Wilo-Star-Z 15 Installation and Operating Instructions
This document provides comprehensive instructions for the installation, operation, and maintenance of the Wilo-Star-Z 15 circulation pump. It is essential to read these instructions thoroughly before attempting installation to avoid risks of injury and damage to the unit.
Safety Information
About these instructions:
- Read these instructions completely before installation. Non-observance can lead to injury or damage.
- Pass on the instructions to the end user upon completion of installation.
- Keep the instructions near the pump for future reference.
- WILO accepts no liability for damage resulting from failure to follow these instructions.
Safety information is very important:
- Danger: Indicates a danger to life due to electrical voltage.
- Warning: Indicates a possible danger to life or injury.
- Caution: Indicates possible risks to the pump or other items.
- Note: Highlights tips and information.
Qualification: The pump may only be installed by qualified personnel. Electrical connection must be made by a qualified electrician.
Regulations
The following regulations must be observed:
- Accident prevention regulations
- DVGW worksheet W551 (in Germany)
- VDE 0370/part1
- Other local regulations (e.g., IEC, VDE, etc.)
Conversion, Spares, Transport
- The pump must not be technically modified or converted. Only use original spares.
- Unpack and check the pump and accessories upon receipt. Report any damage in transit immediately.
- Despatch the pump in the original packing only.
Power Supply
- Danger: Risk of electric shock. Switch off the power before working on the pump and ensure it cannot be switched on accidentally.
- Do not kink or nip the power cable or let it come into contact with heat sources.
- The pump has IP 42 drip-proof protection. Protect the pump against water spray. Do not immerse in water or other fluids.
Specifications
3.1 Type Key
| Series | Description |
| Star-Z | Standard drinking water circulation pump, glandless pump |
| 15 | Nominal width DN of the connecting pipe (mm) |
| A | with shut-off valves |
| C | with shut-off valves |
| Press | ready to connect with plug clock timer with Viega crimped connection |
3.2 Connections
- Star-Z 15: Screwed connection: 20 (Rp1″)
- Star-Z 15 A and Star-Z 15 C: Screwed connection: 20 (Rp1″) and shut-off valves
- Star-Z 15 APress: Viega crimped connection Ø 15
3.3 Data
| Star-Z 15 A and Star-Z 15 C | Star-Z 15 A Press | |
| Mains voltage | 1~230 V / 50 Hz | |
| Protection class | IP 42 | |
| Nominal width of connecting pipes | R 1/2 | Ø 15mm |
| Fitting length | 84 mm (type A 138 mm) | 166 mm |
| Maximum permissible operating pressure | 10 bar | |
| Permitted fluid temperature range | 20°C to 65°C, in short-term operation up to 2 hours: 70°C |
See name plate or Wilo catalogue for further information.
3.4 Scope of delivery
- Pump
- Thermal insulation shell
- Sealing rings
- Installation and operating instructions (not illustrated)
Principle of Operation
4.1 Application
The pump is intended for pumping drinking or process water in a circulation system.
4.2 Functions
- Timing function: The Star-Z 15 C version also has a cable connection with plug clock timer (See Page 20).
- Valves: The Star-Z 15 C, Star-Z 15 A and Star-Z 15 APress versions are equipped with a non-return valve (1) on the discharge side and with a stop valve (2) on the intake side.
- To replace the motor head (3), it is sufficient to close the stop valve at rotating slot (4). The motor head can then be simply unscrewed (See Page 19).
Installation
5.1 Mechanical Installation
- Danger: Before starting work, make sure that the pump has been disconnected from the power supply.
- Installation site: Provide a weatherproof, frost-free, dust-free and well-ventilated room for the installation. Choose an installation site that is easily accessible.
- Caution: Dirt can cause pump failure. Flush the pipe system before installation.
- Note: In the case of the Star-Z 15 C, Star-Z 15 A and Star-Z 15 APress versions, the stop valve and non-return valve are pre-installed. In the case of the Star-Z 15 version, these valves have to be installed.
- Prepare the installation site so that the pump can be installed without being exposed to mechanical stresses.
- Choose the right installation position – only as shown in (Fig. A). The arrow on the back of the housing indicates the direction of flow.
- Release the cap nut – unscrew it completely if necessary.
- Caution: Do not damage the housing seal. Replace damaged seals.
- Turn the motor head so that the cable screw connection points downwards.
- Caution: If the position is wrong, water can penetrate and destroy the pump.
- Tighten the cap nut again.
- Turn slot (1) with a screwdriver so that it is parallel to the direction of flow (only in the case of the Star-Z 15 C, Star-Z 15 A and Star-Z 15 APress versions).
