted by
+ 110 °C
the following danger symbols:
Danger from general causes:
Danger from electrical causes:
ENGLISH
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these Instructions
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