1. المقدمة
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.

الشكل 1: الجبهة view of the Venstar T8850 ColorTouch Thermostat, displaying its sleek design and digital screen.
المميزات الرئيسية:
- 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.
- التحكم في إزالة الرطوبة.
2. الإعداد والتثبيت
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 فك العبوة والتفتيش
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 تركيب منظم الحرارة
- إيقاف التشغيل: Disconnect power to the heating and cooling system at the main fuse or circuit breaker panel.
- إزالة منظم الحرارة القديم: 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.
- التوصيلات الكهربائية: 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.

الشكل 3: خلفي view of the Venstar T8850 thermostat, revealing the circuit board and clearly labeled wiring terminals for system connection.
2.3 التشغيل الأولي والتكوين
- اعادة الطاقة: Once wiring is complete and secure, restore power to the HVAC system.
- الإعداد الأولي: The thermostat will guide you through an initial setup process on its ColorTouch display. This includes setting the time, date, and basic system parameters.
- اتصال واي فاي: 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. التشغيل
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 ضبط درجة الحرارة
- 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 تغيير أوضاع التشغيل
- Press the "Mode" button on the display to cycle through available operating modes:
- تبريد: Activates the air conditioning system.
- التدفئة: يقوم بتنشيط نظام التدفئة.
- آلي: يقوم الجهاز بالتبديل تلقائيًا بين التدفئة والتبريد للحفاظ على نطاق درجة الحرارة المحدد.
- عن: Turns off the HVAC system.
3.3 Menu and Advanced Settings
Press the "Menu" button to access advanced settings and features. These include:
- جدول: Set up 7-day programmable schedules for automated temperature adjustments.
- مروحة ذكية: Optimize fan operation for comfort and energy efficiency.
- حافظة الشاشة: Customize the display screensaver.
- التنبيهات: Configure notifications for system events.
- عرض: Adjust display brightness and other visual settings.
- التفضيلات: Personalize various thermostat behaviors.
- ضبط الوقت والتاريخ: Manually adjust time and date if not automatically synchronized.
- Vacation/Away: Set specific temperature profiles for periods of absence.
- حماية: Implement security features to prevent unauthorized changes.
- معلومة: View معلومات النظام والتشخيصات.
- إعدادات: 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. الصيانة
Regular maintenance ensures the longevity and efficient operation of your Venstar T8850 thermostat.
4.1 تنظيف منظم الحرارة
- Wipe the screen and exterior casing مع لينة، damp قطعة قماش.
- Avoid using abrasive cleaners, solvents, or chemical sprays, as these can damage the display or casing.
4.2 فحوصات النظام
- 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 معايرة درجة الحرارة
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. استكشاف الأخطاء وإصلاحها
This section addresses common issues you might encounter with your Venstar T8850 thermostat.
5.1 Thermostat Not Responding / Blank Display
- التحقق من الطاقة: تأكد من تشغيل الطاقة لنظام التكييف والتهوية من خلال قاطع الدائرة.
- التوصيلات الكهربائية: Verify all wiring connections are secure at the backplate.
5.2 WiFi Connectivity Issues
- فحص جهاز التوجيه: Ensure your WiFi router is powered on and functioning correctly.
- قوة الإشارة: Check the WiFi signal strength displayed on the thermostat. If weak, consider relocating the router or using a WiFi extender.
- إعادة التشغيل: 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 قراءات درجة الحرارة غير الصحيحة
- انسداد المستشعر: Ensure no objects are blocking the thermostat's internal temperature sensor (e.g., furniture, curtains).
- معايرة: Refer to Section 4.3 on Temperature Calibration to adjust the sensor offset if necessary.
5.4 HVAC System Not Responding to Thermostat
- اختيار الوضع: Verify the thermostat is set to the correct operating mode (Heat, Cool, Auto).
- تعيين نقطة: Ensure the desired temperature setpoint is appropriately above (for heating) or below (for cooling) the current room temperature.
- قوة النظام: Confirm the HVAC system itself has power and is operational.
- المساعدة المهنية: إذا استمرت المشكلة، فاتصل بفني تكييف وتدفئة مؤهل.
6. المواصفات
| ميزة | التفاصيل |
|---|---|
| ماركة | Venstar |
| اسم الموديل | Commercial ColorTouch Thermostat |
| رقم الموديل | ت8850 |
| نوع وحدة التحكم | زر |
| تكنولوجيا الاتصال | Wi-Fi, Wireless (Wi-Fi) |
| مصدر الطاقة | كهربائي |
| المجلدtage | 3 فولت |
| وزن العنصر | 8 أونصات |
| أبعاد المنتج | 2 × 6.2 × 4.7 بوصة |
| نوع العرض | رقمي |
| الإضاءة الخلفية | نعم |
| نوع التركيب | حامل الحائط |
| المميزات الخاصة | Phone App Available, Temperature Sensor, Dehumidification Control, 7-Day Programmable, 365 Day Calendar, Weather Tracking, Preoccupancy Fan Purge, Up to 4 Hours Override |
7. الضمان والدعم
7.1 ضمان الشركة المصنعة
The Venstar T8850 Commercial Thermostat comes with a ضمان الشركة المصنعة لمدة عامينيغطي هذا الضمان عيوب المواد والتصنيع في ظل الاستخدام العادي. يُرجى الاحتفاظ بإيصال الشراء للمطالبة بالضمان.
7.2 الدعم الفني
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact Venstar customer support. Refer to the official Venstar webقم بزيارة الموقع أو عبوة المنتج للحصول على أحدث معلومات الاتصال.
When contacting support, please have your thermostat model number (T8850) and a description of the issue ready.





