HOTOWELL HTW-WF02 Series

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Summary

Operation

Lock;Unlock

Functionality for locking/unlocking thermostat controls.

Programmable Schedule Configuration (5+2 weekly)

Setting up heating schedules for weekdays and weekends.

Floor Temperature Display

How to view floor sensor temperature readings.

Installer Set-UP Process (ISU)

Temperature Calibration

Adjust internal sensor temperature readings.

Dead Zone

Configure switching differential for heating/cooling control.

Keypad Lock Type

Define which buttons are locked to prevent accidental changes.

Sensor Selection

Choose internal, external, or combined sensor for temperature control.

Standby Backlight Time

Set the duration the display backlight remains active.

Max. Set-Point Limit

Define the maximum allowable temperature setting.

12;24 Hour Display

Select the time format for the thermostat display.

Display Mode

Choose what information is shown on the display.

Low Temperature Protection

Set a minimum temperature threshold to prevent damage.

High Temperature Protection

Set a maximum temperature threshold to prevent overheating.

Return to Factory

Reset thermostat settings to their default factory values.

This document describes the HTW-WF02 series Smart Wi-Fi Thermostat, a device designed for maintaining an ideal room temperature in various environments such as homes, residential buildings, schools, hotels, hospitals, and offices. It supports Electric Underfloor Heating, Water Heating, and Water/Gas Boiler systems.

Function Description

The HTW-WF02 series thermostat allows users to control heating systems to achieve a desired room temperature. It features Wi-Fi connectivity, enabling remote control and scheduling via a smartphone application. The thermostat supports 47 mainstream languages in the app, including English, Spanish, Russian, Hungarian, Turkish, Hebrew, German, Italian, Japanese, French, Polish, Simplified Chinese, Traditional Chinese, Dutch, Portuguese, Vietnamese, Arabic, and Korean. It is compatible with smart home ecosystems like Amazon Echo, Google Home, and Tmall Genie, allowing for voice control. Group control of multiple thermostats is also possible through a single app.

The device offers both manual and programmable modes. In manual mode, the temperature is set directly. In programmable mode, users can set a 5+2 weekly schedule with six periods per day (three for weekdays and three for weekends), each with a specific time and temperature. The default settings for weekdays include "Comfort" at 20°C from 06:00, "Economy" at 15°C from 08:00, "Comfort" at 15°C from 11:30, "Economy" at 15°C from 13:30, "Comfort" at 22°C from 17:00, and "Economy" at 15°C from 22:00. Weekend defaults are similar, with "Comfort" at 20°C from 06:00, "Economy" at 20°C from 08:00, "Comfort" at 20°C from 11:30, "Economy" at 20°C from 13:30, "Comfort" at 15°C from 17:00, and "Economy" at 15°C from 22:00. When connected to Wi-Fi, the thermostat prioritizes the programmable schedule set via the app over the device's internal schedule.

The thermostat includes a keypad lock function, configurable to lock all buttons except the power button or all buttons completely. It also features low and high temperature protection settings to prevent extreme temperatures.

Important Technical Specifications

Power Supply: 95~240Vac, 50/60Hz
Current Load:
- 3A (for -3A, -NV applications: Water Heating, Water/Gas Boiler)
- 16A (for -16A application: Electric Underfloor Heating)
Sensor: NTC3950, 10K
Temperature Accuracy: ±0.5°C or ±1°F
Set-Point Range: 5~35°C
Display Temp. Range: 5~99°C
Storage Temperature: -5~45°C
Power Consumption: < 1.5W
Timing Error: < 1%
Housing Material: PC+ABS (Fireproof)
Wires on Terminals: 2 x 1.5 mm² or 1 x 2.5 mm²
Protection Class: IP20
Installation Box: EU or Standard Electric Box
Operating Buttons: Capacitive Touch Buttons
Dimensions: 86.0 x 86.0 x 13.0 mm (display part depth: 26.0 mm)

Ordering Codes:

-3A: Water Heating, 3A, NC+NO+Com output terminals.
-16A: Electric Underfloor Heating, 16A, L+N line voltage output terminals.
-NV: Water/Gas Boiler, 3A, 1 pair of Non-Voltage output terminals.

Usage Features

The thermostat features a user-friendly interface with capacitive touch buttons.

Power On/Off: A dedicated button switches the thermostat on or off.
Temperature Adjustment: Up and down arrow icons allow increasing or decreasing the set-point or parameters.
Time and Weekday Setting: A clock icon is used to set the minute, hour, and weekday (1=Monday, 2=Tuesday, etc.). Parameters are adjusted using the arrow icons and confirmed by pressing the clock icon again to switch to the next parameter.
Lock/Unlock: Pressing both the up and down arrow buttons simultaneously for 5 seconds locks or unlocks the thermostat. The keypad lock type can be configured in the Installer Set-UP (ISU) process.
Mode Switching: The 'M' button switches between Manual and Programmable modes. In manual mode, an 'M' icon appears; in programmable mode, a period icon appears.
Programmable Schedule Configuration: In programmable mode, the 'M' button is pressed, then the clock icon is used to set time and weekday. Touching the clock icon again allows setting the weekday schedule (1-5) and then the weekend schedule (6-7), adjusting time and temperature for each of the six periods using the arrow icons.
Floor Temperature Display: Pressing and holding the down arrow for 5 seconds displays the floor sensor temperature (if connected).
Installer Set-UP (ISU) Process: This advanced configuration mode is accessed by pressing 'M' and the clock icon simultaneously for 5 seconds when the thermostat is off. It allows configuration of:
- Temperature calibration (-9°C to +9°C).
- Dead Zone (0°C to 5°C switching differential).
- Keypad Lock type (all buttons except power, or all buttons).
- Sensor selection (internal, external, or internal with external limit).
- Standby Backlight time (1-60S).
- Max. set-point limit (15°C - 45°C).
- 12/24 hours display.
- Display Mode (both set temp. and room temp., or set temp. only).
- Low Temperature Protection (0°C - 15°C).
- High Temperature Protection (10°C - 70°C).
- Return to Factory settings.

Maintenance Features

Installation: The thermostat features a snap-in design for easy installation and fits EU & Standard Junction Electric Boxes. Installation involves disconnecting power, removing the faceplate, connecting wires to appropriate terminals, fixing the installation plate to the junction box, and then fastening the display part and faceplate.
Warning: A critical warning is provided regarding the risk of electrical shock. Users are advised to disconnect the power supply before making electrical connections and to ensure the power is off by testing the heating/cooling system.
Warranty: Products are warranted for 2 full years from the date of purchase, covering defects not caused by man-made factors. Service outside the warranty period may incur an extra charge. For more details, users are advised to contact Hotowell directly.