
Hard-wired room thermostat with buttons for boiler or non-reversible heat pump 5 Years warranty Precise temperature setting - Choice of operating modes: Comfort, Reduced, Frost Protection, Off Backlit screen Prevents handling errors thanks to the settings lock function Power supply of the room unit: 2 LR03 batteries (supplied) Batteries life 2 years Change-over dry contact output: 2 A/230V Control and display range from 5° to 30°C Dimensions 80 x 80xD23mm Protection index : IP 30 Insulation class : Class II Replaces DIANA D 10
Available
Hard-wired room thermostat with buttons for boiler or non-reversible heat pump5 Years warranty Precise temperature setting - Choice of operating modes: Comfort, Reduced, Frost Protection, Off Backlit screen Prevents handling errors thanks to the settings lock function Power supply of the room unit: 2 LR03 batteries (supplied) Batteries life 2 years Change-over dry contact output: 2 A/230V Control and display range from 5° to 30°C Dimensions 80 x 80xD23mmProtection index : IP 30 Insulation class : Class II Replaces DIANA D 10
Features of product: ELECTRONIC ROOM THERMOSTAT DELTA DORE TYBOX 21- DELTA DORE - 6053034

A thermostat is not just a simple accessory: it is the device that regulates temperature, comfort stability, and the operational logic of your heating system. When regulation is inaccurate, the consequences are immediate: temperature fluctuations, short generator cycles, unnecessary consumption, and accelerated wear of certain components.
Delta Dore thermostats are designed to ensure stable and consistent regulation suited to the constraints of residential installations, whether it’s a boiler, a heat pump, or a multi-zone system. A compatible part can restore reliable control without modifying the existing installation, as long as the electrical characteristics and type of control are adhered to.
Depending on your setup (central heating, pilot wire, dry contact, radio), the components to check or replace may differ. Here are the most critical elements to bring your regulation back to the correct level:
Room thermostats (wired or wireless): they measure the temperature and control the generator. In case of drift, erratic display, or unstable regulation, the thermostat is often at fault.
Receivers / control modules: they ensure the connection between the thermostat and the equipment (boiler, heat pump, zone). A faulty module can cause inconsistent commands (permanent heating or lack of heating).
Probes and sensors: depending on the installations, an indoor or outdoor probe influences regulation. A defective sensor can skew measurement and disrupt heating cycles.
Many thermostats and receivers look alike, but their technical specifications differ: type of control (dry contact, pilot wire), radio protocol, boiler/heat pump compatibility, power supply, or multi-zone management. A visually similar reference may be functionally incompatible.
To avoid any errors, precisely identify:
The exact reference of the thermostat and/or receiver (product label or documentation).
The type of installation: boiler, heat pump, single zone or multi-zones.
The mode of control: wired, wireless, pilot wire, dry contact.
Technical advice: before replacement, check functional compatibility (type of control, power supply, protocol). Well-suited regulation limits short cycles, stabilizes temperature, and enhances the durability of the installation.
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