Wilo ZRS15/4-1 Ku domestic hot water pump · Ref. 4521812
Domestic hot water pump Wilo ZRS15/4-1 Ku, reference 4521812. With a hydraulic body featuring two threaded connections, a 71 W motor, and a power supply of 230 V~ at 50 Hz.
- Type of part
- Circulator pump
- Status
- Refurbished
- Catalogue reference
- 4521812
- Warranty
- 1 year
Check the model and version before ordering
We retain associated models to help you find your appliance. The version and parts diagram must be checked before choosing this replacement.
Models pending verification
These models are associated with this reference, but we have not finished verifying them yet, so we do not consider them compatibleIf your boiler is one of them, send us a photo of the part you are going to replace and we will verify it before you purchase.
| Saunier Duval Isomax F35 | Saunier Duval | Unconfirmed |
|---|---|---|
| Saunier Duval Isotwin | Saunier Duval | Unconfirmed |
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 reference 4521812 is the part for your boiler
Compare the label and the hydraulic assembly before choosing the spare part.
- Check the model ZRS15/4-1 Ku and the codes 4521812 and 0020087506 on the label.
- The spare parts list for the Isomax C/F 28 E and E2 identifies 05738300 as the domestic hot water pump. Check the breakdown edition of your equipment.
- Check the two threaded outlets, the orientation of the body, and the electrical connection with the photographs.
- Inventory Alfonso notes Isomax F35 and Isotwin. Check the breakdown of the exact version before applying this reference.
- The photos in this sheet show the unit with PCB 4521812, code 0020087506, and marking 13W29. Definitive Inventory associates another unit Wilo ZRS15/4-1 Ku with PCB 4520265 and marking 09W30 to the same SKU. Both PCBs carry 4516125. Before purchasing, confirm which of the two PCBs corresponds to the available unit.
- Check the raised arrow next to the threaded connection with the hydraulic body of your pump.
Technical sheet: Saunier Duval 4521812 pump
- Catalogue reference
- 4521812
- Brand
- Saunier Duval
- Type of part
- Circulator pump
- Units in stock
- 7 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Depending on the country; cost shown at checkout
- Return
- 14 days
Part data and available documentation
Values on this unit’s original nameplate; the photographs retain its identifying details.
- Component manufacturer
- Wilo
- Model
- ZRS15/4-1 Ku
- Wilo reference
- 4521812
- Printed code on the unit
- 0020087506
- Spare part reference for verification
- 05738300
Saunier Duval parts diagram. - Power supply
- 230 V~ · 50 Hz
- Absorbed power P1
- 71 W
- Current
- 0.31 A
- Indicated speed
- 2100 min⁻¹
- Condenser
- 2 µF · 400 V DB
- Protection / nominal pressure
- IP44 · PN6
- Insulation class / temperature class
- F · TF95
- Additional marking on PCB
- 4516125
- Production marking
- 13W29
- Other markings on the PCB
- 1346715 · 90 1329 · 401891 · 004301 T7
Literal markings of the photographed unit. - Piece details
- Relief arrow next to a threaded connection
Visible in the enlargement of the hydraulic body.
Frequently asked questions: 4521812 circulator pump
What reference is listed in the parts breakdown of the Isomax C/F 28 E and E2?
How do I check the part?
