Wilo Yonos pump FOR SD15/6B PWM1 W MC · Ref. 4527535
Refurbished Wilo Pumps

Wilo Yonos pump FOR SD15/6B PWM1 W MC · Ref. 4527535

Price pending confirmation; please consult us before booking. It is a high-efficiency heating pump from the Wilo Yonos PARA family. It receives an external control signal: PWM1 corresponds to heating. Application confirmed for Saunier Duval Thema Condens 25-A (H-ES) R2, Thema Condens AS 30-A (H-ES), and Semia Condens 30-A; the code 0020199706 is not yet associated with a specific application here; SD15/6B remains as a variant without associated code or boiler.

Type of part
Pumps
Status
Refurbished
Catalogue reference
4527535
Warranty
1 year
VAT included OUT OF STOCK
Compatibility

Wilo boilers compatible with reference 4527535

Circulating pump with reference 4527535. Three verified compatibilities: Saunier Duval Thema Condens 25-A (H-ES) R2 and Saunier Duval Semia Condens 30-A.

Proven compatibility

Boiler modelFamilyVerification
Wilo Saunier Duval Thema Condens 25-A (H-ES) R2WiloContrasted
Wilo Saunier Duval Semia Condens 30-AWiloContrasted
Wilo Saunier Duval Thema Condens AS 30-A (H-ES)WiloContrasted

Can't see your model or have questions? The printed reference takes precedence. How to check it ·

Guide

How to check if reference 4527535 is the part for your boiler

The part reference, model, and equipment revision must be verified against the manufacturer's documentation.

  1. Look at the motor label: it should say Wilo Yonos PARA SD15/6B PWM1 W MC.
  2. Look for the code 0020199706 on the second label of the pump.
  3. Measure the distance between the outlets of your pump: this family has versions of 130 and 180 mm.
  4. This pump is confirmed for the Saunier Duval Thema Condens 25-A (H-ES) R2, Thema Condens AS 30-A (H-ES), and Semia Condens 30-A. If it is another model, please send us photos of your pump's label and the boiler's control board from the Contact section.
Diagnosis and fault codes

Symptoms that require diagnosis in the circulation pump 4527535

The circulation pump circulates the water in the heating circuit. These are the typical symptoms and what to do:

Common symptoms and faults

  • 01

    The radiators do not heat up even though the boiler turns on.

    Cause: Check the pressure on the manometer and bleed the air. If it remains the same, the pump may not be moving the water.

  • 02

    Noise or vibration in the pump area.

    Cause: Bleed the circuit, because the air also makes noise. If it continues, have a technician check the pump.

  • 03

    The pump does not start after the summer.

    Cause: The rotor may be stuck. A technician can try to free it before replacing it.

  • 04

    Water under the pump or at the base of the boiler.

    Cause: Dry the area and check if it starts to leak again from the pump body.

  • 05

    The boiler locks out due to lack of circulation.

    Cause: A technician must check if the pump receives voltage and the PWM signal from the boiler.

These symptoms can have more than one cause. If your boiler displays a fault code, send it to us via WhatsApp along with a photo of the labeling, and we'll tell you if this is the part.

Technical data

Technical sheet: Wilo 4527535

Catalogue reference
4527535
Uniclima internal SKU
15
Brand
Wilo
Type of part
Pumps
Units in stock
0 units
Status
Refurbished
Warranty
1 year
Shipping
Delivery time shown at checkout
Return
14 days

Part data and available documentation

Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.

