Room thermostat - wireless - 2x1,5V AAA; +6 °C to +30 °C IVAR.DTP

Product detailed description

This wireless room thermostat is commonly used in residential and commercial buildings for HVAC control systems. It is installed in rooms where precise temperature regulation is required, such as living areas, offices, or utility spaces. The device is designed for use in systems where a wired thermostat is impractical or where retrofitting is necessary without running new cables. The battery-powered design ensures flexibility in placement and eliminates the need for electrical wiring to the device itself.

As a wireless solution, it communicates via the 868.15 MHz frequency band to a compatible receiver, making it ideal for systems where minimal disruption is required. It is particularly useful in older buildings or new installations where cabling is not feasible. The thermostat is suited for use with heating systems that require room-based temperature control, including radiant heating, underfloor heating, and radiator systems.

Technical parameters

Code	DTPF85BC
Brand	IVAR

The operating range of +6°C to +30°C makes it suitable for most indoor environments, including spaces with fluctuating temperatures. The use of 2 x 1.5 V AAA batteries ensures long-term operation without the need for frequent replacements. The 868.15 MHz frequency band is standard for European wireless HVAC systems and ensures reliable communication with the IVAR.DA receiver. The option to connect an external NTC 100 kΩ sensor allows for more accurate temperature readings in specific applications.

Installation and connection

The installation process involves mounting the thermostat in a representative location within the room, ensuring it is away from direct heat sources or drafts. The device requires no electrical connections at the thermostat itself, as it is powered by batteries. The wireless signal must be verified for strength and reliability to the IVAR.DA receiver. Common installation errors include placing the thermostat near windows, doors, or appliances that emit heat, which can lead to inaccurate readings. It is also important to ensure that the signal path between the thermostat and the receiver is not obstructed by thick walls or metal structures.

Compatibility and accessories

This thermostat is specifically designed to communicate with the IVAR.DA receiver. For applications requiring remote or more accurate temperature sensing, the external NTC 100 kΩ sensor IVAR.STA0P3 can be connected. No additional wiring is required for the thermostat itself, but the receiver must be correctly configured in the system. The DTPF85BCT variant is available for use in public spaces with a concealed control element.

Technical background for designers

The thermostat operates by detecting ambient temperature and sending a wireless signal to the IVAR.DA receiver, which then controls the heating system accordingly. The use of an NTC 100 kΩ sensor allows for more precise temperature measurement, as the resistance of the sensor changes with temperature. The battery-powered design eliminates the need for electrical connections at the thermostat, simplifying installation. The choice of 868.15 MHz ensures compatibility with European wireless standards and minimises interference. The device’s longevity is influenced by battery life and the stability of the wireless signal.

Service and operation

Routine service includes checking the battery level and ensuring the wireless signal remains strong. The batteries should be replaced when the thermostat’s performance begins to degrade, such as delayed response times or inaccurate readings. No scheduled service intervals are specified in the technical documentation. The device should be kept clean and free from dust to ensure the sensor functions correctly. If the thermostat is not responding as expected, the signal path to the receiver should be verified and any obstructions removed.

Frequently asked questions

Can an external sensor be connected to this thermostat?
Yes, the IVAR.STA0P3 NTC 100 kΩ sensor can be connected for more accurate temperature readings in specific applications.

What is the power source for the thermostat?
The thermostat is powered by 2 x 1.5 V AAA batteries, eliminating the need for electrical wiring at the device itself.

What frequency does the thermostat use for communication?
The device operates on the 868.15 MHz frequency band, which is standard for European wireless HVAC systems.

Is this thermostat suitable for public spaces?
Yes, the DTPF85BCT variant is designed for use in public spaces with a concealed control element.