drayton digistat scr instructions manual
Drayton Digistat SCR Instructions Manual: A Comprehensive Guide
This manual provides detailed guidance for installing, commissioning, and operating the Drayton Digistat SCR wireless heating control system, ensuring optimal performance and user experience.
The Drayton Digistat SCR system represents a modern approach to home heating control, offering wireless convenience and precise temperature management. This system combines a programmable thermostat – either the 2RF or 3RF model – with a dedicated SCR receiver unit. This pairing allows for remote control and scheduling of your heating, enhancing comfort and potentially reducing energy consumption.
Designed for ease of installation and use, the Digistat SCR is suitable for a wide range of heating systems. Understanding the components and their interaction is crucial for successful setup and operation. This guide will walk you through each step, from initial installation to advanced configuration, ensuring a seamless experience with your new heating control system.

What is the Drayton Digistat SCR?
The Drayton Digistat SCR is a wireless receiver designed to interface with Drayton’s Digistat 2RF or 3RF programmable room thermostats. Essentially, it acts as a bridge, translating the wireless signals from the thermostat into commands for your central heating system. It allows for independent control of heating zones within a property, offering flexibility and efficiency.

The ‘SCR’ designation stands for System Control Receiver. It’s a key component in creating a modern, responsive heating setup. Unlike traditional wired thermostats, the Digistat SCR system eliminates the need for complex wiring runs, simplifying installation. It’s compatible with various heating systems, providing a versatile solution for both new installations and retrofits.
Digistat 2RF vs. Digistat 3RF: Key Differences
While both the Digistat 2RF and 3RF offer wireless control of your heating, the 3RF represents a significant upgrade. The primary difference lies in the communication protocol; the 3RF utilizes a more robust and reliable 868MHz signal, reducing interference and improving range compared to the 2RF’s 433MHz frequency.
The Digistat 3RF also boasts enhanced features like a larger, clearer display, and more advanced programming options. It offers improved energy saving capabilities and compatibility with Drayton’s Wiser multi-zone heating system. Although the 2RF remains a functional option, the 3RF provides a more modern, dependable, and feature-rich experience for optimal heating control.

Installation Process
Proper installation of the SCR receiver and Digistat thermostat is crucial for reliable operation. Follow these steps carefully, ensuring electrical safety throughout the process.
Installing the SCR Receiver
The SCR receiver forms the central hub of the wireless heating control system, communicating with the Digistat thermostat. Begin by selecting a suitable location for the receiver, considering proximity to the boiler and a stable power supply. Ensure the chosen location adheres to the specified wallplate clearances to avoid interference and maintain optimal signal strength.
Before proceeding with electrical connections, always isolate the power supply to the heating system. Connect the receiver according to the wiring diagram, paying close attention to live, neutral, and earth connections. Incorrect wiring can damage the receiver or the heating system. Double-check all connections before restoring power, and verify the receiver’s indicator light illuminates, confirming it’s receiving power.
SCR Receiver Wallplate Clearances
Maintaining adequate clearances around the SCR receiver wallplate is crucial for reliable wireless communication and preventing operational issues. Ensure a minimum of 20cm (8 inches) of clear space above, below, and to the sides of the wallplate. Avoid mounting the receiver directly onto metal surfaces, as these can significantly impede the wireless signal.
Keep the wallplate away from large metallic objects like water pipes, ductwork, and electrical switchboards. These obstructions can cause signal interference and reduce the range of the wireless connection. Also, avoid areas with high electrical noise, such as near fluorescent lights or microwave ovens. Proper clearance ensures a stable and consistent link between the receiver and the Digistat thermostat.
Electrical Connections for the SCR Receiver
Before making any electrical connections, always isolate the power supply to the heating system. The SCR receiver requires a 230V AC supply. Connect the Live (L) and Neutral (N) wires to the appropriately marked terminals on the receiver. Ensure the earth wire is securely connected to the earth terminal for safety.
The receiver also has connections for the boiler or heating zone control output. Connect the appropriate wires according to your system wiring diagram. Double-check all connections for tightness and correct polarity before restoring power. Incorrect wiring can damage the receiver or the heating system. If unsure, consult a qualified heating engineer.
Installing the Digistat Programmable Thermostat
The Digistat thermostat installation involves selecting an optimal location, verifying wireless signal strength, and the physical mounting of the unit. Choose a location away from direct sunlight, drafts, and heat sources for accurate temperature readings. Ensure the chosen spot is within range of the SCR receiver, confirmed by a strong wireless signal.
Once confirmed, mark the screw holes on the wall, drill pilot holes, and securely mount the backplate. Carefully connect the wiring, if applicable, and then attach the Digistat unit to the backplate. Proper installation ensures reliable communication and accurate temperature control.
Optimal Location for the Digistat Thermostat
Selecting the right location is crucial for accurate temperature control. Avoid placing the Digistat in direct sunlight, near heat-generating appliances (like TVs or lamps), or in areas prone to drafts from doors or windows. Internal walls generally provide more stable readings than exterior walls.
The ideal height is approximately 1.5 meters (5 feet) from the floor. Ensure the thermostat isn’t concealed by furniture or curtains, hindering airflow. A central location within the room is preferred, representing the average temperature effectively. Prioritize a spot that reflects the desired comfort level for the space.
Checking Wireless Signal Strength
After installing the SCR receiver and Digistat, verifying a strong wireless connection is essential for reliable operation. The Digistat display will indicate the signal strength, typically represented by bars or a percentage. A weak signal can cause communication issues and inaccurate temperature control.
If the signal is weak, try repositioning the SCR receiver closer to the Digistat. Avoid obstructions like thick walls or metal objects that can interfere with the radio frequency. Consider using a signal repeater if the distance is significant or interference is unavoidable. A stable, strong signal ensures seamless control of your heating system.
Physical Installation of the Digistat Unit
Once the location is determined and the wireless signal is confirmed, proceed with the physical installation of the Digistat. Gently remove the front cover of the thermostat unit to access the terminal connections. Carefully connect the wires from your heating system to the appropriate terminals on the Digistat backplate, referencing the wiring diagram.
Ensure all connections are secure and that no bare wires are exposed. Once wired, carefully reattach the Digistat unit to the backplate. Finally, restore power to the system and verify the display illuminates, indicating successful installation. Double-check all connections before proceeding.

