Vaillant high-efficiency class A electronic pump for ecoCRAFT 80 kW
Code: 0020180026Product detailed description
High-efficiency electronic class A pump for Vaillant ecoCRAFT 80 kW
This high-efficiency electronic class A boiler circuit pump is an original Vaillant accessory designed for the stationary condensing boilers of the ecoCRAFT series with an output of 80 kW. The ecoCRAFT series (specifically the ecoCRAFT exclusiv VKK models) represents Vaillant's commercial/industrial line of condensing boilers with an output range of approximately 80 to 280 kW across six power stages, intended for boiler rooms of apartment buildings, office buildings, industrial halls and other facilities with higher heat demand, where they are commonly installed in cascade configurations of multiple units.
The pump ensures forced circulation of heating water through the boiler's primary heat exchanger and its further distribution into the system. It is an electronically commutated type with continuous speed control, which changes directly according to the current modulation of the burner (ecoCRAFT boilers operate with a modulation range of roughly 17% to 100% of the rated output) – so at lower current boiler output the pump automatically reduces its speed and thus its electricity consumption, while at full output it ensures sufficient flow for safe removal of the heat generated in the heat exchanger.
Technical characteristics
- Intended for: Vaillant ecoCRAFT (VKK) with an output of 80 kW
- Pump type: high-efficiency electronically controlled boiler circuit circulation pump, energy efficiency class A
- Control: continuous speed variation according to the current modulation of the boiler burner (modulation range roughly 17–100%)
- Housing material: durable cast iron, the circulation section (rotor, bearings) adapted to the standard parameters of treated heating water
- Electrical connection: directly from the boiler's control board, without the need for a separate external power source or external speed control
- Max. operating water temperature: up to 110 °C
- Max. system operating pressure: up to 6 bar
- Noise level: low, electronically commutated motor without mechanical brushes
- Installation: directly onto the ecoCRAFT 80 kW boiler body, according to the manufacturer's installation manual
Why this pump is essential for ecoCRAFT 80 kW boilers
ecoCRAFT boilers are in practice installed either as a standalone heat source for a larger facility, or in a cascade configuration of multiple units with a total installed output in the range of hundreds of kW, where it is essential to ensure a precisely defined and even flow through each individual boiler body. Insufficient flow at a given output leads to an increased temperature difference between flow and return (ΔT), which increases thermal stress on the heat exchanger and can trigger a protective shutdown of the boiler, while an oversized pump unnecessarily increases electricity consumption and operating noise. That is why Vaillant supplies a separately sized version of this pump for each output segment of the ecoCRAFT series (80 kW, 120/160 kW, 200/240/280 kW).
The electronic linkage with the boiler's control unit, which adjusts the pump speed directly according to the current burner modulation, is also the reason why it is recommended to use exclusively the original Vaillant pump corresponding to the given output stage for this type of boiler – the communication protocol and the control curve are set by the manufacturer specifically for this particular part.
Installation and hydraulic connection
Installation must be carried out exclusively by an authorized service technician qualified for the installation of gas and heating equipment, in accordance with the manufacturer's installation manual. The pump is mounted directly onto the ecoCRAFT 80 kW boiler body; after installation, the circuit is bled and checked for leaks at operating pressure. In a cascade configuration of multiple boilers, the pump of each boiler is set and tested individually, after which the entire cascade is tested as a functional unit, including the hydraulic balancing of individual branches.
We recommend that the same service job also include a check of the heating water quality in accordance with the VDI 2035 guideline, since improperly treated water significantly shortens the service life of the circulation pump and the boiler's primary heat exchanger regardless of the quality of the part itself. In practice, this pump is most often installed during the initial installation of a new ecoCRAFT 80 kW boiler, when replacing a faulty or worn-out pump, or when expanding an existing boiler room with an additional boiler in a cascade configuration.
Compatibility
The pump is intended exclusively for Vaillant ecoCRAFT stationary condensing boilers with an output of 80 kW. The ecoCRAFT series covers an output range of approximately 80 to 280 kW across six power stages, and Vaillant supplies a separately sized pump with different flow parameters for each segment (80 kW; 120/160 kW; 200/240/280 kW). This part is therefore not interchangeable with pumps intended for higher ecoCRAFT power stages, nor with pumps for other Vaillant boiler series (e.g. ecoTEC plus or ecoVIT). When ordering, we recommend always verifying the exact power rating of the boiler, for example directly on the rating plate.
Maintenance and care
High-efficiency electronic pumps of this type practically require no manual maintenance during normal operation – they have no lubrication points or mechanical components requiring regular lubrication. As part of the annual boiler service inspection, we recommend checking:
- the tightness of the pump's connection to the boiler body,
- the noise level and smoothness of the pump's operation,
- the functionality of the electronic speed control compared to the required boiler modulation,
- the quality of the heating water and any deposits in the circulation section during professional disassembly during servicing.
In cascade configurations where some boilers may be temporarily out of operation (for example under partial system load), we recommend verifying that the control unit regularly alternates the load between the individual boilers of the cascade, thereby preventing a pump from standing idle for a long time and the associated risk of seizing due to deposits.
Why choose an original Vaillant part
The original pump guarantees precise hydraulic and electronic matching with the ecoCRAFT boiler's control unit, which directly affects the reliability and service life of the entire installation at this output level. The part undergoes the same quality control as the boiler itself, and its use is also a condition for honoring the manufacturer's warranty on the boiler body in the event of a failure related to heating water circulation. Given the high value of the investment in a boiler in this output segment, the use of a non-original or incorrectly sized pump is clearly not recommended.
