Congratulations on choosing your new Orbit timer! This manual guides you through installation, programming, and features for efficient watering solutions.
Overview of the Orbit 27894 Timer
The Orbit 27894 timer is designed for convenient and flexible automated irrigation control. Utilizing Orbit’s exclusive Easy-Set Logic, this timer simplifies programming and setup, making it user-friendly for both novice and experienced users. It allows for customized watering schedules tailored to specific landscape needs, promoting water conservation and healthy plant growth.
This timer is compatible with various Orbit models (27896, 27892, 27999, 91894, 91896, 91892, 91899) and offers features like rain delay and manual override for added control. It’s an ideal solution for residential sprinkler systems, ensuring efficient and reliable operation.
Key Features and Benefits
The Orbit 27894 boasts Easy-Set Logic, simplifying programming for customized watering schedules. Key benefits include water conservation through precise control, promoting healthy landscapes and reducing water waste. The timer features a Rain Delay function, pausing schedules during rainfall, and a Manual Override for instant watering.
Its compatibility with multiple Orbit models enhances versatility. Enjoy effortless operation, reliable performance, and a user-friendly interface. This timer provides peace of mind, ensuring your irrigation system operates efficiently and effectively, saving you time and money.

Installation Guide
Proper installation ensures optimal performance. This section details selecting a location, mounting the timer securely, and correctly connecting valve wiring and the power source.
Selecting a Suitable Location
Choosing the right location is crucial for your Orbit 27894 timer’s longevity and functionality. Select a spot near a grounded electrical outlet, protected from direct rain and excessive sunlight. Ensure the location allows easy access for programming and manual overrides. Avoid areas prone to flooding or standing water, as this can damage the timer’s internal components.
The timer should be mounted within the specified operating temperature range to prevent malfunctions. Consider proximity to the valves you intend to control, minimizing the length of wiring needed for a clean installation. A sheltered location will also help protect the timer from accidental damage.
Mounting the Timer
Before mounting, ensure you’ve selected a suitable location as previously described. The Orbit 27894 timer typically includes a mounting plate with pre-drilled holes. Use appropriate screws (not always included) suitable for the mounting surface – wood, vinyl siding, or concrete.
Securely attach the mounting plate to the surface, ensuring it’s level for proper timer alignment. Carefully align the timer with the mounting plate and snap it into place. Verify the timer is firmly attached and doesn’t wobble. Protect wiring from damage during the mounting process, and ensure easy access for future maintenance.
Connecting Valve Wiring
Before connecting, ensure the power source is disconnected! Locate the valve terminals on the timer – typically labeled as “Valve,” “Common,” or with numbered designations. Refer to your valve’s wiring diagram for correct connections. Usually, a common wire connects to the “Common” terminal, and individual valve wires connect to numbered terminals.
Use wire connectors (not always included) to securely join the wires, avoiding exposed copper. Double-check all connections for tightness and proper polarity. Incorrect wiring can damage the timer or valves. Ensure wires are neatly arranged and protected from the elements to prevent corrosion and ensure reliable operation.
Connecting the Power Source
The Orbit 27894 timer typically operates on standard household current. Locate the designated power input on the timer, often a low-voltage transformer. Carefully connect the provided power adapter to the timer and then plug it into a grounded electrical outlet. Ensure the outlet is protected by a circuit breaker or fuse.
Avoid using extension cords if possible; if necessary, use a heavy-duty outdoor-rated extension cord. Verify the voltage compatibility before plugging in. Improper power connection can damage the timer. Always inspect the power adapter for any signs of damage before use, and never operate with a damaged adapter.

