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Wilo-Star-Z | Wilo
Your advantages
Wilo-Star-Z

Your advantages

  • AC pumps with electrical quick connection
  • All plastic parts that come into contact with the fluid fulfil KTW recommendations
Series description
Wilo-Star-Z

Design

Glandless circulator with threaded connection

Application

Domestic hot water circulation systems in industry and building services.

Equipment/function

Operating modes

  • Speed stage switching (Star-Z...-3 only)

Manual functions

  • Setting of the speed stages (1 speed stage, 3 speed stages with Star-Z...-3 pumps)

Equipment

  • Wrench attachment point on the pump body (Star-Z 25 only)
  • Cable inlet possible from both sides
  • quick connection with spring clips
  • Blocking-current proof motor

Typekey

Example:

Wilo-Star-Z 20/1

Star

Standard pump

Z

Circulation pump

20/

Nominal connection diameter

1

Nominal delivery head [m]

-3

3 speed stages

Technical data

  • Constant speed or, for Star-Z...-3, three selectable speed stages
  • Fluid temperature:
    • Drinking water up to 3.21 mmol/l (18 °dH): max. +65°C, in short-time duty (2 h) up to +70°C
  • Mains connection 1~230 V, 50 Hz
  • Protection class IP 44
  • Nominal diameter Rp ½ (¾), Rp 1
  • Max. operating pressure 10 bar

Materials

  • Pump housing: Bronze
  • Impeller: Plastic
  • Shaft: Oxide ceramic
  • Bearing: Carbon, synthetic resin impregnated

Scope of delivery

  • Pump
  • Gaskets for threaded connection
  • Installation and operating instructions

Accessories

  • Screwed connections
  • Adapter fittings
  • Thermal insulation shells for Star-Z 20, 25
  • Special brass inserted parts for screw-end pumps: Male thread/inner soldering connection
  • Wilo-S1R-h switchgear plug-in module for Star-Z 20/1, Z 25/2 EM (single-phase version)
  • Wilo-SK 601N switchgear in connection with Wilo-SK 602N (as contactor) for Star-Z 25/2 DM (three-phase version)
  • Wilo-SK 601N switchgear for timed On/Off switching for Star-Z 20, 25
Documents

Installation and operating instructions

Wilo-Star-Z/-ZD

Article Number 4236978
Edition 2019-08
Page format 105.1 x 148.2 mm
Number of pages 184
PDF (5 MB)

General overview

General Overview 2023 - International version

Edition 2022
Page format 209.9 x 297.0 mm
Number of pages 74
PDF (24 MB)

Certificate REACH

REACH Regulation

Edition 2021-05
Page format 209.9 x 297.0 mm
Number of pages 4
PDF (262 KB)