Hydraulic Component For Boilers ZWB7, ZWE24, ZWN And ZWR Ref. 87170021100

Junkers boilers compatible with reference 87170021100

Hydraulic group with reference 87170021100. Ten verified compatibilities: Eurostar ZWE 24-1 and Eurostar ZWE 24-2.

Proven compatibility

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. 87170021100 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.

1. Find the reference printed on the installed part and check whether it matches the catalogue reference 87170021100. If it is not visible, do not identify the part by its shape alone.
2. Check the full boiler model on its data plate and look for it in the model associations on this page.
3. Compare the connections and physical body with the original part before installation.
4. If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.

Symptoms and faults that the hydraulic group 87170021100 resolves.

The hydraulic group includes the valve, the by-pass, and the water connections. These are the typical symptoms and what to do:

Common symptoms and faults

• 01

  When opening the hot water, the boiler takes time to respond or does not ignite.

  Cause: The microswitch in this part notifies the control unit that there is a demand for hot water; if it does not function properly, the boiler does not receive the signal to start.

  Check the flow by opening the tap to the maximum: if it is below the minimum of the boiler, the microswitch may not activate even if the part is in good condition.

• 02

  The radiators heat up halfway while there is a demand for domestic hot water, or vice versa.

  Cause: The butterfly valve of this part diverts water between the heating circuit and the domestic hot water circuit; if it gets stuck halfway, it mixes both circuits.

  Move the control manually, with the boiler turned off and cold, to check that it rotates freely and without obstructions before replacing the part.

• 03

  A clicking or dry click sound is heard when opening and closing the hot water tap.

  Cause: It is the microswitch of the part activating; if the click does not occur, the electrical circuit does not send the command to the control board.

  Check that the connector of the micro switch is properly fitted and free of corrosion before considering the part faulty.

• 04

  Water leak around the brass fittings area when the boiler is running.

  Cause: The brass fittings of this part are the connection points with the piping; with pressure and use, they may lose tightness.

  Carefully tighten the accessible fittings and check the visible seals before deciding that the part is broken.

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 hydraulic group 87170021100

Catalogue reference

87170021100

Brand

Junkers

Type of part

Hydraulics

Units in stock

1 unit

Status

Refurbished

Warranty

1 year

Shipping

1-2 business days

Return

14 days