Sime PRAKTICA HE-25 circulator pump Wilo for INT KSL/7-50/IPWM1 Ref. 6330402
The Wilo circulator pump for INT KSL/7-50/IPWM1 (Sime 6330402, Wilo 4531985) moves the heating water between the boiler and the radiators. It is modulating: the boiler regulates its speed with iPWM control. It is confirmed for the Sime PRAKTICA HE-25 boiler. It is sold refurbished, tested, and with a 1-year warranty.
- Type of part
- Pumps
- Status
- Refurbished
- internal SKU
- BOM019
- Warranty
- 1 year
Compatible Sime boilers
Circulating pump. A proven compatibility: PRAKTICA HE-25.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Sime PRAKTICA HE-25 | Sime | Contrasted |
Can't see your model or have questions? The printed reference takes precedence. How to check it · Send us a photo via WhatsApp.
How to check if it is the part for your boiler
The part reference, model, and equipment revision must be verified against the manufacturer's documentation.
- Look for the code 4531985 on the Wilo head label, model Para INT KSL/7-50/IPWM1, and the data 1–50 W, 0.44 A, and 1~230 V. The Sime code 6330402 is printed in small on the same label.
- Check the rating plate to ensure your boiler is a Sime PRAKTICA HE-25. For any other model, please contact us at 911 17 77 77 before ordering it.
- Compare the complete code of your pump. 6272369, 6330401, 6281625, 6281624, 6272360, and 4530581 are different codes and we do not consider them equivalent.
- Compare the appearance with the photos: Wilo head with its label, gray connector at the bottom, and black plastic body with the markings C2 and C3.
- Remember that the pump activates itself every 24 hours if there has been no heating demand (boiler anti-blocking function): this is normal.
- Have a technician install it: it operates at 1~230 V and is part of the water circuit. The pump connectors depend on the boiler's serial number; check that yours fits.
Symptoms that require diagnosis in the circulation pump
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 pump starts on its own without a heat demand.
Cause: It is the anti-blocking function: the boiler activates the pump and the diverter valve every 24 hours if there has been no demand for heating. It is not a fault.
There is nothing to change.
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 sheet: Sime circulator pump
- Uniclima internal SKU
- BOM019
- Brand
- Sime
- Type of part
- Pumps
- Units in stock
- 1 unit
- 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.
- Reference
- 6330402 (Sime code)
- Wilo code
- 4531985
- Wilo model
- INT KSL/7-50/IPWM1
- Type
- Heating circulator pump, modulating (iPWM control)
- Casing
- KSL
- Power supply
- 1~230 V, 50/60 Hz
- Power
- 1–50 W
- Maximum current
- 0.44 A
- Energy Efficiency Index (EEI)
- ≤ 0,20
- Nominal pressure
- PN 6 (6 bar)
- Maximum fluid temperature
- 95 °C (TF95)
- Degree of protection
- IPX2D
- Status
- Refurbished and tested. 1-year warranty.
- Not valid for Sime Praktica HE 30: it has a circulator with a different code (6272369).
- Not valid for Sime BRAVAONE HE 25 ERP: it uses a circulator with a different code (6272360).
- Do not confuse with 6272369: Sime modulating circulator with another code. We do not consider it equivalent to 6330402. Compare your pump code and consult us if this is the one.
- Do not confuse with 6330401: Different Sime code. It is not interchangeable without consulting.
- Do not confuse with 6281625: Sime pump with a different code. It is not 6330402.
- Do not confuse with 6281624 · 6272360: Sime modulating pumps with another code. They are not 6330402.
- Do not confuse with 4530581: Different Wilo code. We do not consider it equivalent to 4531985; compare your pump code and consult us if this is the case.