Programming the Timer
Orbit’s Easy-Set Logic simplifies programming watering schedules. Easily set the current time, date, start times, duration, and desired watering days for optimal results.
Understanding Easy-Set Logic
Orbit’s exclusive Easy-Set Logic is designed for intuitive and straightforward programming of your sprinkler timer. This user-friendly system eliminates complex coding and allows for quick adjustments to your watering schedules. The logic centers around a simple, rotary dial interface, enabling you to easily navigate through various settings like time, date, and watering duration.
Instead of memorizing complicated button combinations, Easy-Set Logic provides a visual and tactile experience. You simply rotate the dial to the desired setting and press the “Select” or “Enter” button to confirm. This minimizes frustration and ensures accurate programming, even for first-time users. It’s a core feature making Orbit timers exceptionally accessible.
Setting the Current Time and Date
Accurate time and date settings are crucial for proper timer operation. Begin by locating the “Time/Date” setting on the control panel, typically accessed via the rotary dial. Use the dial to navigate to the “Hour” setting and adjust it to the correct time. Repeat this process for “Minutes,” “Month,” “Day,” and “Year.”
Confirm each selection by pressing the “Select” or “Enter” button. Some models may offer a 24-hour or AM/PM format option; choose your preference. Ensuring the correct time and date allows the timer to execute watering schedules precisely as programmed, maximizing water conservation and plant health. Double-check your settings for accuracy.
Programming Watering Schedules
Orbit’s Easy-Set Logic simplifies schedule creation. Access the “Program” menu using the control dial. You’ll define individual programs, each with unique start times, durations, and watering days. Begin by selecting a program number (1-3 are common). Next, navigate to “Start Time” to set when the watering cycle begins.
Then, adjust “Watering Duration” to specify how long each zone will water, measured in minutes. Finally, choose “Watering Days” to select which days of the week the program will run. Save each program individually, and review your settings to ensure they align with your landscaping needs.

Setting Start Times
To establish watering start times, enter the “Start Time” menu within the program settings. Utilize the control dial to navigate through hours and minutes. Consider your local water pressure and plant needs when selecting appropriate times. Multiple start times per program are often supported, allowing for segmented watering cycles.
Early morning watering minimizes evaporation, promoting healthier plant growth. Avoid watering during peak sunlight hours. Confirm the AM/PM setting is correct. Save each start time individually. Review all programmed start times to prevent overlapping schedules or missed watering opportunities, ensuring efficient water usage.
Adjusting Watering Duration
Watering duration is crucial for plant health and water conservation. Access the “Duration” setting within each program. Use the control dial to specify watering times, ranging from minutes to hours, depending on your irrigation system’s flow rate and plant requirements. Shorter durations are suitable for lawns, while longer durations benefit deeply rooted plants.
Observe your landscape to determine optimal watering times. Avoid overwatering, which can lead to root rot and fungal diseases. Adjust durations seasonally, reducing watering during cooler months. Regularly inspect your plants for signs of under or overwatering, and modify the duration accordingly for optimal results.
Selecting Watering Days
To customize your watering schedule, access the “Days” setting within each program. The Orbit 27894 allows flexible day selection – choose individual days, sequential days, or interval options (e.g., every other day). Consider local watering restrictions and plant needs when selecting days.
Avoid watering during peak evaporation times, like midday. Early morning watering is generally most efficient. Observe your landscape to determine the best watering frequency. Adjust days seasonally, reducing watering during rainy periods. Regularly review and modify your day selections to optimize water usage and plant health.

Advanced Features
Explore enhanced control with Rain Delay, Manual Override, and Seasonal Adjustment features, optimizing your watering schedule for efficiency and conservation.
Rain Delay Function
The Rain Delay function temporarily suspends your programmed watering schedule, preventing overwatering during periods of rainfall. This feature is crucial for water conservation and maintaining a healthy landscape. You can typically activate Rain Delay by accessing the timer’s settings and specifying the desired delay duration, often ranging from hours to days.
The Orbit 27894 allows you to bypass scheduled watering, ensuring your garden isn’t unnecessarily saturated; Remember to deactivate the Rain Delay once the weather clears to resume normal operation. This intelligent feature adapts to real-time conditions, saving water and promoting responsible irrigation practices.
Manual Override Mode
Manual Override Mode provides immediate control over your watering system, bypassing the programmed schedule. This is useful for addressing specific plant needs or responding to unexpected dry spells. Typically, activating this mode involves pressing a dedicated “Override” button on the timer’s control panel.
The Orbit 27894’s override function allows you to initiate watering instantly, regardless of the set schedule. You can usually specify the duration of the manual watering session. Remember to deactivate the override to return to the automated program. This feature offers flexibility and ensures your landscape receives the necessary hydration when needed.
Seasonal Adjustment
Seasonal Adjustment allows you to fine-tune your watering schedule based on changing weather patterns throughout the year. As temperatures rise or fall, plant water requirements shift, and this feature compensates for those changes. Typically, it’s expressed as a percentage increase or decrease in watering duration.
The Orbit 27894’s seasonal adjustment lets you globally adjust all programmed schedules, avoiding the need to modify each start time individually. A positive percentage increases watering time, ideal for hot summers, while a negative percentage reduces it for cooler seasons. This ensures efficient water usage and healthy plant growth.

