Orbit 27894 Instruction Manual: Overview
Welcome! This comprehensive guide details the Orbit 27894 timer, offering setup, programming, and troubleshooting assistance. Find your specific model’s manual online for detailed instructions.
Orbit provides warranties and customer support; explore manuals for 57894, 27894, and related models. Enjoy effortless sprinkler control!
Congratulations on choosing the Orbit 27894 timer! This innovative device simplifies your lawn and garden irrigation, offering convenient and efficient control over your watering schedules. Designed for ease of use, the Orbit 27894 allows you to customize watering durations, start times, and frequencies to meet the specific needs of your landscape.
This timer is compatible with various valve types and is suitable for residential use. Whether you’re a seasoned gardener or new to automated irrigation, the Orbit 27894 provides a user-friendly experience. Explore the included manual or online resources for detailed instructions tailored to your model – including related versions like 57894 and 91894.
Key features include manual watering options, a rain delay function, and seasonal adjustment capabilities. Proper installation and programming, as outlined in this guide, will ensure optimal performance and water conservation. Refer to the Orbit warranty information for product coverage details.
What’s Included in the Box

Upon opening your Orbit 27894 package, please verify that all components are present. The standard contents include the Orbit timer unit itself, designed for outdoor use and compatibility with models like 57894 and 27896. You should also find a detailed user manual providing step-by-step instructions for installation and programming.
Additionally, the box contains mounting screws and hardware necessary to securely attach the timer to a wall or other suitable surface. Depending on the specific package, you may also receive wire connectors for simplified valve wiring. Please note that the power adapter may be included or sold separately, depending on the model variation.
If any items are missing or damaged, immediately contact Orbit customer support for assistance. Retain the original packaging for potential returns or warranty claims. Refer to the manual for a complete parts list and diagrams.

Installation Guide
Proper installation is crucial for optimal performance. Securely mount the Orbit 27894, wire the valves correctly, and connect to a reliable power source, following manual instructions.
Mounting the Timer
Selecting a Location: Choose a sheltered location for your Orbit 27894 timer, protected from direct sunlight, rain, and extreme temperatures. A garage, shed, or covered outdoor area is ideal. Ensure the location is within reach of a power outlet and close enough to the valves you intend to control;
Mounting Procedure: Utilize the provided mounting screws and anchors to securely attach the timer to a solid surface. Avoid mounting on unstable structures. Pre-drilling pilot holes is recommended, especially when mounting on concrete or brick. Ensure the timer is level to prevent internal component issues.
Wiring Considerations: Before mounting, plan the routing of the valve wires to ensure sufficient slack and prevent strain on the connections. Keep wires away from potential hazards like lawnmowers or sharp objects. Refer to the manual for specific mounting diagrams and safety precautions.
Important Note: Improper mounting can void the warranty and affect timer functionality.
Wiring the Valve(s)
Valve Compatibility: The Orbit 27894 timer is compatible with standard 24VAC sprinkler valves. Ensure your valves meet this requirement before proceeding. Incorrect voltage can damage the timer and valves.
Wiring Connections: Refer to the wiring diagram in your manual. Typically, each valve connects to a numbered zone terminal on the timer. Connect the common wire from each valve to the “Common” terminal. Securely tighten all wire connectors to prevent loose connections and ensure reliable operation.
Wire Gauge: Use appropriately sized wiring (typically 18-22 gauge) for the distance between the timer and the valves. Longer distances may require thicker gauge wire to minimize voltage drop.
Safety First: Always disconnect power to the timer before making any wiring connections. Double-check all connections before restoring power to avoid short circuits.
Troubleshooting: If valves don’t activate, verify wiring and valve functionality.
Connecting to a Power Source
Power Requirements: The Orbit 27894 timer requires a standard 120VAC, 60Hz power source. Ensure your outlet meets these specifications. Using an incorrect power source can damage the timer.
Plug-In Adapter: Most Orbit timers, including the 27894, utilize a plug-in adapter. Simply plug the adapter into a grounded electrical outlet. Avoid using extension cords if possible; if necessary, use a heavy-duty outdoor-rated extension cord.
Weatherproof Outlet: For outdoor installations, it’s highly recommended to use a weatherproof outlet or enclosure to protect the power connection from the elements. This prevents electrical hazards and ensures reliable operation.
Safety Precautions: Never handle the power adapter with wet hands. Ensure the outlet is dry before plugging in the timer. If the adapter is damaged, do not use it and contact customer support.
Initial Power-Up: After connecting, the timer should power on automatically.

