Termostato de suelo radiante Vicare de Viessmann ZK03838 - Q-Tech ® 2026

Viessmann Vicare underfloor heating control

Regular price €429,52 Sale price€359,90
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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.
  • Installation and cybersecurity, shared responsibility: this is technical hardware; you are responsible for correct installation, credentials, patches, and backups, while we deliver a compliant product. Q-TECH is not liable for damages resulting from poor installation, incorrect configuration, or omission of patches by the customer or third parties (in B2C, without prejudice to the legal warranty and liability for intent or negligence, arts. 86 and 130 TRLGDCU).
  • 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.

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Viessmann ViCare underfloor heating control

ViCare underfloor heating thermostat, capable of controlling up to 6 underfloor
heating zones (230 V valve actuators) and 3 actuators per zone via wireless communication (low-power radio frequency). Each zone requires a climate sensor (wireless room sensor), (low-power radio frequency). Underfloor heating thermostat for individual room control.

The ViCare underfloor heating control device can only be used with:

- Heat generator with Viessmann One Base.

- Viessmann heat generator with Vitoconnect, e.g. Model OPTO2.

- Vitoconnect, e.g. Model OPTO2 without connection to a Viessmann heat generator.

Communication between the ViCare underfloor heating control device and the heat generator with Viessmann One Base or Vitoconnect takes place via low radio frequency signals.

Functions of the Viessmann ViCare underfloor heating control:

- The zones of the ViCare underfloor heating control device can be included in the individual temperature control, which is comfortable and energy-efficient.

- Automatic individual time programs and manual control can also be used for individual temperature control.

- The ViCare underfloor heating control device has a control contact for heat demand or solenoid valve control.

- When operating with the heat generator with Viessmann One Base or Vitoconnect, e.g. Model OPTO2, the heat demand is determined automatically and controlled optimally.

Note: At least one temperature value from 1 ViCare climate sensor is required per heating circuit.

- The ViCare underfloor heating control device has an internal frost protection that prevents the pipes from freezing. If the flow temperature drops below 8 °C, the ViCare underfloor heating control device opens until the flow temperature is reached again.

- With heating circuit protection function in case of communication error with the heat generator with Viessmann One Base or Vitoconnect, e.g. Model OPTO2. Heat demand is activated and all valves are set to 10%. When communication is restored, the valves return to normal operation.

- The ViCare underfloor heating control device is compatible with operation with "normally closed" 230 V thermal actuators (provided by the installation company).

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