# Control unit TECH ST-427I for installations — 3 pumps, black

**URL:** https://aio.lv/en/product--tech-st427ibk--10660782
**Data updated:** 2026-03-07 17:57 (EET)
**Category:** Control Systems
**Manufacturer:** TECH
**Manufacturer code:** ST427IBK
**EAN:** 5901445470364
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 134.49 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 111.15 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--tech-st427ibk--10660782

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 07.07.2026 | free |
| Pickup points | 10.07.2026 | 1.99 EUR |
| Courier delivery to door | 10.07.2026 | 4.99 EUR |

## Summary description

TECH ST-427I is a control unit designed for installation use with capability to manage three pumps. The device provides centralized control for multi-pump systems, enabling coordinated pump operation and basic automation tasks. Supplied in a black housing, it is suitable for heating, circulation, or water distribution installations requiring three-pump control.

## Long description

TECH ST-427I control unit for installations — 3 pumps, black is a compact control panel designed to manage and coordinate up to three circulating pumps in heating, circulation, or water distribution systems. The unit provides centralized switching and basic automation functions to maintain scheduled or demand-driven pump operation. Housed in a black enclosure, the control unit is intended for installations where coordinated multi-pump control improves fluid distribution and system reliability.
Advantages
The control unit supports independent control of three pumps, enabling staged operation and alternating duty to balance runtime. Its compact black housing facilitates mounting in service cabinets or near equipment, saving space while protecting internal electronics. Simple interface and clear connections allow straightforward integration with typical installation wiring and sensors. The device is engineered to provide reliable switching and reduce manual intervention in multi-pump systems.
Suitable for
Small commercial or residential heating systems with multiple circulation pumps
Water distribution installations requiring coordinated pump operation
Systems needing pump alternation and staged start to extend pump life
Centralized automation in boiler rooms, plant rooms, or service cabinets
Key specifications
Control channels: three independent pump outputs
Enclosure color and material: black housing suitable for installation mounting
Functionality: coordinated switching, staged operation, and alternation support
Intended application: heating, circulation, and water distribution systems
How to use
Mount the control unit on a suitable surface or inside an installation cabinet, ensuring access to power supply and pump wiring. Connect each pump to the designated output terminals following the wiring diagram provided with the product and observe local electrical safety regulations. Configure control modes, stagings, or alternation settings according to system requirements and available inputs from thermostats or pressure sensors. After wiring and configuration, perform a functional test to verify correct sequencing, start/stop behaviour, and interlocks.
Usage recommendations
Use the control unit with pumps and sensors rated for the same supply voltage and compatible load characteristics. Regularly inspect electrical connections and verify settings after any maintenance. For installations with higher protection or advanced automation needs, integrate the unit with additional controllers or safety devices as appropriate.

## FAQ

### How much does the Control unit TECH ST-427I — 3 pumps cost, and is it available for purchase?

The price is 134.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 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 07.07.2026 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 Control unit TECH ST-427I — 3 pumps 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/10660782/57061779_large.webp