Greenbrook Electrical Timer Manual: A Comprehensive Guide
Greenbrook timers‚ including the T100A-SCR and T205-SCR models‚ offer reliable power control. This guide details installation‚ programming‚ and troubleshooting for optimal performance.
From mechanical to digital options like the T105-C‚ Greenbrook caters to diverse needs‚ ensuring efficient scheduling for both home and industrial applications.
Greenbrook timers represent a cornerstone of automated time control‚ offering solutions for residential‚ commercial‚ and industrial applications. These devices‚ ranging from simple mechanical models like the T100A-SCR to sophisticated digital units such as the T205-SCR and T105-C Kingshield‚ are designed to streamline electrical operations and enhance energy efficiency.
The core function of a Greenbrook timer is to switch electrical circuits on and off at pre-determined times‚ eliminating the need for manual intervention. This capability is invaluable for controlling lighting‚ heating‚ appliances‚ and various other electrical loads. Understanding the specific features and functionalities of each model is crucial for maximizing their benefits.
Greenbrook’s commitment to quality and reliability has established them as a trusted brand in the electrical control industry. This manual serves as a comprehensive resource‚ guiding users through the installation‚ programming‚ and troubleshooting processes. Whether you’re a homeowner seeking to automate your lighting or an industrial professional managing complex equipment schedules‚ this guide will provide the necessary knowledge to effectively utilize Greenbrook timers.
Furthermore‚ compatibility with modern smart home systems is an evolving aspect of Greenbrook timer technology‚ offering even greater control and convenience.

Greenbrook Timer Models: Overview
Greenbrook offers a diverse portfolio of timers‚ catering to a wide spectrum of electrical control needs. The Greenbrook T100A-SCR is a classic mechanical timer‚ prized for its simplicity and robustness‚ ideal for basic on/off scheduling. In contrast‚ the T205-SCR is a surface-mounted digital timer‚ providing enhanced precision and 7-day programming capabilities‚ often featuring a fused spur switch for added safety.
The T105-C Kingshield White 7 Day Digital Timer represents a further advancement‚ offering a socket box format and up to 24 on/off programs. This model incorporates features like manual override and automatic summer/winter time adjustment‚ enhancing user convenience. Beyond these core models‚ Greenbrook provides a range of fused timers‚ including 13A resistive and 6A inductive variants.
Each model is designed with specific load capacities in mind‚ differentiating between resistive and inductive loads – a critical consideration for optimal performance and safety. Greenbrook timers are commonly used for controlling lighting circuits‚ heating systems‚ and various appliances. Understanding the distinctions between these models allows users to select the most appropriate timer for their specific application‚ ensuring efficient and reliable operation.
T100A-SCR Mechanical Timer: Features and Specifications
The Greenbrook T100A-SCR Mechanical Timer (4883R) is a robust and dependable solution for basic time-controlled switching. This timer operates on a mechanical cam system‚ offering a straightforward and reliable method for scheduling electrical devices. It’s characterized by its simplicity‚ requiring no complex programming or digital interface.
Key Features include a 24-hour dial with clearly defined on/off segments‚ allowing for easy programming of daily schedules. The timer is suitable for controlling a variety of loads‚ though it’s crucial to adhere to its specified current rating. It typically handles resistive loads up to 13A and inductive loads up to 6A‚ ensuring safe and efficient operation.
Specifications generally include a voltage rating of 230V AC and a mounting style suitable for standard switch boxes. The T100A-SCR is often favored in applications where a simple‚ durable timer is required‚ such as controlling lighting or small appliances. Its mechanical nature ensures consistent performance without reliance on electronic components‚ making it a long-lasting and cost-effective choice.
T205-SCR Surface Mounted Digital Timer: Detailed Analysis

