1. Киришүү
This manual provides instructions for the installation, operation, and maintenance of the Venstar T8850 ColorTouch Commercial Thermostat. The T8850 is a digital thermostat designed for commercial applications, offering up to 4 Heat and 2 Cool Stages. It supports gas, electric, or heat pump control systems and features WiFi connectivity for remote management. Users can switch between programmable and non-programmable modes for flexible temperature control.

Сүрөт 1: Алдыңкы view of the Venstar T8850 ColorTouch Thermostat, displaying its sleek design and digital screen.
Негизги өзгөчөлүктөрү:
- ColorTouch digital display for intuitive control.
- Up to 4 Heat and 2 Cool Stages for comprehensive climate management.
- Compatibility with gas, electric, and heat pump systems.
- Integrated WiFi for remote access and control via a dedicated phone app.
- Switchable programmable and non-programmable modes.
- 7-Day Programmable scheduling and 365-day calendar.
- Weather tracking, Preoccupancy Fan Purge, and up to 4 hours override.
- Нымсыздандырууну көзөмөлдөө.
2. Орнотуу жана орнотуу
Proper installation is crucial for the optimal performance of your Venstar T8850 thermostat. It is recommended that installation be performed by a qualified HVAC technician. Ensure power to the HVAC system is turned off at the circuit breaker before beginning installation.
2.1 Таңгактан чыгаруу жана текшерүү
Carefully remove the thermostat from its packaging. Inspect all components for any signs of damage. The package should contain the thermostat unit and the backplate/mounting bracket.

Figure 2: The Venstar T8850 Thermostat alongside its retail packaging, illustrating the product's presentation.
2.2 Термостатты орнотуу
- Өчүрүү: Disconnect power to the heating and cooling system at the main fuse or circuit breaker panel.
- Эски термостатты алып салуу: Carefully remove your old thermostat from the wall. Note the wiring connections before disconnecting them.
- Mount Backplate: Secure the Venstar T8850 backplate to the wall using the provided screws. Ensure it is level.
- Зымдар: Connect the system wires to the appropriate terminals on the backplate. Refer to the wiring diagram provided with your specific installation guide for detailed connections. The T8850 supports various HVAC system types.

