Zilmet Expansion Vessel 13N Fagor FEB-24AR Ref. 537/L

Fagor boilers compatible with reference N40G003M0

Expansion vessel with reference N40G003M0. Four confirmed compatibilities: Supercompact FE-24E and FE24TC1N.

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. N40G003M0 is the part for your boiler

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

1. Find the reference printed on the installed part and check whether it matches the catalogue reference N40G003M0. If it is not visible, do not identify the part from 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 that require diagnosis in the expansion vessel N40G003M0

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

Common symptoms and faults

• 01

  The safety valve is leaking constantly, not just when the boiler is heating strongly.

  Cause: If the diaphragm of the expansion vessel is perforated or has lost gas, the circuit operates continuously near the triggering point of the gas valve.

  Measure the cold pressure on the manometer; if it is around or exceeds 2-2.5 bar without having touched the filling, the expansion vessel no longer dampens.

• 02

  The pressure in the system needs to be recharged every few days.

  Cause: A vessel without air precharge does not compensate for the expansion of water, and the system gradually loses pressure.

  Close the filling valve for a couple of days and check if the cold pressure continues to drop; this way you can rule out a leak in the circuit before touching the expansion vessel.

• 03

  It is necessary to bleed air or recharge the system more frequently than normal.

  Cause: When the vessel stops absorbing the expansion, the air and excess pressure seek an outlet through the bleed valves and the filling valve.

  Check that the automatic air vents on the radiators are not simply worn out or improperly closed before blaming the expansion vessel.

• 04

  The pressure gauge shows a different pressure when cold and hot, with a difference greater than usual.

  Cause: It is the most direct signal that the expansion vessel is no longer performing its function of cushioning the expansion of the water.

  Note the cold pressure and after 15-20 minutes of heating on; a significant difference between both confirms the expansion vessel.

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 Fagor expansion vessel N40G003M0

Catalogue reference

N40G003M0

Uniclima internal SKU

VECF24AR

Brand

Fagor

Type of part

Expansion vessels

Units in stock

4 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.

Maximum pressure

3 bar

Maximum temperature

90 °C

Capacity

7 liters

Series/family

13N

Dimensions

490 x 200 x 75 mm

Connection

3/8"