The Greenbrook T205-SCR Surface Mounted Digital 7-Day Fused Timer Spur Switch represents a significant step up in functionality compared to mechanical timers. Designed for surface mounting‚ this digital timer offers precise control over electrical devices with a 7-day programming schedule. Its fused spur switch provides an added layer of safety‚ protecting connected equipment from overcurrents.
Key Features include the ability to set multiple on/off programs throughout the week‚ allowing for customized scheduling tailored to specific needs. The digital display provides a clear and intuitive interface for programming and viewing current settings. It supports both manual override and automatic summer/winter time adjustments‚ enhancing its usability.
Specifications typically include a 230V AC voltage rating‚ a 13A resistive/6A inductive load capacity‚ and a robust construction suitable for various environments. The T205-SCR is ideal for applications requiring precise timing and remote control‚ such as controlling heating systems‚ lighting circuits‚ or irrigation systems. Its fused spur design ensures compliance with electrical safety standards.
T105-C Kingshield White 7 Day Digital Timer: Functionality
The Greenbrook T105-C Kingshield White 7 Day Digital Socket Box Timer offers a convenient and efficient solution for automating electrical appliances. This timer‚ designed for socket box installation‚ boasts a sleek white finish that blends seamlessly with most interiors. It allows users to program up to 24 on/off cycles across a 7-day period‚ providing granular control over device operation.
Core Functionality centers around its user-friendly interface and comprehensive programming options. Features include a manual override function for temporary control‚ and automatic adjustment for summer time/daylight saving time‚ eliminating the need for manual rescheduling. The timer supports a 16A load capacity‚ making it suitable for a wide range of household appliances.
The Kingshield design incorporates enhanced safety features‚ ensuring reliable performance and protection against electrical hazards. Its digital display clearly shows the current time and programmed schedule. This timer is perfect for automating lamps‚ fans‚ heaters‚ and other devices‚ promoting energy savings and increased convenience.
Understanding Timer Terminology: Resistive vs. Inductive Loads
When utilizing Greenbrook timers‚ understanding the difference between resistive and inductive loads is crucial for safe and optimal operation. Resistive loads‚ like incandescent light bulbs and heaters‚ offer consistent resistance to electrical current flow. These are generally straightforward for timers to manage‚ with ratings typically expressed in Watts (W).
Inductive loads‚ however‚ present a more complex scenario. These include motors found in appliances like refrigerators‚ washing machines‚ and pumps. Inductive loads require a surge of current when starting‚ which can exceed the timer’s stated resistive rating. Therefore‚ Greenbrook timers specify separate ratings for both resistive and inductive loads – typically expressed in Amps (A).
Exceeding the inductive load rating can damage the timer or the connected appliance. Always check the appliance’s power consumption and select a timer with a sufficient inductive Amp rating. The T205-SCR‚ for example‚ is rated for 13A resistive and 6A inductive. Ignoring these distinctions can lead to malfunction or safety hazards‚ so careful consideration is paramount.
Installation Procedures for Greenbrook Timers
Safety First: Before installing any Greenbrook timer‚ always disconnect the power supply at the circuit breaker or fuse box. Verify the power is off using a voltage tester. Incorrect installation can lead to electric shock or fire hazards.
Wiring: Refer to the wiring diagram specific to your Greenbrook timer model (see section 15). Typically‚ timers have terminals for Line (Hot)‚ Neutral‚ and Load. Ensure wires are securely connected using appropriate connectors and tightened to the correct torque specification. Improper connections can cause overheating and failure.
Mounting: Surface-mounted timers like the T205-SCR are secured with screws to a suitable surface. Socket box timers‚ such as the T105-C‚ fit directly into standard UK socket boxes. Ensure the mounting is stable and the timer is properly aligned.
Testing: After wiring and mounting‚ carefully restore power and test the timer’s functionality. Verify that the timer operates as expected and that the connected appliance receives power according to the programmed schedule. If issues arise‚ immediately disconnect power and re-check the installation.

Programming Greenbrook Digital Timers: Step-by-Step Guide
Initial Setup: Upon powering on a Greenbrook digital timer‚ the display will likely prompt for the current time and date. Use the ‘Hour’‚ ‘Minute’‚ ‘Day’‚ ‘Month’‚ and ‘Year’ buttons to accurately set these parameters. Confirm your entries by pressing the ‘Enter’ or ‘OK’ button.
Program Selection: Most Greenbrook timers offer multiple programs (e.g.‚ Program 1‚ Program 2). Select the desired program using the ‘Program’ button. This allows for different schedules for various applications;
On/Off Times: To set an on/off time‚ navigate to the ‘On’ time setting and input the desired hour and minute. Then‚ move to the ‘Off’ time setting and repeat the process. Repeat these steps for each on/off cycle you wish to program within the selected program.
Day Selection: Specify which days of the week the program should be active. Options typically include ‘Every Day’‚ ‘Weekdays’‚ ‘Weekends’‚ or individual day selection. Save your program by pressing the ‘Enter’ or ‘OK’ button. Review the programmed schedule to ensure accuracy.
Setting On/Off Schedules: A Practical Approach