- Note: To close, turn the slot so that it is across the direction of flow.
- Fit the thermal insulation shell.
- Connect the pipework.
- Caution: In the case of the versions with check valve and non-return valve, these are already pre-assembled with a tightening torque of 15 Nm (hand-tight). If the tightening torque is too high, this will destroy the valve screw connection and the O-ring. When installing the valve, use a wrench to prevent it from turning! In the case of the Star-Z 15 APress version, only use Viega pressure clamps. Other pressure clamps would destroy the pump.
5.2 Electrical Connections
- Danger: Only a qualified electrician is allowed to work on the electrical connection. Before making the connection, make sure that the connecting cable is dead.
- Install a permanent connecting cable with at 5-8 mm outside diameter with plug device or all-pole switch (with at least 3 mm contact opening width).
- Open the connection box.
- Guide the connecting cable through the cable connection and strip approximately 5 mm.
- Secure the cores with the cable clips: L phase, N neutral, ⏚ earth.
- Tighten the cable connection firmly.
- Close the connection box.
5.3 Filling and Ventilation
- Fill the system.
- The pump rotor space vents automatically after a short time in operation. The pump will not be damaged if it runs dry briefly.
5.4 Set the Time
The timer of the Star-Z 15 C versions can be set as follows:
- Turn the time selection wheel (1) in the direction of the arrow to set the current time.
- Switch the timer on (2) and off (3) on the time selection wheel as required.
Maintenance/Faults
To Clean
Clean the outside of the pump with a lightly moistened cloth only. Do not use detergents.
To Replace the Motor Head
- Warning: When removing the motor head or pump, hot fluid may spurt out under high pressure. Allow the pump to cool down beforehand.
- Close the stop valves before removing the pump (See Page 19).
- Replacing the motor head (See Page 19).
- Order the service motor from the trade.
Faults and Remedies
| Fault | Cause | Remedy |
| Pump does not start. | Interruption in the power supply, short-circuit or defective fuses. | Have the power supply checked by a qualified electrician. |
| Timing function has switched off automatically (Star-Z 15 C version only). | Check the plug clock timer setting. | |
| Motor is blocked, e.g., through deposits from the water mains. | Have the pump removed by a qualified person (See Page 19). Check that the impeller can move by turning it and rinse out the dirt that has accumulated. | |
| Pump makes noises. | Motor scraping, e.g., through deposits from the water mains | Check that the impeller can move by turning it and rinse out the dirt that has accumulated. |
| Running dry, too little water. | Check the shut-off valves, they must be fully open. |
Note: If you cannot remedy the fault, contact the trade.
Declaration of Conformity
WILO AG declares that the product series Star-Z 15 complies with the following relevant provisions in its delivered state:
- Electromagnetic compatibility – directive: 89/336/EWG (i.d.F./as amended/avec les amendements suivants: 91/263/EWG, 92/31/EWG, 93/68/EWG)
- Low voltage directive: 73/23/EWG (i.d.F./as amended/avec les amendements suivants: 93/68/EWG)
- Applied harmonized standards, in particular: EN 60335-2-51, EN 61000-3-2, EN 61000-3-3, EN 61000-6-2, EN 61000-6-4.
Dortmund, 08.12.2004
Erwin Prieß
Quality Manager
WILO AG
Nortkirchenstraße 100
44263 Dortmund
Wilo - International (Subsidiaries)
WILO AG
Nortkirchenstraße 100
44263 Dortmund
Germany
T +49 231 4102-0
F +49 231 4102-7363
www.wilo.com
Information on subsidiaries and representation offices in various countries is available, along with contact details and addresses, on the WILO website.
Wilo-Vertriebsbüros (Sales Offices)
Details of various sales offices within Germany (G1 Nord, G2 Ost, G3 Sachsen/Thüringen, G4 Südost, G5 Südwest, G6 Rhein-Main, G7 West) and contact information for Competence Teams (Gebäudetechnik, Kommune, Bau + Bergbau) and Customer Service are provided.
International sales offices and representation offices are also listed, with contact details for countries including Austria, Belgium, Bulgaria, Canada, China, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Great Britain, Greece, Hungary, Ireland, Italy, Kazakhstan, Korea, Latvia, Lebanon, Lithuania, Netherlands, Norway, Poland, Portugal, Romania, Russia, Saudi Arabia, Serbia and Montenegro, Slovakia, Slovenia, South Africa, Spain, Sweden, Switzerland, Taiwan, Turkey, Ukraine, United Arab Emirates, USA, Turkmenistan, and Uzbekistan.
Further addresses can be found at www.wilo.de or www.wilo.com.
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