Bomba de calor Viessmann Vitocal 150-A Modular R290, cascada y 70 °C - Q-Tech® 2027
Bomba de calor Viessmann Vitocal 150-A Modular R290, cascada y 70 °C - Q-Tech® 2027

Viessmann Vitocal 150-A Modular R290 heat pump for cascades, up to 70 °C

Modelo
Regular price€10.182,22
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At Q-TECH, we apply the same clear rules for everyone: the law protects you, and when applied correctly, it protects us as well. By processing your purchase, you accept our General Terms and Conditions of Sale. If you are purchasing as a consumer (B2C), nothing stated herein limits the rights granted to you by mandatory law (RDL 1/2007, TRLGDCU): the 3-year legal warranty of conformity and the right of withdrawal under the terms and with the exceptions legally provided, which are detailed below. References to "B2B" apply only to businesses and professionals.

Your guarantees

  • Rights intact: 14 days of withdrawal from receipt for most products—subject to the legal exceptions you will see below, such as goods made to your specifications—and a 3-year legal warranty of conformity, under the terms of the TRLGDCU.
  • Conformity with the description: we guarantee that the equipment will correspond to the published technical description and what one could reasonably expect from it (arts. 115 et seq. TRLGDCU). Images and videos are for guidance only: the manufacturer may supply a more recent revision of the product or introduce minor aesthetic, packaging, or firmware changes, without this constituting a lack of conformity as long as the described characteristics and performance are maintained.
  • Traceability that also protects you: we document the condition, serial number, and seal of each piece of equipment upon shipment, and we video-record the opening of returns; this is your proof of the condition in which the goods were delivered.

Responsible use and your part

  • If you are thinking of returning it, keep it as you received it: without installing or activating it, with its seals, accessories, and packaging intact. This is how to ensure a full refund, without deductions.
  • Handling that exceeds inspection reduces value: handling the equipment beyond what is necessary to verify its nature and operation may result in a real, assessed, and case-by-case justified deduction (art. 108.2 TRLGDCU), never a fixed percentage. In particular: activating or registering the serial number, linking it to a manufacturer's account or app, circulating water through hydraulic equipment, unsealing probes, or installing software or consumables. Initial inspection of the product does not lead to a deduction.
  • The same item must be returned: withdrawal requires returning the supplied unit. Different equipment, or equipment with prior use, age, or wear prior to purchase, does not constitute a valid withdrawal.
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  • Delivery of bulky goods: delivery is made to the curb. B2C: transport risk is ours until physical delivery (art. 66 ter); we recommend noting visible damages on the delivery note and notifying us of breakages within 24-48 hours with photographs to activate the insurance. B2B: inspection and notation on the delivery note are mandatory; hidden damages must be reported within 24 hours (art. 366 CCom). Unjustified rejection or incorrect shipping information will entail the actual outbound and return costs (approx. €85-550 for heavy machinery).

Made to your measure (Advanced Pre-Assembly)

  • If your order includes equipment, racks, hydraulic assemblies, or technical rooms made or configured according to your specifications (permanent joints, custom cuts or wiring, parameterization, pressure testing), these are custom goods without the right of withdrawal from the conclusion of the contract (art. 103.c TRLGDCU; CJEU Case C-529/19), which is informed before purchasing and documented in the signed Order Note. A test you request without permanent modification retains your right of withdrawal, with only the actual loss of value caused by that test being deducted. Would you prefer to receive it tested, configured, and ready to connect, without assuming these risks? Contract our Advanced Pre-Assembly or the prior technical audit.

If you are purchasing as a business or professional (B2B)

  • The transaction is governed by the Commercial Code: firm sale, without the right of withdrawal; notification of defects within 4 days (apparent) / 30 days (hidden), arts. 336 and 342. Q-TECH acts as a distributor and excludes indirect damages, loss of profit, and data loss, limited to the price of the equipment, without prejudice to the manufacturer's commercial warranty.

Product warnings v1.0 · June 2026. Information summary; the complete and binding conditions are those published at q-tech.es.

Vitocal 150-A Modular R290 heat pump for cascades and systems with a buffer tank

The Viessmann Vitocal 150-A Modular R290 is the version of the Vitocal 150-A without a compensation tank or expansion vessel in the indoor unit. It is designed for cascades of up to 5 units and for systems that already need a buffer tank. Q-Tech integrates it into a pre-assembled plant room with the buffer tank, vessel and hydraulics already fitted and tested.

Summary

TypeMonobloc air-to-water heat pump with wall-hung indoor unit, Modular version
Brand and modelViessmann Vitocal 150-A Modular R290, A04 to A16 (230 V) and A10T to A16T (400 V)
UseHeating, cooling and DHW in cascade or with a mandatory buffer tank
Rated heat output (A7 W35)4.0 to 9.1 kW per unit
Buffer tankMandatory, minimum 12 litres per kW
Expansion vesselNot included: installed externally
Power supply230 V single-phase or 400 V three-phase
WarrantyViessmann 5-year total warranty, subject to its general terms of sale
Q-Tech installationPre-assembled plant room with buffer tank and vessel, or on-site integration; see workshop pre-assembly

What is the Vitocal 150-A Modular R290?

The Viessmann Vitocal 150-A Modular R290 is a monobloc air-to-water heat pump for heating, cooling and DHW that omits the compensation tank and expansion vessel so it can run in cascade or with an external buffer tank. It reaches 70 °C flow temperature with R290 propane.

Differences from the standard Vitocal 150-A

Viessmann offers the Vitocal 150-A in two versions with the same outdoor unit and the same output data. The standard version has a compensation tank and expansion vessel in the indoor unit. The Modular version leaves them out so the system designer can choose the right buffer tank and vessel.

