Junkers/Bosch Circulating Pump ZWE/ZWR/ZR Grundfos UPS 15-35/50 Ref. 8717204264
Grundfos UPS 15-35/50 JULA circulating pump used in Junkers/Bosch boilers from the ZWE, ZWR, ZR, and MINI-KE31 series. It circulates water through the heating circuit. It is replaced when it stops circulating, makes noise, or leaks water from the shaft. Grundfos code 8717204264, manufacturer P/N 59615536.
VAT included
Consult via WhatsAppJunkers boilers compatible with reference 8717204264
Circulating pump with reference 8717204264. 14 verified compatibilities: ZWE 24 and ZWE 24-1 ADE.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Junkers ZWE 24 | Eurostar (ZWE 24) | Contrasted |
| Junkers ZWE 24-1 ADE | Eurostar (ZWE 24) | Contrasted |
| Junkers ZWE 24-2 ADE | Eurostar (ZWE 24) | Contrasted |
| Junkers ZWE 24-2 KDP | Eurostar (ZWE 24) | Contrasted |
| Junkers ZWE 24-3 MFAD | Eurostar (ZWE 24) | Contrasted |
| Junkers ZWE 24-3 HKD | Eurostar (ZWE 24) | Contrasted |
| Junkers ZWR 18-2 KDE | ZWR (atmospheric mixed) | Contrasted |
| Junkers ZWR 24-2 ADE | ZWR (atmospheric mixed) | Contrasted |
| Junkers ZR 18-2 KDE | ZR (atmospheric heating only) | Contrasted |
| Junkers ZE 24-2 KDP | ZE / Cerastar (ZE 24) | Contrasted |
| Junkers ZE 24-3 MFKD | ZE / Cerastar (ZE 24) | Contrasted |
| Junkers MINI 11 KE | Mini / compact | Contrasted |
| Junkers ZBR 12 | ZBR (low condensation) | Contrasted |
| Junkers ZBR 25 A | ZBR (low condensation) | 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 ref. 8717204264 is the part for your boiler
What determines it is not the boiler model, but the reference printed on the part you already have installed.
- Find the reference printed on the installed part and check whether it matches the catalogue reference 8717204264. If it is not visible, do not identify the part from its shape alone.
- Check the full boiler model on its data plate and look for it in the model associations on this page.
- Compare the connections and physical body with the original part before installation.
- If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.
Symptoms and faults that the circulation pump 8717204264 solves.
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 boiler heats up but very slowly, or the radiators don't get fully hot.
Cause: If the flow moved by the pump is insufficient, the heat is not distributed at the rate required by the installation.
Check the speed at which the pump is configured and try increasing it before replacing it.
- 02
A humming, gurgling, or rattling noise is heard in the pump area.
Cause: Air trapped in the circuit or a worn bearing prevent the rotor from spinning smoothly and can be noticed as noise.
Bleed the highest radiator in the system and check if the noise disappears before considering the pump as faulty.
- 03
A drip or water stain appears on the casing or near the pump shaft.
Cause: The mechanical seal wears out over the years and allows a slow leak that is not related to nearby union gaskets.
Dry the area thoroughly, check after a heating cycle, and confirm that the water is coming from the pump body and not from a nearby joint.
- 04
The rotor is blocked and the pump does not start, even though it is receiving power.
Cause: It is typical after a long period of inactivity at the end of the season, because lime deposits on the shaft and seizes it up.
With the pump unplugged, try to free the shaft manually with a flat screwdriver through the front slot of the motor before replacing it.
Fault codes from Junkers that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| E9 | Temperature limiter (STB) activated due to overheating. | If the circulating pump is blocked, faulty, or has air, there is no circulation in the primary; the heat exchanger overheats and triggers the STB. Check that the pump is rotating and receiving voltage, and bleed the circuit to remove air pockets. |
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.
Data sheet for the Junkers 8717204264 circulation pump.
- Catalogue reference
- 8717204264
- Brand
- Junkers
- Type of part
- Pumps
- Units in stock
- 1 unit
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- 1-2 business days
- Return
- 14 days
Data read on the part and in the manufacturer's documentation
What we have not been able to verify does not appear here.
- type (Grundfos)
- UPS15-35/50 JULA
- Manufacturer P/N
- 59615536
- Grundfos code
- 8717204264
- manufacturing date (FD)
- 1802JU
- voltage
- 230V~
- frequency
- 50Hz
- capacitor
- 2µF
- degree of protection
- IP44
- maximum fluid temperature (TF)
- 95°C
- insulation class
- H
- maximum pressure
- 0.6 MPa
- absorbed power (2 speeds)
- 75 / 80 W
- current (2 speeds)
- 0.34 / 0.36 A
Frequently asked questions about the circulator pump 8717204264
How do I distinguish the UPS 15-35/50 JULA pump from the TTAO version for my Junkers ZWE24?
Is this pump suitable for the Junkers ZR18-2 boiler?
What is the manufacturer's P/N for the pump of the ZWE24 series?
When should the heating circuit pump of the ZWR18-2 be replaced?
Spare parts related to Junkers Eurostar (ZWE 24)
