Immergas Eolo Mini 28 Export OTMA OTSL 15/5-3 C Circulating Pump Ref. 3.017103

Hydraulic set with circulating pump OTSL 15/5-3 C, Immergas code 3.017103. The pump circulates the water from the heating circuit through the boiler. It is compatible with the Immergas Eolo Mini 28 Export. It is sold refurbished, tested, and with a 1-year warranty.

Type of part: Pumps
Status: Refurbished
internal SKU: HID039
Warranty: 1 year

VAT included Stock · 2 units

Compatibility

Immergas compatible boilers

Circulating pump. A proven compatibility: Eolo Mini 28 Export.

Proven compatibility

Boiler model	Family	Verification
Immergas Eolo Mini 28 Export	Immergas	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 it is the part for your boiler

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

Locate the white label of the assembly on the black cover of the motor. This part has 3.017103 KW28 and the article code 10037608102500.
Look at the label of the pump, on the silver side with the Immergas logo. It should say OTSL 15/5-3 C.
Compare the three speeds on that label: 40, 62, and 83 W; 0.18, 0.27, and 0.36 A; 1600, 2000, and 2200 min⁻¹. Also check 230 V · 50 Hz, 2.6 µF · 400 V, PN6, and IP44.
Check the exact model of your boiler on the rating plate. The part is confirmed for the Immergas Eolo Mini 28 Export.
Decide if you need the complete set (body with the pump mounted) or just the loose pump, which has a different code.
If you have any questions, send us a photo of your part's label and the boiler's PCB from the Contact section, or call us at 911 17 77 77.

Diagnosis and fault codes

Symptoms that require diagnosis in the circulation pump

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 radiators are cold even though the burner ignites.
Cause: The pump may not be circulating water in the circuit.
Check that the pump is running and that the boiler has pressure.
02
Noise or buzzing when requesting heating.
Cause: There may be air in the circuit or the rotor may be rubbing.
Bleed the radiators and check the pump.
03
The pump buzzes but does not spin after the summer.
Cause: The rotor may be stuck due to limescale or dirt.
Have it checked by a qualified technician.
04
It leaks water from the body or from the connections.
Cause: The seals or the hydraulic body may be damaged.
Check the gaskets and the hydraulic body.
05
The boiler locks out or shuts down due to overheating.
Cause: There may be a lack of water circulation.
Check that the pump is working and that there are no closed valves in the circuit.

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

Technical sheet: Immergas circulator pump

Uniclima internal SKU: HID039
Brand: Immergas
Type of part: Pumps
Units in stock: 2 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.

Reference: 3.017103
Type of part: Hydraulic set with circulation pump
Brand of the spare part: Immergas
Manufacturer of the assembly: O.T.M.A.
O.T.M.A. article code: 10037608102500
Designation on the assembly label: 3.017103 kW28 · SX
Mounted pump: OTSL 15/5-3 C
Codes marked on the pump: 4514836 · 4514868 · 21000606500800
Speed I: 40 W · 0.18 A · 1600 min⁻¹
Speed II: 62 W · 0.27 A · 2000 min⁻¹
Speed III: 83 W · 0.36 A · 2200 min⁻¹
Power supply: 230 V · 50 Hz
Condenser: 2.6 µF · 400 V
Protection: IP44 · class F · type B
Water temperature: Up to 95 °C (TF95)
Nominal pressure: PN6
Body: SIT 451 858 04 marking · SX configuration

Before purchasing

Not valid for Immergas Eolo Mini 28 kW (CE version): it has a different pump group (3.016686).
Do not confuse with 3.019394: OTSL 15/5-3 C circulator loose, without the hydraulic body. Another code: this part is the assembly with the pump mounted.
Do not confuse with 3.017105: Pump assembly of the Immergas Eolo Mini 28 Export. Another code: this hydraulic assembly is not it.
Do not confuse with 3.016697: Pump assembly of the Immergas Eolo Mini 28 Export, without serial number. Another code: this hydraulic assembly is not it.
Do not confuse with 3.016097: Another hydraulic set of the same boiler. Another code: it is not 3.017103.
Do not confuse with 3.016686: Pump group from another version of the boiler. Another code: this set is not it.
Do not confuse with OTSL 15/5-3-CRF9 (95262372): Pump kit for Unical boilers. Another code and another boiler brand.
Do not confuse with Wilo RS 15/5-3 KU P: Wilo circulator with a similar name. Another model: it is not the OTSL 15/5-3 C.
Please consult us before purchasing if your boiler is: Immergas Eolo Extra 24 kW.

Frequently Asked Questions

Frequently asked questions about the circulation pump

Is it compatible with my Immergas Eolo Mini 28 Export?

Yes. This hydraulic assembly with code 3.017103 is compatible with the Immergas Eolo Mini 28 Export. If your boiler is of another version, please consult us before purchasing: it may have a different pump group. Send us a photo of your boiler's control board and your spare part from Contact, or call 911 17 77 77.

Where is the code for my part?

On a white label attached to the black cover of the assembly. It carries the customer code (3.017103 KW28) and the article code (10037608102500). The pump has its own label on the silver face, with the model OTSL 15/5-3 C, the three speeds, and the codes 4514836 and 4514868.

Is the reference 3.019394?

No. The 3.019394 is the OTSL 15/5-3 C circulator on its own, without the hydraulic body. This part is the assembly with the mounted pump and its reference is 3.017103.

Is it the complete set or just the pump?

It is the hydraulic assembly: the body with the OTSL 15/5-3 C pump mounted. If you only need to replace the pump, check first if the loose pump will work for you or if you need the assembly. If in doubt, contact us with a photo of your part.

What do the marked numbers on the part mean?

The 3.017103 is the Immergas code for the assembly and KW28 is its designation. The 10037608102500 is the manufacturer's article code for the assembly, O.T.M.A. The 451 858 04 is the marking on the body and SX is the configuration of the assembly. The 4514836, 4514868, and 21000606500800 are marked on the pump: use them to compare with your part.

Is it compatible with the Immergas Eolo Extra 24 kW?

Contact us before purchasing. Send us a photo of your boiler's PCB and the label of your spare part from the Contact section, or call 911 17 77 77.

Is it sold tested and with a warranty?

Yes. The part is refurbished, tested, and comes with a 1-year warranty. It must be installed by a qualified technician.

Entrega calculada por destino Delivery time shown at checkout

1-year warranty reviewed and tested

14-day return uninstalled parts

Technical support we verify your model

Immergas Eolo Mini 28 Export OTMA OTSL 15/5-3 C Circulating Pump Ref. 3.017103