Part reference
4527535
Control
PWM1 (external signal; heating logic)
Power supply
1~230 V, 50/60 Hz
Electric power
3-41 W
Maximum current
0.36 A
Degree of protection
IPX4D
Nominal pressure
PN6
Thermal marking
TF95
Material marked in subcomponent
PA66-GF30; PA
Other transcribed codes
1528723; 15W48; 90 1548; 0020199706; 495877; 046762 T4
Verified data — Pump
Wilo Yonos FOR SD15/6B PWM1 W MC
Verified data — Power supply
1~230 V · 50/60 Hz
Verified data — Power
3-41 W
Verified data — Maximum current
0.36 A
Verified data — Control
PWM1
Verified data — Protection
IPX4D
Verified data — Water temperature
Up to 95 °C (TF95)
Verified data — Nominal pressure
PN6 (6 bar)
Verified data — Efficiency (EEI)
≤ 0.21 (Part 3)
Verified data — Insulation class
Class F insulation in the Wilo Yonos PARA family
Verified data — Maximum height
Maximum height of 6.2 m in the 6 m models of the Wilo Yonos family.
Verified data — Maximum flow rate
Maximum flow rate of 3.3 m³/h in the Wilo Yonos family FOR
Verified data — Distance between outlets
130 or 180 mm depending on the variant (Wilo manual): measure your pump.
compatibility — Saunier Duval
Thema Condens 25-A (H-ES) R2
Technical sheet: Brand of the component
Wilo
Technical sheet: Complete type
Yonos FOR SD15/6B PWM1 W MC
Technical sheet: Spare part reference
4527535
Control
PWM1 (external signal; heating logic)
Technical sheet: Power supply
1~230 V, 50/60 Hz
Technical sheet: Electric power
3-41 W
Maximum current
0.36 A
Technical sheet: Degree of protection
IPX4D
Nominal pressure
PN6
Technical sheet: Thermal marking
TF95
Technical sheet: Marked material in subcomponent
PA66-GF30; PA
Technical sheet: Other transcribed codes
1528723; 15W48; 90 1548; 0020199706; 495877; 046762 T4
Before purchasing
  • Not compatible or excluded at source: ThemaFast Condens 25-A — It uses another one according to its official spare parts list: motor 0020207131
  • Do not confuse: Yonos FOR BXSL15/6B PWM1 W MC · 4527431. It is a variant of the same family associated with Baxi boilers; it has a different Wilo number and it is not listed as interchangeable.
  • Do not confuse: Yonos FOR FRSL15/6B PWM1 WM · 4527512 — Another variant of the same family — Another Wilo number; it is not stated to be interchangeable.
  • Do not confuse: 0020207131 is the pump motor for the ThemaFast Condens 25-A; it is a different code and does not appear to correspond to this pump.
  • Registered compatibility for Saunier Duval Thema Condens 25-A (H-ES) R2, Thema Condens AS 30-A (H-ES), and Semia Condens 30-A. The unit carries 0020199706 and the Wilo reference 4527535; the additional OEM correspondence of these codes with each boiler variant remains unclear. The unit data corresponds to its label and the family data to Wilo Yonos PARA.
Frequently Asked Questions

Frequently asked questions: 4527535 circulator pump

Is it compatible with my Saunier Duval Thema Condens 25-A (H-ES) R2?
Yes. Confirmation registered: this pump (Wilo Yonos PARA SD15/6B PWM1 W MC, ref. 4527535) for the Thema Condens 25-A (H-ES) R2. The Saunier Duval manual 0020238205_01 for the Thema Condens 25-A mentions a modulating pump, without providing its code. If your boiler is a different model, please send us a photo of its control board and the label of your pump from Contact.
Is it compatible with the Thema Condens AS 30-A (H-ES) or the Semia Condens 30-A?
Yes. Confirmation registered: this pump (Wilo Yonos PARA SD15/6B PWM1 W MC, ref. 4527535) for the Thema Condens AS 30-A (H-ES) and for the Semia Condens 30-A, as well as for the Thema Condens 25-A (H-ES) R2. Without additional external confirmation that we have read, it still cites the code 0020199706 alongside a boiler. If your boiler is a different model, please send us a photo of your pump's label and the boiler's control board from Contact.
What reference should I look for in my pump?
The model Wilo Yonos PARA SD15/6B PWM1 W MC and, on the second label, the code 0020199706. The Wilo reference for the part is 4527535, confirmed. This unit also has marked 1528723 and 15W48 and, on the second label, 90 1548, 495877 and 046762 T4: these are auxiliary markings, with no documented equivalence.
What does PWM1 mean in this pump?
The pump receives an external regulation signal from the boiler. In the Wilo Yonos PARA family, PWM1 is the logic for heating. This unit has the PWM1 control on the label.
Is another Yonos suitable for 15/6B with a different number?
We don't know. There are variants with other Wilo numbers, such as 4527431 or 4527512, and unconfirmed: that they are interchangeable. Compare the number on your label before purchasing.
Is it compatible with the ThemaFast Condens 25-A?
Their official spare parts list provides a different pump motor, the 0020207131. It does not indicate that this is the pump, so please consult us before purchasing it for that boiler.
Who should install it?
It must be installed by a qualified technician. The pump operates at 1~230 V, is part of the water circuit of the boiler, and receives the PWM1 signal from it. Before installing it, compare the model and the code 0020199706 and measure the distance between the ports: the family has variants of 130 and 180 mm.
Which boiler appears as compatible?
Saunier Duval Thema Condens 25-A (H-ES) R2.
What does PWM1 mean?
The pump receives an external signal; in the Wilo Yonos PARA family, PWM1 is the logic for heating.
What codes should be compared when identifying it?
The complete type Yonos PARA SD15/6B PWM1 W MC and the reference 4527535. The other codes are kept as auxiliary markings and are not interpreted as substitutions.

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Wilo Yonos pump FOR SD15/6B PWM1 W MC · Ref. 4527535