Programming the Orbit 27894
Effortless control awaits! Easily set watering schedules using the intuitive control panel. Customize start times, durations, and days for optimal irrigation.
Quickly program your Orbit timer and enjoy a lush, healthy landscape.
Understanding the Control Panel
The Orbit 27894’s control panel is designed for user-friendly programming. Familiarize yourself with the buttons and display to navigate settings efficiently. Typically, you’ll find buttons for ‘Set’, ‘Menu’, ‘Start/Stop’, and directional arrows for scrolling through options.
The LCD display clearly shows the current time, date, and programmed schedule. Use the ‘Menu’ button to access various settings, including program selection, watering duration, and start times. The ‘Set’ button confirms your selections, while the arrows adjust values.
Pay attention to icons indicating active programs, rain delay status, and manual mode. Refer to your specific model’s manual for a detailed diagram of the control panel and button functions. Understanding these elements ensures seamless programming and control over your irrigation system. Explore the Orbit website for additional resources and support.
Setting the Current Time and Date
Accurate time and date settings are crucial for proper schedule operation. Begin by pressing the ‘Menu’ button until you reach the ‘Time/Date’ setting. Use the directional arrows to adjust the hour, ensuring you select AM or PM correctly. Confirm each setting with the ‘Set’ button.
Next, set the date using the same method – navigate through month, day, and year using the arrows and confirm with ‘Set’; Some models may require you to enter the year last. Double-check the displayed time and date for accuracy; incorrect settings will affect your watering schedule.
Refer to your Orbit 27894 manual for specific instructions, as button layouts can vary slightly between models. Proper time and date configuration ensures your timer operates as intended, delivering water precisely when needed.
Creating a Watering Schedule ౼ Start Time
Setting the start time is the first step in programming your watering schedule. Access the ‘Schedule’ menu using the ‘Menu’ button, then select ‘Start Time’. Utilize the up and down arrow buttons to adjust the hour, ensuring correct AM or PM selection. Confirm your choice with the ‘Set’ button.
Consider your local water restrictions and plant needs when choosing a start time. Early morning watering minimizes evaporation and fungal diseases. Avoid watering during peak sunlight hours. You can typically set multiple start times for different zones or watering durations.
Refer to your Orbit 27894 manual for detailed guidance, as the interface may vary. Accurate start time programming is vital for efficient water usage and healthy landscaping.
Creating a Watering Schedule ౼ Duration
Adjusting the watering duration determines how long each zone will be irrigated. Within the ‘Schedule’ menu, select ‘Duration’. Use the up and down arrow buttons to set the watering time, typically measured in minutes. Consider plant type and soil conditions when determining appropriate duration.

Different zones may require varying durations. For example, lawns generally need more water than flowerbeds. Observe your landscape to identify areas needing adjustment. Avoid overwatering, which can lead to runoff and plant damage.
Consult your Orbit 27894 manual for specific instructions on duration settings. Remember that shorter, more frequent watering cycles are often more effective than infrequent, long durations. Accurate duration programming optimizes water conservation and plant health.
Creating a Watering Schedule ⎼ Days of the Week

Selecting watering days is crucial for efficient water management. Within the ‘Schedule’ menu, navigate to ‘Days’. The Orbit 27894 allows for customized watering schedules, enabling you to choose specific days or day groups for irrigation.
Options typically include individual days (Sunday, Monday, etc.), odd/even days, or specific groupings. Consider local watering restrictions and weather patterns when selecting days. Avoid watering during peak evaporation times, like midday.
Review your local guidelines to ensure compliance with water conservation regulations. The Orbit timer’s flexibility allows for adapting to changing conditions. Refer to your manual for detailed instructions on setting day preferences. Proper day selection maximizes water savings and promotes healthy plant growth.