Commissioning the Wireless System
This stage involves pairing the Digistat thermostat with the SCR receiver, establishing reliable wireless communication for remote temperature control and efficient heating management.
Pairing the Digistat with the SCR Receiver
Successfully pairing your Drayton Digistat with the SCR receiver is crucial for wireless operation. Begin by ensuring the SCR receiver is powered on and within range of the Digistat. On the Digistat thermostat, navigate to the ‘pairing’ or ‘link’ function within the settings menu – consult the Digistat’s display for specific button sequences.
Simultaneously, initiate the pairing mode on the SCR receiver; this often involves pressing a specific button on the receiver unit itself. The Digistat will then search for the SCR receiver, and upon detection, a confirmation message will appear on the Digistat’s screen.
Allow a short period for the connection to establish. If pairing fails, repeat the process, ensuring both devices are close to each other and free from interference.
Initial System Testing
After successfully pairing the Digistat and SCR receiver, thorough system testing is essential. Begin by setting a temporary heating schedule on the Digistat, requesting heat. Verify that the central heating system responds accordingly – the boiler should ignite, and radiators should begin to warm.
Observe the Digistat’s display to confirm it accurately reflects the current room temperature and the system’s operational status. Cycle through different temperature settings and observe the system’s response time.
Test the ‘off’ function to ensure the heating system shuts down completely. Confirm the wireless communication remains stable throughout the testing process, ensuring reliable control.

Understanding Digistat Features & Settings
Explore the Digistat’s intuitive interface for programming schedules, setting precise temperatures, and utilizing convenient hold functions for customized heating control and comfort.
Programming Temperature Schedules
The Drayton Digistat allows for highly customizable temperature schedules, enabling efficient heating management tailored to your lifestyle. Access the programming mode through the thermostat’s menu system. You can define different temperature setpoints for various times of the day and days of the week.
Typically, you’ll establish schedules with comfort temperatures during occupied hours and reduced temperatures during sleep or absence. The Digistat often supports multiple programs, allowing for distinct schedules for weekdays and weekends. Consider creating a schedule that aligns with your daily routines to maximize energy savings and maintain a comfortable indoor environment. Remember to save your programmed schedule after making adjustments.
Experiment with different settings to find the optimal balance between comfort and efficiency. The system’s ability to adapt to your needs is a key benefit.

Setting Time and Date
Accurate time and date settings are crucial for the correct operation of the Digistat’s scheduling functions. Access the time and date setting menu through the thermostat’s interface, usually navigated via buttons or a dial. The Digistat typically allows you to adjust both the current time and the date, ensuring synchronization with your local time zone.
Pay close attention to the AM/PM designation when setting the time. Incorrect time settings will result in programmed schedules activating at the wrong times, impacting heating efficiency and comfort. After setting the time and date, confirm your changes and save them within the Digistat’s menu.
Regularly check these settings, especially after power outages or daylight saving time adjustments.
Utilizing the Hold Function
The ‘Hold’ function on the Drayton Digistat allows you to temporarily override the programmed heating schedule. This is useful for situations where your routine deviates from the norm, such as unexpected guests or changes in occupancy. Activating ‘Hold’ maintains a constant temperature until manually cancelled or a specified duration elapses.
Typically, you can select a ‘Hold’ duration – for example, until the next scheduled program point, or for a set number of hours. The Digistat will clearly indicate when the ‘Hold’ function is active, often with an icon on the display. Remember to deactivate ‘Hold’ to resume the normal programmed schedule.
Using ‘Hold’ efficiently prevents unnecessary heating when the building is unoccupied.