Define Your Needs: Begin by outlining your desired schedule. For example‚ if you want lights to turn on at sunset and off at sunrise‚ determine approximate times for these events. Consider seasonal variations; adjust schedules accordingly.
Utilize Multiple Programs: Greenbrook timers often support multiple programs. Leverage this feature to create distinct schedules for different days or purposes. A program for weekdays might differ from one for weekends.
Incremental Programming: Start with a simple schedule – perhaps one on/off cycle per day – and gradually add complexity. This approach minimizes errors and simplifies troubleshooting. Test each addition thoroughly.
Leverage Override Functions: Utilize the manual override function for temporary schedule adjustments. This is useful for unexpected events or changes in routine. Remember to revert to the programmed schedule when appropriate.
Review and Refine: Regularly review your schedules to ensure they align with your needs. Adjust timings as necessary to optimize energy savings and convenience. Consistent monitoring is key to efficient operation.
Manual Override Function: Usage and Benefits
Temporary Control: The manual override function on Greenbrook timers allows for temporary deviation from the programmed schedule without permanently altering it. This is ideal for situations requiring immediate control‚ such as unexpected late nights or early mornings.
Simple Activation: Typically‚ a dedicated button or switch activates the override. The timer will then operate in a continuous on or off state‚ depending on its current setting‚ until manually deactivated or the next scheduled event.
Convenience and Flexibility: This feature provides convenience and flexibility‚ eliminating the need to reprogram the timer for short-term changes. It’s particularly useful for lighting control‚ ensuring illumination when needed regardless of the schedule.
Energy Savings: While offering convenience‚ responsible use of the override function prevents unnecessary energy consumption. Remember to revert to the programmed schedule promptly to maintain efficiency.
Clear Indication: Most Greenbrook timers provide a visual indicator – often an LED – to confirm when the override function is active‚ preventing confusion and ensuring awareness of the current operating mode.
Summer Time/Daylight Saving Time Adjustment
Automatic vs; Manual Adjustment: Greenbrook digital timers often feature options for automatic or manual Daylight Saving Time (DST) adjustment. Automatic adjustment‚ where available‚ utilizes pre-programmed rules to shift the clock forward one hour in spring and back in autumn.
Manual Adjustment Procedure: For timers lacking automatic DST‚ manual adjustment is necessary. This typically involves accessing the timer’s settings menu and incrementing or decrementing the time by one hour. Consult your specific model’s manual for precise instructions.
Maintaining Schedule Accuracy: Accurate DST adjustment is crucial for maintaining the accuracy of your programmed on/off schedules. Failure to adjust can result in devices operating at incorrect times‚ impacting convenience and energy savings.
Reviewing Local Regulations: DST rules vary by region. Always verify the current DST schedule for your location to ensure correct timer settings. Incorrect settings can disrupt automated control.
Testing After Adjustment: After making DST adjustments‚ verify the timer’s operation to confirm that scheduled events occur at the intended times. This simple check ensures proper functionality.
Troubleshooting Common Issues: Timer Not Working
Power Supply Verification: The most common issue is a lack of power. Ensure the timer is correctly connected to a functioning power source. Check the circuit breaker or fuse associated with the timer’s outlet.

