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Star-Z 20/4-3 | Wilo
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Star-Z 20/4-3

Article number: 4081193
Technical data
Tender text

This circulator is suitable only for drinking water.

Domestic hot water circulator, glandless pump with manual three-stage variable speed control for pipe installation.

Blocking-current proof motor. Pump housing made of bronze, impeller made of fibreglass-reinforced plastic, ceramic shaft with resin-impregnated carbon friction bearings.

Operating Data
Max. fluid temperature Tmax 65 °C
Min. fluid temperature Tmin 2 °C
Min. ambient temperature Tmin 0 °C
Max. ambient temperature Tmax 40 °C
Temperature range at max. ambient temperature +40 °C T +2...+65
Maximum operating pressure PN 10 bar
Max. permitted total water hardness 3.21 mmol/l (18°dH)
Motor data
Interference emission EN 61000-6-3
Interference immunity EN 61000-6-2
Mains connection 1~230 V, 50 Hz
Power consumption P1 max 71 W
Max. speed nmax 1900 1/min
Rated current IN 0.31 A
Protection class motor IP44
Threaded cable connection 1 x PG11
Materials
Pump housing Bronze
Impeller PPE-GF30
Shaft Oxide ceramic
Bearing Carbon, synthetic resin-impregnated
Installation dimensions
Pipe connection on the suction side DNs G 1¼
Pipe connection on the discharge side DNd G 1¼
Port-to-port length L0 150 mm
Ordering information
Brand Wilo
Product description Star-Z 20/4-3
Net weight, approx. m 2.3 kg
Article number 4081193
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)

Certificate REACH

REACH Regulation

Edition 2021-05
Page format 209.9 x 297.0 mm
Number of pages 4
PDF (212 KB)
Services

With Wilo as your partner, you can not only be sure of choosing high-quality product solutions, but also of benefiting from a comprehensive, worry-free package of well thought-out services. We collaborate to develop a service concept tailored to your individual needs; with our expertise and personal consultancy, we make sure that the operation of your systems is as energy-efficient, reliable and economical as possible. All the while our competent Wilo service technicians are ready to assist you with fast, reliable and on-time support.

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Recommended services

Wilo-Live Assistant
Wilo-Live Assistant Service
    
2216415

The Wilo-Live Assistant is a technical advisor at your side during pump service. By using the Wilo-Live Assistant, our expert advisers can support you in the boiler or equipment room via video transmission – live and in real time. You use your smartphone to show the installation set-up, while the Wilo expert follows everything on their screen. They can see the components as well as other details and can thus determine where the fault or breakdown originates. We prevent downtime and ensure operational reliability of your pumps and systems!

The Wilo-Live Assistant includes:

  • Interactive live support via video chat
  • Direct contact with an expert
  • Just-in-time solution to ensure maximum operational reliability of your pumps and systems

More suitable services

Supervision
Supervision Glandless pumps
    
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Wilo supports during the concept phase to ensure quality work and cost efficiency. Our competent and qualified Wilo Service will support you with recommendations and technical advice throughout the entire project.

Supervision includes:

  • Regular on-site visits ensure the quality of information and advice
  • Technical consultancy, also available on site
  • Status report with recommendations after the visit
  • Comprehensive support from a Wilo expert
Commissioning
Commissioning Glandless pumps
    
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For perfect functioning of the pump(s) / system(s), it is recommended to have the commissioning carried out by the works' own WILO SE Customer Service Department. Optimum setting and efficient operation of the system are ensured as a result. Commissioning is comprised of the following points:

  • Commissioning of system(s) according to checklist
  • Parameterisation and setting of switchgear
  • Testing and adaptation of initial compressing of pressure tanks (filling up to 80 litres incl.)
  • Functional check of fitted system(s)
  • Practice-oriented operation instruction
  • Wilo commissioning protocol

The price for commissioning only applies to system(s) which have been installed in accordance with the installation and operating instructions and state-of-the-art technology. No costs for any materials which may be required are included.

Maintenance
Maintenance BASIC Glandless pumps
    
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In order to ensure and guarantee operational reliability of the pumps/systems, it is recommended to have regular and DIN-compliant inspections and maintenance carried out by the works' own WILO SE Customer Service Department. The tasks are carried out in accordance with DIN 31051 / DIN EN 13306. The tasks comprise the following points:

  • Visual inspection of the pumps/systems
  • Mechanical check
  • Electrical check
  • Testing pressure vessels that may be on hand
  • Review and, if necessary, adjustment of the system parameters
  • Creating a maintenance protocol

Scheduling and organisation is performed by WILO. Other individual maintenance offers are possible on request.

Maintenance COMFORT Glandless pumps
    
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In order to ensure and guarantee operational reliability of the pumps/systems, it is recommended to have regular and DIN-compliant inspections and maintenance carried out by the works' own WILO SE Customer Service Department. The tasks are carried out in accordance with DIN 31051 / DIN EN 13306. The tasks comprise the following points:

  • Visual inspection of the pumps/systems
  • Mechanical check
  • Electrical check
  • Testing and possible filling of pressure vessels that may be on hand
  • Review and, if necessary, adjustment of the system parameters
  • Creating a maintenance protocol
  • Consumable materials are included in the contract price
  • Elimination of payroll and travel expenses for deployments between maintenance intervals (during normal service hours)

Scheduling and organisation is performed by WILO. Other individual maintenance offers are possible on request.

Maintenance PREMIUM Glandless pumps
    
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In order to ensure and guarantee operational reliability of the pumps/systems, it is recommended to have regular and DIN-compliant inspections and maintenance carried out by the works' own WILO SE Customer Service Department. The tasks are carried out in accordance with DIN 31051 / DIN EN 13306. The tasks comprise the following points:

  • Visual inspection of the pumps/systems
  • Mechanical check
  • Electrical check
  • Testing and possible filling of pressure vessels that may be on hand
  • Checking the system parameters
  • Creating a maintenance protocol
  • Consumable materials are included in the contract price
  • Elimination of payroll and travel expenses for deployments between maintenance intervals (during and outside normal service hours)
  • Software updates
  • Includes wearing parts

Scheduling and organisation is performed by WILO. Other individual maintenance offers are possible on request.

Repair
Repair Glandless pumps
    
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Wilo Service draws on their competence and experience while consulting on site to decide whether the pump can actually be repaired on site or has to be sent in for a factory repair. Wilo also provides spare parts or a replacement pump to restore the operational reliability of the system.

Repair includes:

  • Verification and elimination of error causes by experienced Wilo experts
  • Non-binding estimate for repairs
  • Electric-hydraulic test run to ensure correct data regarding functionality, quality and performance of the pump or system
  • Coating of various pump or system components for an optimised efficiency factor
  • Use of genuine spare parts only
  • Documentation of the repair in the service report