Troubleshooting
Encountering issues? This section provides solutions for common problems, including valve connectivity, programming errors, and display malfunctions for your Orbit 27894.
Common Issues and Solutions
Timer Not Displaying Correct Time: Ensure the correct date and time are programmed. Check battery levels, as low power can cause inaccuracies. Resetting the timer to factory defaults and re-programming can resolve this.
Valves Not Activating: Verify proper valve wiring connections. Confirm the program is active and start times are correctly set. Inspect the solenoid valve for any physical damage or obstructions. A faulty valve may require replacement.
Rain Delay Not Working: Double-check the rain delay duration is set appropriately. Ensure the manual override isn’t active, preventing scheduled programs from resuming. Confirm the sensor (if connected) is functioning correctly.
Program Not Running: Confirm the program is enabled and the current date falls within the programmed schedule. Check for any conflicting programs or overrides.
Resetting the Timer
To reset your Orbit 27894 timer, locate the reset button – often a small recessed button requiring a pin or similar tool. Press and hold this button for approximately five to ten seconds. The display should clear and revert to the factory default settings.
Caution: Resetting will erase all programmed schedules, watering durations, and customized settings. You will need to re-enter the current time, date, and completely reprogram your desired watering schedules after a reset. This is useful for troubleshooting persistent issues or preparing the timer for a new location.

Maintenance and Care
Regular cleaning and battery checks ensure optimal performance. Keep the timer casing free from debris and replace batteries annually for reliable operation.
Cleaning the Timer
To maintain your Orbit 27894 timer’s longevity, periodic cleaning is recommended. Begin by disconnecting the power source to prevent electrical shock. Use a damp, soft cloth to gently wipe the exterior casing, removing any accumulated dirt or debris. Avoid abrasive cleaners or solvents, as these can damage the plastic components.
For stubborn grime, a mild soap solution can be used, ensuring the cloth is only slightly moistened. Never submerge the timer in water or allow water to enter the battery compartment. After cleaning, thoroughly dry the timer with a clean cloth before reconnecting the power. Regular cleaning helps ensure accurate operation and extends the timer’s lifespan.
Battery Replacement
To ensure continuous operation of your Orbit 27894 timer, replace the batteries when the low battery indicator appears. Open the battery compartment, typically located on the timer’s face or back, using a screwdriver if necessary. Remove the old batteries, noting their correct polarity (+ and -).
Insert fresh alkaline batteries of the correct size, matching the polarity markings inside the compartment. Close the battery compartment securely. Properly dispose of used batteries according to local regulations. Battery life varies depending on usage and environmental conditions; regular checks are recommended.