About the Vaillant ecoCRAFT series
ecoCRAFT exclusiv (VKK) is a series of stationary (floor-standing) gas condensing boilers from Vaillant designed for commercial, industrial and larger residential applications, with an output range of approximately 80 to 280 kW divided into six power stages. Boilers in this series achieve high standardized efficiency even under partial load and operate with continuous burner output modulation across a wide range, which, combined with a correctly and precisely sized electronic pump (such as this part), enables efficient and reliable operation under fluctuating heat demand throughout the day and year. Thanks to their compact dimensions relative to output and the ability to cascade multiple units, ecoCRAFT is commonly used even where a single large boiler would be less flexible than several smaller units connected in a cascade with the ability to start up gradually according to current demand.
Overview of pumps across the entire ecoCRAFT series
Vaillant supplies three separately sized variants of this pump for the ecoCRAFT series, depending on the boiler's output segment:
- For 80 kW (this part) – the lowest output segment of the ecoCRAFT series,
- For 120/160 kW – the medium output segment, larger flow cross-section,
- For 200/240/280 kW – the highest output segment of the ecoCRAFT series, the highest flow demands.
When ordering a cascade configuration combining boilers of different output stages, it is therefore necessary to order a pump matching the specific output segment for each boiler, not a single universal part for the entire cascade.
This principle also applies to service replacement within an existing cascade – even if all boilers were originally the same output, it is always necessary to verify the current rating of the specific boiler body when ordering a replacement part.
Frequently asked questions
Is this pump included in the standard delivery of the ecoCRAFT 80 kW boiler?
For ecoCRAFT boilers, this pump is a standard required accessory that is ordered separately alongside the boiler body, as the manufacturer does not supply it as a fixed part of the boiler's basic package.
Can this pump also be used with higher ecoCRAFT output stages?
No, for higher output stages (120/160 kW and 200/240/280 kW), Vaillant supplies separately sized variants of this pump with higher flow parameters, which are not interchangeable with this part.
Does this pump save electricity?
Yes, the electronically controlled class A pump continuously adjusts its speed according to the current boiler modulation, bringing noticeable electricity savings in installations with long annual operating hours compared to an older, non-regulated pump.
Can the pump be installed by an ordinary DIY handyman?
No. Installation requires professional qualification for working with gas and pressurized heating equipment and intervention in the boiler's primary circuit, so it may only be carried out by an authorized service technician.
Is the pump suitable for a cascade configuration of multiple ecoCRAFT boilers?
Yes, ensuring the correct flow through each individual boiler is especially important in cascade configurations, and installing this pump on each boiler body is the standard solution to this requirement.
What is the warranty on this part?
Original Vaillant accessories are covered by a standard 24-month warranty from the date of sale or commissioning by an authorized service technician.
Why does the boiler report a flow fault even after the pump has been replaced?
The most common causes are air in the system, insufficiently open shut-off valves in the boiler circuit, or a clogged filter on the return pipe. In the event of a flow fault, we recommend having the system checked by a service technician, including bleeding and checking the patency of the filters.
Is the pump noisy?
The electronically commutated motor without mechanical brushes operates with significantly lower noise than older types of pumps. In a standard boiler room with adequate sound insulation, the pump's operation is not disruptive.
How do I find the exact output segment of my ecoCRAFT boiler?
The exact output rating can be found on the boiler body's rating plate, or in the accompanying technical documentation or installation record. If in doubt, we recommend contacting an authorized Vaillant service center.
Why doesn't Vaillant supply a single universal pump for the entire ecoCRAFT series?
The individual output segments of the ecoCRAFT series (80 kW, 120/160 kW, 200/240/280 kW) have significantly different requirements for pump flow rate and head. A universal, oversized pump for the entire series would consume unnecessarily more electricity at lower outputs, while an undersized pump would not be able to ensure sufficient flow at higher outputs – which is why Vaillant supplies a separately sized part for each segment.
Does this pump also require separate thermal insulation?
For higher-output boilers, Vaillant offers separate thermal insulation parts for pumps and connection fittings, which reduce heat losses in the boiler room. We recommend verifying the suitability and availability of specific insulation for the given output segment with an authorized service center or supplier.
What if the boiler is used only seasonally or with intermittent operation?
For seasonal or intermittent operation, we recommend having a service technician check the free running of the pump and the condition of the heating water before restarting after a longer shutdown, as water standing in the system for a long time can promote the accumulation of deposits in the circulation section.
Additional parameters
| Category: | Vaillant – valves, insulation and installation kits |
|---|---|
| Warranty: | 2 years |
| Brand: | Vaillant |
| Product type: | High-efficiency electronic boiler circuit pump |
| Intended for: | Vaillant ecoCRAFT (VKK) with an output of 80 kW |
| Energy efficiency class: | A (in accordance with ErP Regulation 641/2009) |
| Speed control: | Continuous, electronic, according to current boiler modulation |
| Pump housing material: | Cast iron, circulation section resistant to treated heating water |
| Electrical connection: | Directly from the boiler's control board, without a separate external power source |
| Max. operating temperature: | up to 110 °C |
| Max. operating pressure: | up to 6 bar |
| Country of origin: | Germany / EU (Vaillant Group) |
| Warranty: | 24 months |
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