Advanced Settings & Options
Explore specialized configurations within the Drayton Digistat, including installer options, freeze protection settings, and features designed to maximize your heating system’s efficiency.
Installer Options & Configuration
The Drayton Digistat SCR offers a range of installer-specific settings to fine-tune system performance. Accessing these options allows for customized configurations tailored to the specific installation environment and homeowner preferences. Key settings include boiler modulation control, enabling precise temperature regulation and energy savings.
Furthermore, installers can adjust system parameters like the differential temperature, influencing switching accuracy. Detailed configuration of the receiver unit is also possible, optimizing wireless communication and ensuring reliable operation. These advanced settings require a thorough understanding of the heating system and the Digistat’s capabilities, allowing professionals to deliver a truly optimized and efficient heating solution for their clients. Proper configuration is crucial for long-term system reliability.
Freeze Protection Settings
The Drayton Digistat SCR incorporates crucial freeze protection features to safeguard your heating system during periods of extremely cold weather. These settings automatically activate the boiler if the temperature within the property drops to a pre-defined level, typically around 5°C. This prevents pipes from freezing and potentially bursting, minimizing costly damage and disruption.
Installers can configure the freeze protection threshold to suit the specific climate and property insulation levels. It’s vital to ensure this feature is correctly enabled, particularly in unoccupied properties or those prone to cold snaps. The system will override normal programming to prioritize preventing freezing, offering peace of mind during harsh winter conditions. Regular checks of these settings are recommended.
Optimizing System Efficiency
Maximizing the efficiency of your Drayton Digistat SCR system involves careful programming and utilization of its features. Implement personalized heating schedules that align with occupancy patterns, reducing energy consumption when the property is unoccupied or during sleep hours. Utilize the ‘Hold’ function strategically for short-term temperature adjustments, avoiding prolonged overrides of the programmed schedule.
Regularly review and refine your temperature settings, lowering them by even a single degree can yield significant energy savings. Ensure the thermostat is located away from direct sunlight or draughts for accurate readings. Consider utilizing advanced installer options to fine-tune system parameters for optimal performance and minimize wasted energy, contributing to lower heating bills.

Troubleshooting Common Issues
This section details solutions for typical problems encountered with the Drayton Digistat SCR system, including communication errors, inaccurate readings, and display malfunctions.
Digistat Not Communicating with SCR
If the Digistat fails to communicate with the SCR receiver, begin by verifying the batteries within the thermostat unit are fresh and correctly installed. Ensure the SCR receiver is powered on and within a reasonable range of the Digistat – excessive distance or obstructions can interfere with the wireless signal.
Attempt re-pairing the Digistat with the SCR receiver following the instructions in the ‘Pairing the Digistat with the SCR Receiver’ section. Check for potential interference from other wireless devices operating on the same frequency. A weak signal strength, as indicated during the pairing process, suggests relocation of either the Digistat or the SCR receiver might be necessary; Finally, confirm there are no physical obstructions blocking the signal path.
Incorrect Temperature Readings
If the Digistat displays inaccurate temperature readings, first ensure it isn’t directly exposed to drafts, sunlight, or other heat sources that could artificially inflate the temperature. Verify the thermostat is mounted on an internal wall, away from external influences.
Check for proper airflow around the unit; obstructions can cause localized temperature variations. Compare the Digistat’s reading with a calibrated thermometer to confirm the discrepancy. If the issue persists, recalibrate the temperature sensor within the Digistat’s settings (refer to ‘Advanced Settings & Options’). Consider the possibility of a faulty temperature sensor, requiring professional assessment or replacement.
Display Issues & Solutions
A blank or dimly lit Digistat display usually indicates low batteries; replace them immediately with fresh alkaline batteries. If the display is flickering or showing distorted characters, try resetting the unit by briefly removing and reinserting the batteries. Ensure the battery contacts are clean and making good connection.
For a frozen display, a full reset might be necessary – consult the ‘Commissioning the Wireless System’ section for pairing instructions. If the problem continues after battery replacement and resetting, there may be an internal fault requiring professional repair or replacement of the Digistat unit.

Safety Information & Warnings
Installation must be performed by a qualified professional, adhering to all local electrical regulations, to prevent hazards and ensure system safety.
Electrical Safety Precautions
Crucially, always disconnect the main power supply to the heating system before commencing any electrical work on the Drayton Digistat SCR receiver or wiring. Never work on live circuits. Ensure the receiver is correctly earthed according to local wiring regulations. Incorrect wiring can lead to electric shock or fire hazards. Verify that the voltage supply matches the receiver’s requirements. Use appropriately sized and rated cables for all connections. Inspect all wiring for damage before connecting. Avoid creating loose connections or exposed wires. If unsure about any electrical aspect, consult a qualified electrician. Regularly check connections for tightness. Remember, electrical safety is paramount for both installer and end-user protection.
General Usage Warnings
Always ensure the Digistat thermostat is used within its specified operating temperature and humidity ranges. Do not expose the unit to direct sunlight, extreme temperatures, or moisture. Avoid placing heavy objects on or near the thermostat, as this could cause damage. Regularly clean the Digistat with a soft, dry cloth – never use abrasive cleaners or solvents. Keep the thermostat out of reach of children. Do not attempt to disassemble or repair the unit yourself; refer servicing to qualified personnel. Be aware that prolonged use of ‘Hold’ functions can impact energy efficiency. Monitor system performance regularly and report any unusual behavior.









































