Advanced Features
Unlock enhanced control with Orbit 27894’s manual watering, rain delay, and seasonal adjustment options. These features optimize watering based on conditions!
Explore these capabilities for efficient, customized irrigation.
Manual Watering Mode
Initiate immediate watering bypassing scheduled programs with the Orbit 27894’s Manual Watering Mode. This is exceptionally useful for spot-watering gardens, testing zones, or addressing unforeseen dryness. Access this function directly through the control panel – typically a dedicated “Manual” button or within the program override settings.
To activate, simply select the zone you wish to water and specify the desired duration. The timer will operate that zone for the set time, then revert to its programmed schedule. This mode doesn’t alter your existing programs; it’s a temporary override.
Refer to your specific model’s manual for precise button locations and navigation. Videos demonstrate this process, showing how to run the timer manually without altering schedules. Remember to deactivate Manual Mode after use to resume automated operation!
Rain Delay Function
Conserve water and prevent overwatering with the Orbit 27894’s Rain Delay feature. This temporarily suspends your programmed watering schedule for a specified duration, accounting for natural rainfall. Access the Rain Delay setting through the control panel’s menu – often found within the advanced settings.
To activate, input the number of days you wish to pause watering. The timer will automatically resume its schedule after the set period. This prevents unnecessary irrigation during and after rainfall, promoting water efficiency.
Consult your model’s manual for specific instructions, as button layouts vary. The Rain Delay function is a valuable tool for responsible water management. Remember to cancel the delay manually if conditions change and watering is needed sooner!
Seasonal Adjustment
Optimize watering based on changing weather patterns with the Orbit 27894’s Seasonal Adjustment feature. This allows you to globally increase or decrease watering durations across all programmed zones, adapting to varying evaporation rates throughout the year.
During hotter months, increase the percentage to deliver more water, compensating for increased evaporation. Conversely, reduce the percentage during cooler, wetter seasons to prevent overwatering. This ensures your landscape receives the appropriate amount of hydration, regardless of the time of year.
Access this function through the control panel’s settings menu. Adjustments are typically expressed as a percentage – for example, +10% for increased watering or -20% for reduced watering. Refer to your specific model’s manual for detailed instructions and optimal settings for your region.

Troubleshooting
Encountering issues? This section provides solutions for common problems like power failures, valve malfunctions, and display errors with your Orbit 27894 timer.
Consult the manual for detailed diagnostics and ensure proper wiring for optimal performance.
Timer Not Powering On
If your Orbit 27894 timer fails to power on, begin by verifying the power source connection. Ensure the transformer is securely plugged into a working electrical outlet and that the wiring to the timer is correct and intact. Check the fuse within the transformer; a blown fuse will prevent power delivery.
Next, inspect the wiring connections at the timer itself. Loose or corroded wires can interrupt the power supply. Confirm the voltage output of the transformer matches the timer’s requirements, as specified in the user manual. If using a battery backup, ensure the batteries are fresh and correctly installed.
Additionally, some models feature a power switch; confirm it’s in the ‘on’ position. If the problem persists after these checks, consult the full Orbit 27894 manual or contact customer support for further assistance, potentially indicating an internal timer fault.
Valve Not Activating
If your sprinkler valve isn’t activating with the Orbit 27894 timer, first confirm the programmed schedule is active and the start time has passed. Verify the valve is receiving power by testing the solenoid wire with a multimeter – a reading indicates power is reaching the valve.
Next, inspect the valve itself for any physical obstructions or damage. Ensure the valve is properly connected to the timer’s zone output terminals. Check for broken or corroded wires in the valve’s wiring. A faulty solenoid within the valve is a common cause; consider replacing it.
Also, confirm there are no manual shut-off valves blocking water flow to the zone; If issues persist, consult the Orbit manual for specific troubleshooting steps or contact customer support, as a timer zone output malfunction may be present.
Display Issues
Experiencing display problems with your Orbit 27894 timer? A blank screen often indicates a power supply issue. Double-check the transformer connection and ensure it’s delivering the correct voltage. Try a different outlet to rule out electrical problems.
If the display is dim or flickering, the LCD contrast might need adjustment. Refer to your specific model’s manual for instructions on contrast settings. For distorted characters or a partially visible screen, a low battery (if applicable) could be the culprit – replace it immediately.
Should the display remain unresponsive, attempt a reset by briefly disconnecting the power source. If problems continue, consult the Orbit website for downloadable manuals or contact customer support for further assistance, potentially indicating a hardware malfunction.

