# Thermostatic Valve Controller TECH TSSTL-12 — wired/wireless, 8 sections, RS485 communication

**URL:** https://aio.lv/en/product--tech-tsstl-12--11960004
**Data updated:** 2026-03-11 13:59 (EET)
**Category:** Control Systems
**Manufacturer:** TECH
**Manufacturer code:** TSSTL-12
**EAN:** 5902479666136
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 468.99 €
**Prices and availability valid until:** 2026-07-07 23:59
**Price without VAT (21%):** 387.60 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--tech-tsstl-12--11960004

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 30.06.2026 | free |
| Pickup points | 03.07.2026 | 1.99 EUR |
| Courier delivery to door | 03.07.2026 | 4.99 EUR |

## Summary description

TECH TSSTL-12 is a wired and wireless controller for thermostatic radiator valves supporting up to 8 sections and RS485 communication. It provides centralized control of valve actuators for zoned heating systems, enabling scheduled or manual temperature adjustments, integration with building automation via RS485, and reliable multi‑zone management in residential or commercial installations.

## Long description

TECH TSSTL-12 is a wired and wireless thermostatic valve controller designed to manage up to eight heating zones. The unit provides centralized control of radiator valve actuators and supports RS485 communication for integration with building automation systems. It enables scheduled and manual temperature adjustments across multiple sections, allowing efficient zoned heating in residential and commercial installations.
Advantages
The controller combines wired and wireless connectivity for flexible installation and reliable operation. RS485 communication ensures stable integration with third‑party automation equipment and enables remote monitoring and control. Support for eight separate sections allows independent scheduling and temperature control for different rooms or zones, improving comfort and energy management. The device is suitable for retrofits and new installations thanks to its compatibility with standard thermostatic valve actuators.
Suitable for
Multi‑zone radiator heating systems in apartments and houses
Small commercial buildings, offices, or guest accommodation with zoned temperature control
Integration into HVAC and building automation systems via RS485
Retrofit projects where a mix of wired and wireless connectivity is required
Key specifications
Control capacity: up to 8 independent sections
Communication: wired RS485 interface plus wireless option for valve actuators
Control modes: scheduled (timers) and manual adjustments
Compatibility: designed for use with standard thermostatic radiator valve actuators
Installation: centralized controller for zoned heating management
How to use
Install the controller in a central location with access to power and the RS485 network. Connect valve actuators for each heating section either by wiring or pairing them wirelessly according to the actuator and controller instructions. Configure section names and schedules using the controller interface or the connected automation system over RS485. Use manual override options when temporary adjustments are needed; scheduled profiles will resume according to the programmed timetable.
Usage recommendations
Place the controller where it can maintain reliable wired or wireless links to all actuators and to the RS485 network. For best performance, combine scheduled control with occasional manual checks, and validate integration with the building automation system during commissioning to ensure correct responses from each zone.

## FAQ

### How much does the TECH TSSTL-12 thermostatic valve controller cost, and is it available for purchase?

The price is 468.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 30.06.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can TECH TSSTL-12 thermostatic valve controller be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All TECH products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized TECH service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11960004/67405426_large.webp