LUX Pro PSD111B Non-Programmable Thermostat User Manual

1. Introduction

This manual provides comprehensive instructions for the installation, operation, and maintenance of your LUX Pro PSD111B Non-Programmable Thermostat. This device is designed for residential use to control 1 Heat, 1 Cool HVAC systems, offering reliable and straightforward temperature management.

Figure 1: LUX Pro PSD111B Thermostat Front View

2. Key Features

• Versatile Installation: Can be installed in either horizontal or vertical orientation.
• Clear Display: Features an easy-view backlit display for enhanced readability.
• Battery Operated: Operates on 2 included AA alkaline batteries, ensuring reliable power.
• Temperature Units: Choose between Fahrenheit or Celsius temperature display options.
• Precise Control: Adjustable temperature swing settings with 9-step control for accurate temperature management.
• Safety Limits: Offers adjustable high and low temperature limits for customized comfort control.

Figure 2: Product Features Overview

3. System Compatibility

The LUX Pro PSD111B thermostat is designed for use with most 24-volt gas, oil, or electric heating and air conditioning systems, gas millivolt heating systems, and single-stage heat pumps. It is not compatible with 120-volt heating systems or two-stage heat pumps.

Figure 3: System Compatibility Chart

4. What's in the Box

Your LUX Pro PSD111B Non-Programmable Thermostat package includes the following items:

• PSD111B Thermostat Unit
• 2 ST screws
• 2 wall anchors
• Wire labels
• Instruction Manual
• 2 AA alkaline batteries

Figure 4: Included Components

5. Setup and Installation

Before beginning installation, ensure the power to your HVAC system is turned off at the circuit breaker to prevent electrical shock or damage to the system.

5.1 Mounting the Thermostat

1. Carefully remove your old thermostat. Take a photo of the existing wiring connections for reference.
2. Mount the new thermostat base plate to the wall using the provided screws and anchors. The thermostat can be installed in either horizontal or vertical orientation.
3. Feed wires through the back of the thermostat base and securely mount to the wall with supplied screws and anchors.

Figure 5: Mounting Options

5.2 Wiring Instructions

Refer to the wiring diagrams below for typical hookups. Use the provided wire labels to correctly identify and connect wires from your HVAC system to the corresponding terminals on the thermostat base.

Figure 6: Typical Wiring Diagrams

Figure 7: Detailed Wiring Hookups

5.3 Gas/Electric System Selection

Locate the small switch inside the thermostat unit. Slide the switch to the 'GAS' position for gas heating systems or 'ELEC' for electric heating systems (including heat pumps).

5.4 Battery Installation

Insert the two AA alkaline batteries into the battery compartment located at the bottom of the thermostat. Ensure correct polarity. Remove any protective tabs if present.

5.5 Final Assembly

Once wiring and settings are complete, carefully snap the thermostat front cover onto the mounted base plate. Restore power to your HVAC system at the circuit breaker.

6. Operating Instructions

The PSD111B is a non-programmable thermostat, offering simple manual control over your home's temperature.

6.1 Adjusting Temperature

Use the UP (▲) and DOWN (▼) arrow buttons on the front of the thermostat to set your desired temperature. The display will show the current room temperature and your set temperature.

Figure 8: Simple and Intuitive Control Panel

6.2 System Mode Selection

Use the SYSTEM switch located on the side of the thermostat to select the operating mode:

• HEAT: Activates the heating system when the room temperature falls below your set temperature.
• OFF: Turns off both heating and cooling systems.
• COOL: Activates the cooling system when the room temperature rises above your set temperature.

6.3 Fan Mode Selection

Use the FAN switch located on the side of the thermostat to select the fan operation mode:

• AUTO: The fan runs only when the heating or cooling system is actively operating.
• ON: The fan runs continuously, regardless of whether the heating or cooling system is active.

7. Maintenance

7.1 Battery Replacement

When the battery indicator appears on the display, replace the two AA alkaline batteries promptly. Open the battery compartment at the bottom of the thermostat, remove old batteries, and insert new ones, ensuring correct polarity. The thermostat retains settings during battery changes.

7.2 Cleaning

Clean the thermostat's exterior with a soft, damp cloth. Do not use abrasive cleaners or solvents.

8. Troubleshooting

If your thermostat is not functioning as expected, consider the following:

• No Display: Check if batteries are correctly installed and have sufficient charge. Replace if necessary.
• System Not Responding: Ensure the SYSTEM switch is set to HEAT or COOL, not OFF. Verify the fan switch is in the desired position (AUTO or ON). Check your circuit breaker for the HVAC system.
• Incorrect Temperature Reading: Allow the thermostat to acclimate to the room temperature for at least 15 minutes after installation or significant temperature changes.
• Heating/Cooling Cycles Too Frequently/Infrequently: Adjust the temperature swing settings (9-step control) to fine-tune the cycle frequency.

9. Specifications

10. Warranty and Support

The LUX Pro PSD111B Non-Programmable Thermostat comes with a 5-year limited warranty. For support or warranty claims, please refer to the contact information provided in your owner's manual or visit the official LUX website.