3-сүрөт: Арткы view of the Venstar T8850 thermostat, revealing the circuit board and clearly labeled wiring terminals for system connection.
2.3 Баштапкы иштетүү жана конфигурация
- Күчтү калыбына келтирүү: Once wiring is complete and secure, restore power to the HVAC system.
- Баштапкы орнотуу: The thermostat will guide you through an initial setup process on its ColorTouch display. This includes setting the time, date, and basic system parameters.
- WiFi туташуусу: Navigate to the settings menu to connect your thermostat to your local WiFi network. This enables remote control and access to advanced features via the Venstar phone app.
3. Операция
The Venstar T8850 features an intuitive ColorTouch display for easy operation. The main screen typically shows the current room temperature, desired setpoint, and current operating mode.
3.1 Температураны жөндөө
- On the main screen, touch the "Warmer" or "Cooler" buttons to adjust the desired temperature setpoint.
- The display will show the current room temperature and the new setpoint.
3.2 Changing Operating Modes
- Press the "Mode" button on the display to cycle through available operating modes:
- Муздатуу: Activates the air conditioning system.
- Жылытуу: Жылытуу системасын иштетет.
- Авто: Automatically switches between heating and cooling to maintain the set temperature range.
- Өчүк: Turns off the HVAC system.
3.3 Menu and Advanced Settings
Press the "Menu" button to access advanced settings and features. These include:
- График: Set up 7-day programmable schedules for automated temperature adjustments.
- Акылдуу күйөрман: Optimize fan operation for comfort and energy efficiency.
- Экран сактагыч: Customize the display screensaver.
- Эскертүүлөр: Configure notifications for system events.
- Дисплей: Adjust display brightness and other visual settings.
- Тандоолору: Personalize various thermostat behaviors.
- Убакыт жана дата коюу: Manually adjust time and date if not automatically synchronized.
- Vacation/Away: Set specific temperature profiles for periods of absence.
- Коопсуздук: Implement security features to prevent unauthorized changes.
- Маалымат: View системалык маалымат жана диагностика.
- Орнотуулар: Access system-level configurations.
3.4 Remote Control via Phone App
Once connected to WiFi, download the Venstar phone application to control your T8850 thermostat remotely. The app allows you to adjust settings, monitor temperatures, and manage schedules from anywhere.
4. Техникалык тейлөө
Regular maintenance ensures the longevity and efficient operation of your Venstar T8850 thermostat.
4.1 Термостатты тазалоо
- Wipe the screen and exterior casing жумшак менен, гamp кездеме.
- Avoid using abrasive cleaners, solvents, or chemical sprays, as these can damage the display or casing.
4.2 Системалык текшерүүлөр
- Periodically check the wiring connections at the backplate to ensure they are secure.
- Ensure the thermostat is free from dust and debris, especially around any ventilation openings.
4.3 Температураны калибрлөө
If you notice a discrepancy between the thermostat's displayed temperature and the actual room temperature (measured by an independent thermometer), you may need to calibrate the internal sensor. This can typically be adjusted within the thermostat's advanced settings menu. Consult the full Venstar T8850 technical documentation for precise calibration steps.
5. Кыйынчылыктарды
This section addresses common issues you might encounter with your Venstar T8850 thermostat.
5.1 Thermostat Not Responding / Blank Display
- Күчтү текшерүү: Ensure the HVAC system's power is on at the circuit breaker.
- Зымдар: Verify all wiring connections are secure at the backplate.
5.2 WiFi Connectivity Issues
- Маршрутизатор текшерүү: Ensure your WiFi router is powered on and functioning correctly.
- Сигнал күчү: Check the WiFi signal strength displayed on the thermostat. If weak, consider relocating the router or using a WiFi extender.
- Кайра жүктөө: Try restarting your WiFi router and then the thermostat (by temporarily cutting power to the HVAC system).
- Reconfigure WiFi: Go to the thermostat's settings menu and reconfigure the WiFi connection.
5.3 Температуранын туура эмес көрсөткүчтөрү
- Сенсор тоскоолдугу: Ensure no objects are blocking the thermostat's internal temperature sensor (e.g., furniture, curtains).
- Калибрлөө: Refer to Section 4.3 on Temperature Calibration to adjust the sensor offset if necessary.
5.4 HVAC System Not Responding to Thermostat
- Режим тандоо: Verify the thermostat is set to the correct operating mode (Heat, Cool, Auto).
- Орнотуу пункту: Ensure the desired temperature setpoint is appropriately above (for heating) or below (for cooling) the current room temperature.
- Системанын күчү: Confirm the HVAC system itself has power and is operational.
- Кесиптик жардам: Эгер маселе чечилбесе, квалификациялуу HVAC техникине кайрылыңыз.
6. Техникалык шарттар
| Өзгөчөлүк | Деталь |
|---|---|
| Бренд | Venstar |
| Модель аты | Commercial ColorTouch Thermostat |
| Модель номери | T8850 |
| Controller Type | Push Button |
| Байланыш технологиясы | Wi-Fi, Wireless (Wi-Fi) |
| Power Source | Электр |
| Тtage | 3 вольт |
| Элемент Салмагы | 8 унция |
| Продукциянын өлчөмдөрү | 2 x 6.2 x 4.7 дюйм |
| Дисплей түрү | Санарип |
| Арткы жарык | Ооба |
| Монтаж түрү | Дубалга орнотуу |
| Өзгөчөлүктөр | Phone App Available, Temperature Sensor, Dehumidification Control, 7-Day Programmable, 365 Day Calendar, Weather Tracking, Preoccupancy Fan Purge, Up to 4 Hours Override |
7. Кепилдик жана колдоо
7.1 Өндүрүүчүнүн кепилдиги
The Venstar T8850 Commercial Thermostat comes with a 1 жылдык өндүрүүчүнүн кепилдиги. Бул кепилдик нормалдуу колдонуудагы материалдардагы жана жасалгадагы кемчиликтерди камтыйт. Кепилдик дооматтары үчүн сатып алганыңыздын далилин сактап коюңуз.
7.2 Техникалык колдоо
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact Venstar customer support. Refer to the official Venstar webакыркы байланыш маалыматы үчүн сайт же продукт таңгак.
When contacting support, please have your thermostat model number (T8850) and a description of the issue ready.





