# TECH controller for installations i-3PLUS white — controls 3 valve actuators and solar input (STI3PLUSWH)

**URL:** https://aio.lv/en/product--tech-sti3pluswh--11072588
**Data updated:** 2026-03-07 18:14 (EET)
**Category:** Control Systems
**Manufacturer:** TECH
**Manufacturer code:** STI3PLUSWH
**EAN:** 5902479661803
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 557.49 €
**Prices and availability valid until:** 2026-07-04 23:59
**Price without VAT (21%):** 460.74 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--tech-sti3pluswh--11072588

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 26.06.2026 | free |
| Pickup points | 01.07.2026 | 1.99 EUR |
| Courier delivery to door | 01.07.2026 | 4.99 EUR |

## Summary description

Wired installation controller TECH i-3PLUS (white) designed to manage up to three valve actuators and a solar input. Provides centralized control for heating or HVAC zones with independent actuator outputs, sensor inputs and solar system integration. Suited for residential and light commercial installations requiring multi-actuator valve control and basic solar loop coordination.

## Long description

TECH controller for installations i-3PLUS white is a wired zone controller designed to manage up to three valve actuators and a dedicated solar input. The unit centralizes control of heating or HVAC zones with independent actuator outputs, multiple sensor inputs and solar loop coordination, providing a straightforward solution for residential and light commercial multi-zone installations.
Advantages
The controller offers independent outputs for three valve actuators, enabling separate control of three heating or cooling zones. A dedicated solar input allows basic coordination with a solar thermal loop or external solar controller. The wired connection ensures reliable communication and stable power delivery, while the compact white housing supports neat installation in electrical cabinets or switch boxes. Built-in sensor inputs provide flexibility for temperature or flow monitoring without requiring additional interface modules.
Suitable for
 Control of up to three heating or cooling valve actuators in single-family homes
 Light commercial HVAC zoning where independent actuator outputs are required
 Systems that integrate a solar thermal circuit for domestic hot water or auxiliary heating
 Retrofit projects needing centralized wired control for multiple zone valves
Key specifications
 Three independent actuator outputs for valve control
 Dedicated solar input for solar loop integration
 Wired installation format for fixed electrical mounting
 Multiple sensor input capability for temperature or flow sensors
 Compact white enclosure suitable for cabinets and mounting panels
How to use
Mount the controller in an appropriate electrical enclosure following local wiring regulations. Connect each valve actuator to its respective output and wire sensor probes to the sensor inputs according to the installation diagram. Link the solar loop or external solar controller to the dedicated solar input to enable solar coordination. After wiring, apply power and configure basic settings as required for zone priorities and sensor types. Verify actuator operation and sensor readings before placing the system into regular operation.
Usage recommendations
Use compatible valve actuators and sensors specified for low-voltage wired controllers. Ensure all wiring is performed by a qualified electrician and that the controller is installed away from direct moisture and excessive heat. For systems with solar integration, confirm correct sensor placement on the solar loop and test mixing or priority functions during commissioning.

## FAQ

### How much does the TECH i-3PLUS controller — 3-actuator + solar cost, and is it available for purchase?

The price is 557.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 6 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 26.06.2026 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 i-3PLUS controller — 3-actuator + solar 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/11072588/61745986_large.webp