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Star-Z 25/2

Name: Star-Z 25/2
Brand: Wilo
SKU: 4029062

Glandless pump circulator

Article number: 4029062

Series Star-Z

	Glandless standard high-efficiency pump	Glandless premium high-efficiency pump	Existing pump



Description
Product description	Yonos PICO-Z 25/0,5-4 180	Stratos PICO-Z 25/0,5-4	Star-Z 25/2
Article number	4255417	4255433	4029062
Series	Yonos PICO-Z	Stratos PICO-Z	Star-Z
Mains connection	1~230 V ±10%, 50/60 Hz	1~230 V ±10%, 50/60 Hz	1~230 V ±10%, 50 Hz
Pump connection	G 1½	G 1½	G 1½
Pump connection (alternative designation)	RP 1	RP 1	RP 1
	DN 25	DN 25	DN 25
Display	LED segment display	Graphic colour display (2 inches)	No display
Comment	Fits without modifications	Fits without modifications	-
Port-to-port length l0	180 mm	180 mm	180 mm
Operating data
Standard	-	-	-
Function
Control mode	Δp-c for constant differential pressure	Δp-c for constant differential pressure	-
	Constant speed (3 speed stages)	-	Constant speed (3 speed stages)
	Constant speed (n-const.)	Constant speed (n-const.)	-
	-	T-const. for constant temperature control	-
Special features of the series	-	Key locking function	-
	-	Reset function for electricity meter	-
	-	Reset function to factory setting	-
	-	Qmin for T const. control mode	-
	-	Automatic detection of thermal disinfection	-
Display	Actual volume flow	Actual volume flow	-
	Actual power consumption	Actual power consumption	-
	-	Setpoint	-
	-	Actual delivery head	-
	-	Energy consumption	-
	-	Actual speed	-
	-	Manually activated restart or pump venting function	-
	-	Warning messages in plain text (display status: yellow)	-
	-	Error messages in plain text (display: red)	-
	-	Control mode	-
	-	Active influences (e.g. STOP)	-
Pump venting function	Manual	Manual	-
Dry-running detection	-	yes	-
Equipment
Thermal insulation shell	Yes	Yes	-
Quick electrical connection	Wilo Connector	Wilo Connector	-
Blocking-current proof motor	-	yes	-
Key lock	-	yes	-
Operating elements	Green button	Green button and back button	-
Connectivity
Analogue signal as standard	-	0-10 V (via BMS Connect module accessories)	-
Digital output	-	SSM/SBM (via BMS Connect module accessories)	-
Digital input	-	Ext. OFF/Ext. MIN/ Ext. MAX (via BMS Connect module accessories)	-
Bus communication via additional accessories	-	Modbus RTU	-
Access via the Wilo-Assistant app	-	Via accessory Wilo-Smart Connect Module BT	-
wire data exchange and remote operation	-	Via accessories Wilo-Smart Connect Module BT	-
Motor data
Rated power P₂	15 W	15 W	32.5 W
Min. speed n_min	700 1/min	700 1/min	-
Max. speed n_max	3400 1/min	3400 1/min	2700 1/min
Power consumption P_{1 min}	4 W	3 W	-
Power consumption P_{1 max}	20 W	20 W	50 W
Emitted interference	EN 61000-6-3	EN 61000-6-3	EN 61000-6-3
Interference resistance	EN 61000-6-2	EN 61000-6-2	EN 61000-6-2
Electromagnetic compatibility	EN 61800-3	EN 61800-3	-
Insulation class	F	F	F
Protection class	IPX4D	IPX4D	IP44
Phases	1	1	1
Mains connection	1~230 V, 50/60 Hz	1~230 V, 50/60 Hz	1~230 V, 50 Hz
Materials
Impeller	PPO-GF30	PPO-GF30	PPE-GF30
Shaft	Oxide ceramic	Oxide ceramic	Oxide ceramic
Bearing	Carbon-graphite	Carbon-graphite	Carbon, synthetic resin-impregnated
Material	Stainless steel	Stainless steel	Bronze, CC499K
Pipe connection
Inlet connection	G 1½	G 1½	G 1½
PN connection on suction side	PN 10	PN 10	PN 10
Outlet connection	G 1½	G 1½	G 1½
PN connection on discharge side	PN 10	PN 10	PN 10
Dimension, weight
Length with packaging	194 mm	194 mm	147 mm
Length L	180 mm	180 mm	134 mm
Height with packaging	121 mm	121 mm	100 mm
Height H	115 mm	115 mm	94 mm
Width with packaging	213 mm	213 mm	187 mm
Width W	153 mm	164 mm	180 mm
Gross weight, approx. m	1.8 kg	2.1 kg	2.5 kg
Net weight, approx. m	1.5 kg	1.8 kg	2.4 kg
Ordering information
Product description	Yonos PICO-Z 25/0,5-4 180	Stratos PICO-Z 25/0,5-4	Star-Z 25/2
Brand	Wilo	Wilo	Wilo
EAN number	4062679265865	4062679266077	4016322364221
Article number	4255417	4255433	4029062

