Wilo-Star-Z

Design type

Glandless circulation pump 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)

Automatic functions

• Time switching function for programming of 3 switch-on or switch-off times (Z 15 TT only)
• Temperature control for maintaining a constant return temperature in the domestic hot water circulation system (Z 15 TT only)
• Thermal disinfection routine (detection and support of thermal disinfection of the domestic hot water tank) (only Z 15 TT)
• Blocking protection (Z 15 TT only)

Signal and display functions

• LCD screen for display of pump data and fault codes (Z 15 TT only)

Equipment

• Wrench attachment point on the pump body (Star-Z 25 only)
• Cable inlet possible from both sides (Star-Z 20/..., Star-Z 25/... only)
• quick connection with spring clips
• Blocking-current proof motor
• Integrated non-return valve on the pressure side (only Star-Z 15 TT)
• Integrated ball shut-off valve on suction side (only Star-Z 15 TT)
• Including time switch (only Z 15 TT)

Scope of delivery

• Pump
• Gaskets for threaded connection
• Installation and operating instructions
• Thermal insulation (Star-Z 15 TT only)

Type key

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 or, for Star-Z 25/2 DM, 3~400 V, 50 Hz
• Protection class IP 44 (IP 42 for Star-Z 15 TT)
• Nominal diameter Rp ½, Rp 1
• Max. operating pressure 10 bar

Materials

• Pump housing:
• Brass: Star-Z 15
• Bronze: Star-Z 20, -Z 25
• Impeller: Plastic
• Shaft:
• Stainless steel: Star-Z 15
• Oxide ceramic: Star-Z 20, -Z 25
• Bearing: Carbon, synthetic resin impregnated