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
The 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