Maintenance and Care
Regular cleaning and winterization are vital for longevity. Protect your Orbit 27894 from extreme temperatures and debris, ensuring optimal performance each season!
Cleaning the Timer
Maintaining a clean timer is crucial for reliable operation of your Orbit 27894 system. Dust, dirt, and debris can accumulate, potentially interfering with button functionality and the display screen. To clean, always disconnect the power source before beginning.
Use a soft, damp cloth to gently wipe down the exterior housing of the timer. Avoid harsh chemicals, abrasive cleaners, or excessive water, as these can damage the unit. For stubborn dirt, lightly dampen the cloth with a mild soap solution, ensuring no liquid enters the internal components.
Pay particular attention to the control panel and display area, carefully removing any accumulated grime. After cleaning, thoroughly dry the timer with a clean, dry cloth before reconnecting the power. Regular cleaning, performed as needed, will help ensure the longevity and optimal performance of your Orbit timer.
Winterizing the System
Protecting your Orbit 27894 and irrigation system during freezing temperatures is essential to prevent damage. Before the first frost, disconnect the timer from the power source. Thoroughly drain all water from the valves and pipes connected to the timer. Compressed air can be used to blow out any remaining water, ensuring complete removal.
Remove the timer from its mounting location and store it indoors in a dry, protected area. This prevents moisture buildup and potential electrical issues. Do not disassemble the timer for winter storage; leave it intact.
If your valves are not self-draining, manually open them to allow water to escape. Consider insulating exposed pipes and backflow preventers for added protection. Upon returning warmer weather, reinstall the timer and re-establish your watering schedule, verifying all connections are secure before restoring power.

Warranty Information
Orbit Irrigation Products provides warranties for its timers, including the 27894. Details vary by model; review your manual for specific coverage and claim procedures.
Contact customer support for assistance!
Orbit Irrigation Products Warranty Details
Orbit Irrigation Products, Inc. warrants its products to be free from defects in materials and workmanship for a specified period. The duration of the warranty varies depending on the specific product model, including the Orbit 27894 timer. Generally, this warranty covers defects arising from normal use and does not encompass issues resulting from misuse, abuse, accidental damage, or unauthorized modifications.
To make a warranty claim, customers must provide proof of purchase, such as a receipt or invoice, and a detailed description of the defect. Orbit may require the return of the defective product for inspection. The warranty typically covers repair or replacement of the defective product, at Orbit’s discretion. This warranty is non-transferable and applies only to the original purchaser.
Please consult your product’s specific manual or the Orbit website for the most accurate and up-to-date warranty information. Warranty terms are subject to change without notice.
Contacting Customer Support
Orbit Irrigation Products offers multiple channels for customer support regarding the Orbit 27894 timer and other products. For immediate assistance, visit the Orbit website’s support section, where you can find frequently asked questions (FAQs), troubleshooting guides, and downloadable manuals for models like the 57894 and 27896.
You can also reach Orbit customer support via phone during business hours. Their representatives are equipped to address technical issues, warranty claims, and general inquiries. Email support is another option, allowing you to submit detailed questions and receive a response within a reasonable timeframe. When contacting support, have your product model number and proof of purchase readily available.
Orbit aims to provide excellent customer service and resolve issues efficiently. Explore their online resources or connect with a support representative for personalized assistance.

