Heatit Z-Temp3 Battery-operated Thermostat 800 series

The Heatit Z-Temp3 Battery-operated Thermostat 800 series is a wireless Z-Wave device designed primarily for controlling water-based heating systems by communicating wirelessly with external relays or controllers (like the Heatit Z-Water2).

Here are its key features and specifications:

Functionalities:

• Z-Wave 800 Series Chip: Uses the latest generation of Z-Wave technology for improved range, efficiency, and security.

• Battery-operated: Runs on 2 x AAA batteries, offering a "wire-free" solution for installation (can also be connected to an external 3.3 VDC power source using an optional transformer).

• Internal Sensors: Includes built-in temperature and humidity sensors.

• Control Modes: Supports 3 modes: Heat, Cool, and Eco.

• Master Thermostat Function: Can be set up to send its setpoint and mode to other associated Z-Wave devices.

• Regulation: Supports regulation via Hysteresis (adjustable from 0.3∘C to 3.0∘C) or PWM (Pulse-Width Modulation).

• Open Window Detection (OWD): Automatically reduces the setpoint (to 5∘C) when a rapid temperature drop is detected.

• Display: LCD display with backlight.

• Security & Updates: Supports S2 security and Firmware Updates Over The Air (OTA).

• Compatibility: Fits into System 55 frames.

• Child Lock: Features a lock mode to disable local button access.

Z-Wave and Connectivity:

• Protocol: Z-Wave Plus V2 (800 Series chip).

• Wireless: All communication to the controlled heating device (e.g., a relay or another thermostat) is $100\%$ wireless.

• SmartStart: Supports SmartStart for easy inclusion/setup.

• Associations: Allows up to 10 associations per group (for controlling external relays, thermostats, etc.).

It is essentially a smart wall thermostat used to measure the room environment and wirelessly command an actuator (like a switch or valve controller) to turn the heating/cooling on or off based on the set temperature.