Battery Check (Digital Timers): Digital timers rely on batteries for backup and operation. Replace the batteries with fresh ones‚ even if the display appears dim. Low batteries can cause erratic behavior or complete failure.
Program Verification: Confirm that the timer is programmed with valid on/off schedules. Incorrect or missing programs will prevent operation. Review and reprogram as needed‚ consulting the manual.
Manual Override Status: Check if the manual override function is engaged. This disables the programmed schedule. Disengage the override to restore automated control.
Load Compatibility: Verify that the connected load (e.g.‚ lamp‚ appliance) is within the timer’s specified capacity (resistive vs. inductive). Overloading can damage the timer or prevent operation.
Reset Procedure: As a last resort‚ attempt a reset of the timer. Refer to the manual for the specific reset procedure for your model. This can often resolve software glitches.
Battery Backup and Power Failure Operation
Battery Backup Functionality: Greenbrook digital timers incorporate battery backup systems to maintain programmed settings during brief power outages. This ensures minimal disruption to scheduled operations‚ preserving your customized timing preferences.
Operational Continuity: During a power failure‚ the timer will continue to operate using battery power‚ albeit for a limited duration. The length of backup depends on battery condition and the timer model‚ typically lasting up to 100 hours.
Program Retention: The primary function of the battery backup is to retain the programmed on/off schedules. This prevents the need for reprogramming after a power restoration‚ saving time and effort.
Power Restoration Behavior: Upon power restoration‚ the timer automatically reverts to its programmed schedule‚ continuing operation seamlessly. No manual intervention is usually required.
Battery Replacement: Regularly check and replace the batteries (typically AA or AAA) to ensure reliable backup functionality. Low batteries compromise the timer’s ability to maintain settings during outages.
Important Note: Battery backup does not provide continuous power to the connected load during an outage. It solely preserves the timer’s programming.
Safety Precautions When Using Greenbrook Timers
Electrical Safety First: Always disconnect the main power supply before installing or wiring any Greenbrook timer. Working with electricity can be dangerous‚ and precautions are paramount.
Qualified Personnel: Installation should ideally be performed by a qualified electrician‚ ensuring compliance with local electrical codes and regulations. Improper wiring can create hazards.
Load Capacity: Never exceed the timer’s specified load capacity (e.g.‚ 13A resistive‚ 6A inductive). Overloading can damage the timer and pose a fire risk.
Indoor Use Only: Greenbrook timers are generally designed for indoor use. Avoid exposure to moisture‚ direct sunlight‚ and extreme temperatures.
Wiring Integrity: Ensure all wiring connections are secure and properly insulated. Loose connections can cause short circuits or electrical shocks.
Regular Inspection: Periodically inspect the timer for any signs of damage‚ such as cracked casing or frayed wires. Replace damaged units immediately.
Caution with Inductive Loads: When controlling inductive loads (motors‚ transformers)‚ use appropriate surge suppression to protect the timer from voltage spikes.
Do Not Disassemble: Avoid disassembling the timer‚ as this can compromise its safety features and void any warranty.
Wiring Diagrams and Electrical Connections
Standard Wiring: Greenbrook timers typically feature three terminals: Common (C)‚ Live (L)‚ and Switched Live (SL). The Live wire from the mains supply connects to ‘L’‚ the Common wire to ‘C’‚ and the Switched Live to the device being controlled.
Fused Spur Connections: For models like the T205-SCR‚ wiring involves connecting to a fused spur unit. Ensure the fuse rating matches the appliance’s requirements.
Neutral Wire: The neutral wire is connected directly to the appliance‚ bypassing the timer. The timer only controls the live circuit.
Earth Connection: Always connect the earth wire (green/yellow) to the earth terminal in the wiring box for safety. This provides a path for fault currents.

Inductive Load Considerations: When wiring inductive loads‚ a suppressor may be required to prevent damage to the timer contacts. Consult the timer’s specifications.
Diagram Reference: Refer to the wiring diagram printed on the timer itself or in the accompanying manual for specific connection details.
Color Coding: Adhere to standard wiring color codes (Brown – Live‚ Blue – Neutral‚ Green/Yellow – Earth) for consistent and safe installations.
Secure Connections: Ensure all wire connections are tight and secure to prevent loose wires and potential hazards.
Greenbrook Timer Applications: Home and Industrial Use

Residential Applications: Greenbrook timers are ideal for automating home lighting‚ controlling garden irrigation systems‚ and managing aquarium equipment. They enhance security by simulating occupancy when away.
Heating & Cooling Control: Timers can regulate electric heaters‚ fan heaters‚ and air conditioning units‚ optimizing energy consumption and comfort levels.
Industrial Settings: In industrial environments‚ Greenbrook timers manage machinery‚ lighting in warehouses‚ and ventilation systems‚ improving operational efficiency.
Agricultural Use: Timers automate greenhouse lighting‚ hydroponic systems‚ and livestock feeding equipment‚ streamlining agricultural processes.