Data sheet

Hydraulic data
Maximum operating pressure PN	10 bar
Delivery head for Qmin H _Qmin	2.3 m
Max. volume flow Q_max	3.6 m³/h
Min. fluid temperature T_min	2 °C
Max. fluid temperature T_max	65 °C
Min. ambient temperature T_min	0 °C
Max. ambient temperature T_max	40 °C
Max. permitted total water hardness	3.21 mmol/l (18°dH)

Motor data
Mains connection	1~230 V, 50 Hz
Rated power P₂	32.5 W
Rated current I_N	0.22 A
Max. speed n_max	2700 1/min
Power consumption P_{1 max}	50 W
Emitted interference	EN 61000-6-3
Interference resistance	EN 61000-6-2
Protection class motor	IP44
Insulation class	F
Threaded cable connection	1 x PG11
Motor protection	no

Materials
Pump housing	Bronze, CC499K
Impeller	PPE-GF30
Shaft	Oxide ceramic
Bearing	Carbon, synthetic resin-impregnated

Installation dimensions
Port-to-port length L0	180 mm

Ordering information

Product data
Brand	Wilo
Product description	Star-Z 25/2
Article number	4029062
EAN number	4016322364221
Colour	Green
Minimum order quantity	1
Date of sales availability	1900-01-01

Packaging
Packaging type	Cardboard box
Packaging property	Sales packaging
Pieces per pallet	256
Number per layer	32

Dimension, weight
Length with packaging	147 mm
Length L	134 mm
Height with packaging	100 mm
Height H	94 mm
Width with packaging	187 mm
Width W	180 mm
Gross weight, approx. m	2.5 kg
Net weight, approx. m	2.4 kg

This circulator is suitable only for drinking water.

Domestic hot water circulator, constant-speed glandless pump 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 T_max	65 °C
Min. fluid temperature T_min	2 °C
Min. ambient temperature T_min	0 °C
Max. ambient temperature T_max	40 °C
Temperature range at max. ambient temperature +40 °C T	+2...+65 °C
Maximum operating pressure PN	10 bar
Max. permitted total water hardness	3.21 mmol/l (18°dH)

Motor data
Emitted interference	EN 61000-6-3
Interference resistance	EN 61000-6-2
Mains connection	1~230 V, 50 Hz
Power consumption P_{1 max}	50 W
Max. speed n_max	2700 1/min
Rated current I_N	0.22 A
Protection class motor	IP44
Threaded cable connection	1 x PG11

Materials
Pump housing	Bronze, CC499K
Impeller	PPE-GF30
Shaft	Oxide ceramic
Bearing	Carbon, synthetic resin-impregnated

Installation dimensions
Pump connection	G 1½
Pump connection (alternative designation)	RP 1 DN 25
Port-to-port length L0	180 mm

Ordering information
Brand	Wilo
Product description	Star-Z 25/2
Net weight, approx. m	2.4 kg
Article number	4029062

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Installation and operating instructions [1]

Group Statement [1]

UKCA [1]

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English [1]

language neutral [2]

Deutsch (German) [1]

Български (Bulgarian) [1]

Čeština (Czech) [1]

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Installation and operating instructions

Wilo-Star-Z/-ZD

Article Number	4236978
Issue date	2019-08
Edition	01
Language	ar, cs, de, el, en, es, fr, it, pl, ru, sv

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Group Statement

Group Statement REACH

Issue date	2021-05
References	REACH
Certification and inspection body	Self Declaration
Issue date	2026-04-17
Language	language neutral

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UKCA

UKCA 2223361-04

References	2223361-04
Certification and inspection body	Self Declaration
Issue date	2025-10-01
Language	language neutral

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