Watts BT-DP Digital Programmable Room Thermostat User Manual

1. Introduction

The Watts BT-DP Digital Programmable Room Thermostat is designed for regulating most heating installations, including boilers and heat pumps. This manual provides essential information for proper installation, operation, and maintenance to ensure optimal performance and longevity of your device.

2. Product Overview

This image displays the Watts BT-DP Digital Programmable Room Thermostat. It features a clear digital screen showing temperature and mode, along with intuitive control buttons for adjustment and selection.

Key Features:

• 2-wire thermostat with digital display.
• Temperature adjustment via +/- buttons.
• Ability to preview deposit or room temperature.
• Large, backlit screen for enhanced visibility.
• Simplified weekly programming using pictograms.
• Multiple operating modes: Comfort, Reduced, Frost Protection, Holiday, Timer, Stop.
• Power supply: 2 x 1.5V AAA batteries.
• Output: Potential-free relay (250 VAC/5 A).
• Connection: 2-point pluggable terminal block.
• Temperature setting range: 5 °C to 30 °C.
• Circuit breaker up to 20 °C: 0.5 °C.
• Protection class: IP30.
• Optional: External flow sensor.

3. Setup and Installation

Installation should be performed by a qualified professional. Ensure power is disconnected before commencing any installation work.

3.1. Power Supply

• Insert 2 x 1.5V AAA batteries into the designated compartment. Observe correct polarity as indicated inside the compartment.

3.2. Wiring Connection

• Connect the thermostat to your heating system using the 2-point pluggable terminal block.
• Refer to your heating system's manual for specific wiring diagrams. The output is a potential-free relay (250 VAC/5 A).

3.3. Mounting

• Mount the thermostat in a suitable location, away from direct sunlight, drafts, or heat sources, to ensure accurate temperature readings.
• The device has an IP30 protection class, meaning it is protected against solid objects over 2.5mm but not against water.

4. Operating Instructions

The large, backlit digital screen displays current temperature and operating status. Use the +/- buttons to adjust temperature settings and navigate menus.

4.1. Setting Temperature

• Press the +/- buttons to increase or decrease the desired temperature.
• The temperature can be set within a range of 5 °C to 30 °C.

4.2. Programming Weekly Schedule

• The thermostat supports simplified weekly programming using pictograms.
• Consult the complete product manual for detailed, step-by-step instructions on setting up your personalized weekly schedule.

4.3. Operating Modes

To switch between modes, navigate through the menu using the appropriate buttons (refer to the full manual for specific button functions).

• Comfort Mode: Maintains a comfortable, user-defined temperature.
• Reduced Mode: Maintains a lower, energy-saving temperature.
• Frost Protection Mode: Prevents freezing by maintaining a minimum temperature (e.g., 5 °C).
• Holiday Mode: Sets a specific temperature for an extended period, useful when away from home.
• Timer Mode: Allows for temporary temperature adjustments for a set duration.
• Stop Mode: Turns off heating control.

5. Maintenance

5.1. Battery Replacement

• Regularly check the battery level. Replace the 2 x 1.5V AAA batteries when the low battery indicator appears on the display.
• Ensure correct polarity during replacement.

5.2. Cleaning

• Clean the thermostat's exterior with a soft, dry cloth. Do not use abrasive cleaners, solvents, or chemical sprays.
• Ensure the thermostat's vents are free from dust and obstructions to maintain accurate temperature sensing.

6. Troubleshooting

• No Display: Check battery installation and charge. Replace batteries if necessary.
• Incorrect Temperature Reading: Ensure the thermostat is not exposed to direct sunlight, drafts, or heat sources. Verify proper mounting location.
• Heating Not Activating: Check the selected operating mode and set temperature. Ensure the thermostat is correctly wired to the heating system. Verify the relay output connection.
• Programming Issues: Refer to the detailed programming section in the complete product manual for step-by-step instructions.
• If problems persist after following these steps, contact Watts customer support or a qualified technician.

7. Specifications

8. Warranty and Support

For warranty information, technical support, or service inquiries, please refer to the official Watts website or contact their customer service department. Keep your purchase receipt as proof of purchase.