Wilo 4047573 - Page 32

Installation and operating instructions Wilo-Star-Z/-ZD 25
English
1)
The values apply up to 300 m above sea level; addition for higher locations:
0.01 bar/100 m increase in altitude. To prevent cavitation noises, be sure
to maintain the minimum inlet pressure at the suction port of the pump.
2)
For Star-ZD double pumps, a switchgear is required in addition for time-dependent
main/standby or parallel/peak-load operation.
5.3 Scope of delivery
• Complete circulation pump
•2 flat gaskets
• Installation and operating instructions
5.4 Accessories
Accessories must be ordered separately:
• Thermal insulation shell (for single pumps only)
• Screwed connections
• S1R-h plug-in module, only for blocking-current proof
1~types, not for Star-Z 25/6.
See catalogue for a detailed list
5.2 Technical data
Connection voltage 1 ~ 230 V ±10%
3 ~ 400 V ±10%
Mains frequency 50 Hz
Protection class IP See rating plate
Motor speed See rating plate
Water temperature at
max. ambient temperature +40 °C
+2 °C to +65 °C
Max. ambient temperature +40 °C
Max. operating pressure 10 bar (1000 kPa)
Minimum inlet pressure
1)
at +40 °C/+65 °C
0.05 bar/0.2 bar
(5 kPa/20 kPa)
Port-to-port length 140 mm/180 mm
Variable speed control
2)
3 stages