Commercial Buildings: They control signage‚ display lighting‚ and security systems in shops‚ offices‚ and other commercial spaces.
Specific Models: The T100A-SCR suits basic on/off control‚ while digital models like the T205-SCR offer advanced scheduling for complex applications.
Energy Savings: By precisely controlling electrical devices‚ Greenbrook timers contribute to significant energy savings and reduced electricity bills.
Increased Convenience: Automated scheduling provides convenience and eliminates the need for manual operation of appliances and equipment.
Replacing a Greenbrook Timer: A DIY Guide
Safety First: Before starting‚ always disconnect the power supply at the consumer unit. Verify the circuit is dead using a suitable voltage tester. This is paramount for safety.
Remove Old Timer: Carefully remove the old timer from its mounting. Note the wiring configuration – photograph it if necessary – to ensure correct reconnection.
Disconnect Wiring: Disconnect the wires from the old timer‚ labeling each one if unsure. Typically‚ you’ll have live‚ neutral‚ and switched live wires.
Install New Timer: Mount the new Greenbrook timer in the same location. Ensure it’s securely fixed to the wall or socket box.
Reconnect Wiring: Reconnect the wires to the corresponding terminals on the new timer‚ referencing your notes or photograph. Double-check all connections.
Secure Connections: Ensure all screw terminals are tightened securely to prevent loose connections and potential hazards.
Restore Power: Carefully restore the power supply at the consumer unit. Test the timer’s functionality to confirm correct operation.
Final Checks: Verify the timer is programming correctly and controlling the connected appliance as expected.
Greenbrook Timer Compatibility with Smart Home Systems
While many Greenbrook timers‚ particularly the mechanical models like the T100A-SCR‚ operate as standalone devices‚ integration with modern smart home ecosystems is evolving.
Currently‚ direct integration with platforms like Amazon Alexa‚ Google Assistant‚ or Apple HomeKit is limited for most Greenbrook timers. However‚ smart plugs offer a workaround.
By connecting a Greenbrook timer to a smart plug‚ you can indirectly control the timer’s output via voice commands or smartphone apps. The smart plug acts as a bridge.
Digital models‚ such as the T205-SCR and T105-C‚ may offer greater potential for future smart home compatibility through firmware updates or third-party integrations.
Exploring IFTTT (If This Then That) recipes could also unlock basic automation possibilities‚ linking timer events to other smart home devices.
Consider the 16A capacity of the T105-C when selecting a compatible smart plug‚ ensuring it can handle the connected load safely.
Future Greenbrook timer releases may feature native smart home integration‚ responding to growing consumer demand for connected devices.
Where to Find Greenbrook Timer Manuals and Support
Accessing Greenbrook timer manuals and support resources is crucial for successful installation‚ programming‚ and troubleshooting. Several avenues are available to users.
The official Greenbrook website is the primary source for downloadable PDF manuals for all current and many discontinued models‚ including the T100A-SCR‚ T205-SCR‚ and T105-C.
Retailers like Screwfix‚ where Greenbrook timers are commonly sold‚ often host digital copies of manuals on their product pages. Searching by model number is key.
YouTube provides a wealth of user-generated videos demonstrating timer setup‚ programming‚ and common fixes. These can be invaluable visual aids.
For direct support‚ contacting Greenbrook’s customer service department via phone or email is recommended for complex issues or warranty claims.
Online electrical forums and communities can offer peer-to-peer assistance and troubleshooting advice from experienced users.
Always retain a copy of your timer’s manual for future reference‚ especially regarding safety precautions and wiring diagrams.
Ensure you have the correct model number when seeking support to receive accurate and relevant assistance.
Greenbrook Timer Alternatives and Comparisons
When considering Greenbrook timers‚ it’s beneficial to explore alternative brands and compare features to ensure the best fit for your needs. Several reputable manufacturers offer similar products.
Timeguard is a prominent competitor‚ known for its robust digital timers and extensive range of programmable options‚ often at competitive price points. Their models frequently feature similar functionalities to Greenbrook’s T205-SCR.
Lap provides a diverse selection of mechanical and digital timers‚ catering to both domestic and commercial applications. They are often praised for their user-friendly interfaces.

Energenie‚ a brand focused on smart home integration‚ offers Wi-Fi enabled timers that can be controlled remotely via smartphone apps‚ a feature absent in many Greenbrook models.
Compared to these alternatives‚ Greenbrook timers generally offer a balance of affordability and reliability‚ particularly their mechanical options like the T100A-SCR.
However‚ Greenbrook’s digital timers may lack some of the advanced features found in Timeguard or Energenie’s offerings‚ such as detailed energy monitoring or IFTTT compatibility.
Ultimately‚ the best choice depends on your specific requirements‚ budget‚ and desired level of automation.