Pump Controller TECH ST-21BUFOR white — ST-21BUFORWH compact wall-mounted unit

TECH ST-21BUFOR white is a compact wall-mounted pump controller designed for managing and protecting circulation pumps in heating and domestic water systems. The unit provides basic automation that starts and stops the pump according to system conditions, offers protection against dry-running and overload, and simplifies integration into residential and light-commercial installations. Its white housing and compact footprint allow installation on boiler room walls or inside service cabinets while keeping controls accessible for routine checks and adjustments.

Advantages

The controller delivers reliable pump protection and straightforward control logic in a compact, wall-mount format. It supports automatic start/stop according to configured parameters and includes built-in safeguards to reduce the risk of pump damage. The white casing and clear control layout facilitate installation and user interaction without occupying significant space. Designed for common circulation pump types, the device helps reduce manual intervention and contributes to smoother system operation.

Suitable for

• Residential central heating circulation systems
• Domestic hot water recirculation
• Small commercial heating installations
• Retrofit projects replacing basic manual pump controls
• Pump protection where space is limited

Key specifications

• Mounting type: wall-mounted compact unit
• Functionality: automatic pump start/stop and protection
• Protection features: dry-run detection and overload protection
• Enclosure color: white
• Controls: front-accessible settings for operation and safety parameters
• Typical applications: circulation pumps for heating and domestic hot water systems

How to use

Install the TECH ST-21BUFOR on a secure vertical surface near the pump or inside a service cabinet, ensuring compliance with local electrical regulations and correct mains supply connection. Connect pump power and control wiring according to the system diagram, set the operating parameters using the front-access controls, and test automatic start/stop and protection responses during initial commissioning. Regularly inspect wiring and terminal connections and verify that safety features such as dry-run detection are functioning as part of routine maintenance.

Usage recommendations

For reliable operation, match the controller settings to the pump specifications and the hydraulic characteristics of the system. Ensure electrical installation is performed by a qualified technician and verify protection functions after any pump replacement or significant system changes. Avoid exposure to excessive moisture or direct water spray and keep the enclosure closed to maintain protection.