CIMM RP250 Expansion Vessel For Ferroli Bluehelix PRO 32C Ref. 39846070

Membrane expansion vessel manufactured by CIMM (model RP250 according to the label), with a capacity of 10 liters and a pre-charge pressure of 0.8 bar. It absorbs the expansion of the water in the heating circuit and maintains stable pressure. The replacement requires first confirming the fault of the part through technical diagnosis, even when it loses pre-charge, leaks, or the boiler needs to be re-pressurized frequently.

Type of part: Expansion vessels
Status: Refurbished
Catalogue reference: 39846070
Warranty: 1 year

VAT included Stock · 3 units

Compatibility

Ferroli boilers compatible with reference 39846070

Expansion vessel with reference 39846070. Nine confirmed compatibilities: Bluehelix Pro 25C and Bluehelix Pro 32C.

Proven compatibility

Boiler model	Family	Verification
Ferroli Bluehelix Pro 25C	Ferroli	Contrasted
Ferroli Bluehelix Pro 32C	Ferroli	Contrasted
Ferroli Bluehelix Pro S 27C	Ferroli	Contrasted
Ferroli Bluehelix Tech 25C	Ferroli	Contrasted
Ferroli Bluehelix Tech 35C	Ferroli	Contrasted
Ferroli Bluehelix Tech 18A	Ferroli	Contrasted
Ferroli Bluehelix Tech 25A	Ferroli	Contrasted
Ferroli Bluehelix Tech 35A	Ferroli	Contrasted
Ferroli Superlative Condens 25C	Ferroli	Contrasted

Can't see your model or have questions? The printed reference takes precedence. How to check it · Send us a photo via WhatsApp.

Guide

How to check if ref. 39846070 is the part for your boiler

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

Find the reference printed on the installed part and check whether it matches the catalogue reference 39846070. 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.

Diagnosis and fault codes

Symptoms that require diagnosis in the expansion vessel 39846070

The expansion vessel absorbs the expansion of water when heated. These are the typical symptoms and what to do:

Common symptoms and faults

01
You need to add pressure to the heating circuit more often than usual.
Cause: The vessel is losing air and cannot compensate for the expansion of the water, which causes the pressure to drop on its own.
With the boiler cold and without pressure in the circuit, check the valve of the expansion vessel to see if it maintains air pressure; if little or nothing comes out, that is the problem.
02
Water is coming out of the safety valve after a period of operation of the heating system.
Cause: If the membrane is not in good condition, the vessel cannot absorb the increase in volume of the hot water, which causes the pressure to rise and opens the gas valve.
Observe if the dripping occurs when the water is hot and stops when it cools down; that pattern indicates a problem in the expansion vessel, not in the gas valve.
03
There are knocks or noises in the pipes when the pump stops.
Cause: A vessel without air does not dampen the pressure spikes in the circuit, and these are felt as knocks.
Make sure that the shut-off valves are fully open and that there is no air in the radiators.

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

Ferroli Expansion Vessel Datasheet 39846070

Catalogue reference: 39846070
Uniclima internal SKU: VECBP32C
Brand: Ferroli
Type of part: Expansion vessels
Units in stock: 3 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.

model: RP250
capacity: 10 liters
Pre-charge pressure: 0.8 bar
Service temperature: +90°C / -10°C
Maximum pressure PS: 3.0 bar
Test pressure PT: 4.3 bar
CE Directive: 97/23/EC, EN13831, Category Art.3 Par.3, Fluid Group 2
Manufacturer address: CIMM S.p.A., Via Caprera 13, Castello di Godego (TV), Italy
DIN certco: 5C033/09

Frequently Asked Questions

Frequently asked questions about the expansion vessel 39846070

Is this CIMM RP250 expansion vessel compatible with the Ferroli Bluehelix Pro 32C?

Yes, the CIMM RP250 expansion vessel is compatible with the Ferroli Bluehelix Pro 32C, which is on the list of confirmed models.

What capacity and pre-charge pressure does the RP250 vessel have?

The CIMM RP250 expansion vessel has a capacity of 10 liters and a pre-charge pressure of 0.8 bar.

When should I replace the expansion vessel of the Bluehelix Tech 25C?

The technical diagnosis must confirm whether it is necessary to replace the expansion vessel when it loses pre-charge, leaks, or the boiler needs to be re-pressurized frequently.

How can I verify if this RP250 vessel is the correct one for my boiler?

You can verify it by checking reference 39846070 or code RP250 on your expansion vessel.

How many models are compatible with the expansion vessel CIMM RP250?

The CIMM RP250 expansion vessel is compatible with a total of 9 models from the Ferroli range.

What is the reference for the expansion vessel I need for the Ferroli Bluehelix Pro 32C?

VECBP32C is Uniclima’s internal SKU for locating this listing. To confirm compatibility, check the manufacturer’s reference and the exact appliance model.

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14-day return uninstalled parts

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CIMM RP250 Expansion Vessel For Ferroli Bluehelix PRO 32C Ref. 39846070