1. Introduction
The PRO1IAQ T855iSH WiFi Thermostat offers advanced climate control for your home. This 7-day programmable thermostat features auto changeover, easy menu-driven programming, and intuitive icons for wake, leave, return, and sleep settings. With its 8 sq. inch blue backlit display and Wi-Fi connectivity, managing your home's temperature has never been easier. This manual provides detailed instructions for installation, operation, and maintenance to ensure optimal performance.
2. Key Features
- 7-Day or 5/1/1 Programmable Scheduling
- Auto Changeover between heating and cooling
- Easy Menu-Driven Programming
- Intuitive Wake, Leave, Return, Sleep programming icons
- 8 sq. inch Blue Backlit Display for clear visibility
- Glow-in-the-dark light button for easy access in low light
- Programmable Fan settings
- Electric or Gas system configurable
- Room Temperature Calibration Adjustment
- Separate Heating and Cooling Swing (Cycle Rate) Adjustments
- Keypad Lockout for security
- Heating and Cooling Setpoint Limits
- 5-minute Compressor Delay Protection (selectable on or off)
- Filter Change Indicator (selectable on or off)
- Easy wire color-coded terminal blocks for simplified installation
- Universal Sub-Base for versatile mounting
- 24V Power (Hardwire Only)
3. Setup and Installation
Before beginning installation, ensure power to your HVAC system is turned off at the circuit breaker. This thermostat is designed for 24V hardwire systems and can be mounted on a wall or junction box.
3.1 Wiring Instructions
The thermostat features easy wire color-coded terminal blocks. Refer to the diagram below for proper connection. It is recommended to photograph your existing thermostat's wiring before disconnecting any wires for reference.
- C: Common wire (24VAC)
- B: Reversing valve for heat pump (energized in heat)
- W: Heat stage 1
- W2: Heat stage 2
- S1/S2: Remote sensor (if applicable)
- RH: Power for heating (jumpered to RC if single transformer)
- RC: Power for cooling (jumpered to RH if single transformer)
- G: Fan relay
- Y: Cool stage 1
- Y2: Cool stage 2
- D: Dehumidifier (if applicable)
Caution: Do not overtighten screws. Maximum torque = 6 in-lbs.
3.2 Battery Installation
The thermostat uses AA batteries for backup power. To install or replace batteries, open the compartment located at the bottom of the unit. Ensure correct polarity.
Video 1: Demonstrates how to access the control buttons and battery compartment on the thermostat.
Note: Replace AA batteries when a low battery indicator shows on the display.
3.3 Wi-Fi Setup
The T855iSH is a Wi-Fi enabled thermostat. Follow the instructions in the full operating manual or the accompanying app for connecting your thermostat to your home Wi-Fi network and controlling it remotely.
4. Operating Instructions
The thermostat features an intuitive interface for easy temperature control and scheduling.
4.1 Basic Temperature Adjustment
Use the + and - buttons on the side of the thermostat to increase or decrease the set temperature. The display will show both the current room temperature and your desired set temperature.
Video 2: Demonstrates basic temperature adjustment and menu navigation on the thermostat.
4.2 Mode Selection
Access the system mode options (Cool, Off, Heat) via the buttons located behind the front panel. This allows you to switch between cooling, heating, or turning the system off.
4.3 Fan Operation
The fan can be set to ON (continuous operation) or AUTO (operates only when heating or cooling is active). A programmable fan option is also available for customized schedules.
4.4 Programming Schedules
The thermostat supports 7-day or 5/1/1 programmable schedules. Use the menu-driven interface to set specific temperatures for different times of the day (Wake, Leave, Return, Sleep) to optimize comfort and energy savings.
5. Maintenance
5.1 Filter Change Indicator
The thermostat features a selectable filter change indicator. When activated, it will remind you when it's time to replace your HVAC system's air filter, ensuring efficient operation and air quality.
5.2 Battery Replacement
When the low battery indicator appears on the display, replace the two AA alkaline batteries in the compartment at the bottom of the thermostat. Refer to Video 1 for guidance on accessing the battery compartment.
6. Troubleshooting
If you encounter issues with your thermostat, consider the following common solutions:
- No Power/Blank Display: Check the circuit breaker for your HVAC system. Ensure batteries are correctly installed and not depleted.
- System Not Responding: Verify that the system mode (Heat/Cool/Off) and fan settings (On/Auto) are correctly selected. Check wiring connections.
- Temperature Inaccuracy: Adjust the room temperature calibration setting in the thermostat's menu if you suspect the displayed temperature is incorrect.
- Wi-Fi Connectivity Issues: Ensure your home Wi-Fi network is active. Re-attempt Wi-Fi setup through the thermostat's menu or the companion app.
- Keypad Lockout: If the keypad is unresponsive, check if the keypad lockout feature is enabled. Disable it through the thermostat's menu or the app.
For more detailed troubleshooting, consult the full operating manual or contact customer support.
7. Specifications
| Brand | PRO1IAQ |
| Model Number | T855i |
| Controller Type | Push Button |
| Special Feature | Low Voltage, Programmable |
| Color | White |
| Specific Uses For Product | Heat Pump |
| Temperature Control Type | Programmable |
| Connectivity Technology | Wi-Fi |
| Power Source | Hardwire Only |
| Voltage | 24 Volts |
| Material | Plastic |
| Display Type | Digital |
| Screen Size | 2.83 Inches (8 sq. inch display) |
| Mounting Type | Wall Mount |
| Product Dimensions | 1.1 x 4.7 x 4.4 inches |
| Item Weight | 10.9 ounces |
8. Warranty and Support
For warranty information, technical support, or further assistance, please refer to the official PRO1IAQ website or contact their customer service. Keep your purchase receipt for warranty claims.
PRO1IAQ Customer Service: 1-800-776-1559
Website: www.pro1iaq.com