This makes it useful in plant rooms with several heat pumps: Viessmann allows cascades of up to 5 units. It also suits systems with several circuits, where a buffer tank is required anyway.

What problem does it solve?

In a large home, a small building or a system with several circuits, a single heat pump may fall short or run poorly at part load. Viessmann provides for cascades of up to 5 units to add output within the same range.

The risk lies in the hydraulic design: an undersized buffer tank or vessel causes short cycling and alarms. That is why Viessmann requires 12 litres of buffer per kW on this version.

Technical data

RefrigerantR290 (propane), GWP100 0.02
Refrigerant charge1.20 kg (A04 to A08); 2.00 kg (A10 to A16T)
Energy class (heating)Up to A+++ at 35 °C and A++ at 55 °C
Maximum flow temperature70 °C, at outdoor temperatures down to −10 °C
CascadeUp to 5 units
Buffer tankMinimum 12 litres per kW, not included
Heating circuit expansion vesselExternal, not included
Safety valve3 bar
Hydraulic connectionsCu 28 × 1 mm between units and on heating and cooling outlets; Cu 22 × 1 mm on DHW outlets
Indoor unit (width × height × depth)450 × 920 × 360 mm, 47 kg according to the Viessmann data sheet
Outdoor unit (width × depth)1,144 × 600 mm; height 841 mm (A04 to A08) or 1,382 mm (A10 to A16T)
Sound level51 to 55 dB(A) depending on model; 39 dB(A) at 4 m, according to Viessmann
ConnectivityBuilt-in Wi-Fi, ViCare app, Viessmann One Base
CertificationsHP Keymark

Models and data by variant

ModelVoltageHeat A7 W35COP A7 W35SCOP W35Heat A7 W55Cooling A35 W18Outdoor unitSoundReference without AF kitReference with AF kit
A04230 V4.0 kW5.04.503.56 kW4.00 kW162 kg51 dB(A)Z032147Z032219
A06230 V4.8 kW4.94.604.39 kW5.0 kW162 kg51 dB(A)Z032148Z032220
A08230 V5.6 kW4.74.405.36 kW6.0 kW162 kg51 dB(A)Z032149Z032221
A10230 V7.3 kW5.04.836.75 kW9.60 kW191 kg53 dB(A)Z032150Z032222
A13230 V8.1 kW5.04.527.56 kW11.00 kW191 kg54 dB(A)Z032151Z032223
A16230 V9.1 kW4.94.538.49 kW13.20 kW191 kg55 dB(A)Z032152Z032224
A10T400 V7.4 kW5.25.066.8 kW9.50 kW197 kg53 dB(A)Z032153Z032225
A13T400 V8.1 kW5.14.937.6 kW11.20 kW197 kg54 dB(A)Z032154Z032226
A16T400 V9.1 kW5.04.788.5 kW13.30 kW197 kg55 dB(A)Z032155Z032227

The indoor unit is AWMOF-V001 without the AF kit and AWMOF-V002 with the AF kit, according to the Viessmann price list. Output ranges, EER and SEER for each model are in the Viessmann PDF (in Spanish).

Compatibility and limits

  • Requires a buffer tank of at least 12 litres per kW and an external expansion vessel.
  • Allows cascades of up to 5 units, according to Viessmann.
  • Works with underfloor heating, radiators and fan coils; up to 3 mixed circuits after the buffer tank.
  • DHW requires an additional DHW cylinder.
  • Models A10T, A13T and A16T need a 400 V three-phase supply.
  • Viessmann offers a 5-year total warranty, subject to its general terms of sale.
  • R290 is flammable: the outdoor unit is positioned according to the Viessmann installation manual.

When this product is not the right choice

Frequently asked questions

What is the difference between the Vitocal 150-A Modular and the standard version?

The Modular has no compensation tank or expansion vessel in the indoor unit. Output, outdoor unit and technical data are the same according to the Viessmann price list.

What buffer tank do I need?

At least 12 litres per kW of installed output, according to Viessmann. For a cascade, Q-Tech sizes it from the total output before quoting.

How many Vitocal 150-A Modular units can I connect in cascade?

Up to 5 units, according to Viessmann.

What is the difference between the versions with and without the AF kit?

They are separate price-list references: AWMOF-V002 with the AF kit and AWMOF-V001 without it. We confirm which one suits you before you order on WhatsApp.

What is the delivery time?

Made to order: we confirm the lead time before preparing your order.

Can I install it myself?

It is not advisable. It uses R290 refrigerant, and the electrical and hydraulic installation and its certification belong to an authorised installer.

Q-Tech installation and support

A cascade of Vitocal 150-A Modular units is the typical case for a pre-assembled plant room: in the Q-Tech workshop we fit the heat pumps, buffer tank, vessel and hydraulics, and run safety and operating tests including a pressure test. The plant room arrives ready to connect, and the final connection is made by the site installer or by Q-Tech with the on-site Expert Technician by the day.

If another company has already installed the unit, or it is to be integrated into an existing system, a prior verification visit with the on-site hourly Expert Technician comes first. The installer then connects the hydraulics and Q-Tech completes the electrics, controls and internet connection. In every case we offer a pre-commissioning check, remotely or on-site, and on occasion the official commissioning with Viessmann.

The result for your project: fewer companies in the plant room and a final connection from one working day depending on the type and size of the room. More information on Advanced Pre-Assembly, the Viessmann heat pumps, our heat pump services and Viessmann technical support, or on WhatsApp.

Documentation

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