Room thermostat Vaillant calorMATIC 350 (model 0020124476) — wired temperature controller for heating systems

Vaillant calorMATIC 350 is a wired room thermostat intended for controlling central heating systems in residential and small commercial installations. The device provides accurate room temperature sensing, manual setpoint adjustment and schedule-capable regulation to coordinate with compatible boilers and heat generators. Its design focuses on maintaining chosen comfort temperatures while enabling energy-efficient operation through timed control and direct feedback from the living space.

Advantages

The calorMATIC 350 offers stable temperature control using a dedicated room sensor and wired connection to the heating system. It supports time-programmed operation to automate daily and weekly temperature schedules, reducing the need for manual adjustments. The unit is compatible with Vaillant systems and other heating appliances that accept standard wired room thermostat inputs, enabling straightforward integration in existing installations. Simple control logic and clear settings help ensure predictable behavior and reliable operation.

Suitable for

• Single- and multi-room domestic central heating systems
• Small commercial premises where wired thermostat control is required
• Boiler or heat generator installations that accept a room thermostat input
• Applications requiring weekly or daily temperature scheduling

Key specifications

• Room temperature sensing with wired connection
• Manual setpoint adjustment and schedule-capable regulation
• Compatibility with central heating boilers and heat generators supporting wired room thermostats
• Designed for wall mounting in indoor environments
• Controls heating via switching output to the connected heating system

How to use

Mount the thermostat on an interior wall away from direct sunlight, drafts, doors and heat sources to ensure accurate room temperature measurement. Connect the wired terminals to the heating system in accordance with the system’s wiring diagram and installation instructions supplied by the boiler or heat generator manufacturer. Set the desired temperature using the thermostat’s control interface and program daily or weekly schedules as required to match occupancy patterns. After initial setup, verify correct operation by observing that the heating responds to setpoint changes and programmed time periods.

Usage recommendations

For reliable performance, place the thermostat at typical living height in the primary occupied zone and avoid locations near radiators, kitchens or electronic equipment. When integrating with older or third-party boilers, review the boiler documentation for recommended thermostat wiring and control mode. Regularly check programmed schedules and adjust setpoints seasonally to maintain efficient heating behavior.