Warranty Information
Orbit Irrigation Products, Inc. provides a warranty against defects in materials and workmanship. See included documentation for specific coverage details and limitations.
Coverage Details
Orbit Irrigation Products, Inc. warrants this timer against defects in materials and workmanship for a period of one year from the date of purchase. This warranty covers repair or replacement of the defective product, at Orbit’s discretion. Damage due to improper installation, misuse, abuse, neglect, or unauthorized modification is not covered.
The warranty extends only to the original purchaser and does not cover consequential or incidental damages. Proof of purchase, such as a receipt or invoice, is required to validate any warranty claim. Contact Orbit customer support for assistance with warranty service requests and detailed instructions.
Contacting Orbit Irrigation Products
For assistance with your Orbit timer, or to submit a warranty claim, please reach out to Orbit Irrigation Products’ customer support team. You can visit their website for frequently asked questions, troubleshooting guides, and downloadable resources. Alternatively, you can contact them via phone during business hours for direct support from a knowledgeable representative.
Their website provides a contact form for submitting inquiries, and a dedicated section for warranty claims. Ensure you have your model number (27894) and proof of purchase readily available when contacting support for faster service and resolution of your issue.
Technical Specifications
The Orbit 27894 operates on standard household current and is designed for outdoor use within a specified temperature range for optimal performance.
Electrical Requirements
The Orbit 27894 timer is designed to operate with standard 120V AC, 60Hz electrical power. A properly grounded outlet is essential for safe operation and to prevent electrical shock. Ensure the power source is protected from the elements, such as rain or excessive moisture, to avoid damage to the timer or potential hazards. Do not use extension cords unless absolutely necessary, and if used, ensure they are rated for outdoor use and are in good condition. Always disconnect the power before performing any maintenance or troubleshooting procedures. Improper electrical connections can void the warranty and create a safety risk.
Operating Temperature Range
The Orbit 27894 timer is engineered for reliable performance in a variety of outdoor conditions. It’s designed to function effectively within a temperature range of 32°F to 140°F (0°C to 60°C). Operating outside this range may cause inaccurate timing or damage to the unit. Avoid exposing the timer to extreme temperatures for prolonged periods. During freezing conditions, consider removing the timer and storing it indoors to prevent potential damage from ice formation. Similarly, excessive heat can affect the timer’s internal components, reducing its lifespan and accuracy.

Model Compatibility
This guide applies to Orbit timer models 27894, 27896, 27892, 27999, 91894, 91896, 91892, and 91899, ensuring broad usability.
Compatible Orbit Timer Models (27894, 27896, 27892, 27999, 91894, 91896, 91892, 91899)
This section details the Orbit timer models fully compatible with the instructions and features outlined within this user manual. Specifically, this includes models 27894, 27896, 27892, and 27999. Furthermore, the 91894, 91896, 91892, and 91899 models are also covered, offering a wide range of supported devices.
Users possessing any of these listed Orbit timers can confidently follow the programming steps and troubleshooting guidance provided. Ensure your model number matches for optimal performance and accurate settings. Refer to the label on your timer for verification.
Remote Control Compatibility
Certain Orbit timer models, including those detailed in this manual, offer compatibility with optional remote control accessories. These remotes provide convenient, wireless control over your watering schedules from a distance, enhancing user experience and accessibility. Check your specific timer model’s documentation to confirm remote control support.
Remote functionality typically includes starting and stopping watering cycles, adjusting durations, and initiating rain delay features. Ensure the remote is properly paired with your timer following the manufacturer’s instructions for seamless operation. A dedicated remote manual provides detailed guidance.

Downloading the Manual
Access a comprehensive PDF version of the Orbit 27894 user manual, or a single-page JP2 ZIP file, for offline viewing and reference.
Accessing the PDF Manual
For a complete and detailed guide to your Orbit 27894 timer, downloading the PDF manual is highly recommended. This digital version provides all the information needed for installation, programming, troubleshooting, and maintenance in a readily accessible format. You can easily view it on any computer, tablet, or smartphone.
The PDF manual includes detailed diagrams, step-by-step instructions, and comprehensive explanations of all features and functions. It’s a valuable resource for both new users and experienced irrigation enthusiasts. Simply click the provided link to download and save the PDF to your device for convenient access whenever you need it.
Single Page Processed JP2 ZIP Download
For users requiring a specific file format, a Single Page Processed JP2 ZIP download is available. This option provides the Orbit 27894 manual pages as individual JP2 images, compressed into a ZIP archive. This format is beneficial for archiving, specific software compatibility, or detailed image analysis of the manual content.
The JP2 format offers high-resolution images while maintaining relatively small file sizes. Downloading the ZIP file allows you to extract each page as a separate image, offering flexibility in how you utilize the manual’s visual information. Ensure you have software capable of extracting ZIP archives and viewing JP2 images.