Intermatic ST01 Instruction Manual: A Comprehensive Guide
This guide provides detailed instructions for installing, operating, and troubleshooting the Intermatic ST01 series timer, ensuring optimal performance and versatile lighting control․
Overview of the Intermatic ST01 Timer
The Intermatic ST01 is a robust, in-wall digital timer designed for a wide range of applications, primarily focused on controlling lighting systems․ It offers both astronomical and countdown timing functionalities, providing users with flexible scheduling options․ This timer is particularly well-suited for residential and light commercial environments where automated lighting control is desired․

Unlike traditional mechanical timers, the ST01 utilizes digital programming, allowing for precise and repeatable on/off schedules․ It eliminates the need for a neutral wire, simplifying installation in many existing setups․ The timer supports both temporary and permanent override features, granting manual control when needed․
Furthermore, the ST01 boasts a user-friendly interface, making programming relatively straightforward, even for those unfamiliar with digital timers․ It’s a programmable package offering versatile control, and detailed information can be found on the Intermatic website at www․intermatic․com․
Key Features and Specifications
The Intermatic ST01 timer distinguishes itself through several key features․ It supports both Astro mode, utilizing astronomical time for dusk-to-dawn operation, and Countdown mode for setting temporary durations․ A significant advantage is its operation without requiring a neutral wire, simplifying installation․ The inclusion of manual override control – both temporary and permanent – provides flexible operational adjustments․
Specifications include a heavy-duty design suitable for various lighting loads․ The timer is programmable, allowing for complex ON/OFF schedules․ It’s designed for in-wall mounting and operates as a single-pole switch․ The ST01/ST01K/EI600 models are compatible with standard wiring configurations, though diagrams should be consulted for proper installation․
Users can access detailed specifications and further information on the Intermatic website (www․intermatic․com)․ This timer offers a blend of convenience, reliability, and advanced functionality for automated lighting control․
Package Contents and Initial Inspection
Upon receiving your Intermatic ST01 timer, carefully inspect the package for any signs of damage during shipping․ The package should contain the ST01 timer unit itself, this installation and user guide, and potentially mounting hardware depending on the specific model (ST01/ST01K/EI600)․
Before installation, verify that all components are present and undamaged․ Examine the timer unit for any physical defects, such as cracks or broken terminals․ Ensure the packaging includes the necessary documentation for proper setup and operation․
If any components are missing or damaged, immediately contact Intermatic Incorporated or the retailer from whom you purchased the timer․ Do not attempt to install a damaged unit․ Retain all packaging materials for potential return or warranty claims․ Proper initial inspection ensures a smooth installation process․

Installation Procedures
Carefully follow these instructions for safe and effective installation of your Intermatic ST01 timer, ensuring proper wiring and secure mounting for reliable operation․

Wiring Diagrams for ST01 Series
Understanding the wiring configurations is crucial for a successful installation of the Intermatic ST01 timer․ The ST01 series utilizes specific wiring schemes that differ from conventional toggle switch setups, demanding careful attention to detail․ Refer to the diagrams provided within this manual and on the Intermatic website (www․intermatic․com) for accurate connections․
Typically, the wiring involves connecting the line (hot) wire, the neutral wire, and the load wire to the designated terminals on the timer․ Ensure the power is OFF at the breaker before commencing any wiring work․ Incorrect wiring can lead to malfunction or safety hazards․ Pay close attention to the terminal markings and wire colors․ Diagrams illustrate both standard and specific configurations for various applications․ Always double-check your connections against the diagram before restoring power․
For assistance, consult a qualified electrician if you are unsure about any aspect of the wiring process․ Intermatic provides detailed diagrams to facilitate a smooth and safe installation experience․
Mounting the Timer – Wall Installation
Securely mounting the Intermatic ST01 timer is essential for stable operation․ Begin by selecting a suitable location on the wall, ensuring it’s free from obstructions and moisture․ Mark the mounting holes using the timer’s backplate as a template․ Drill pilot holes at the marked locations, appropriate for your wall type․
Attach the backplate to the wall using the provided screws, ensuring it’s level and firmly secured․ Carefully align the timer with the backplate and snap it into place․ Verify that the timer is securely attached and doesn’t wobble․ Avoid over-tightening the screws, as this could damage the timer housing․
Ensure all wiring connections are neatly tucked inside the electrical box before fully securing the timer․ Proper mounting prevents strain on the wiring and ensures long-term reliability․ Refer to the installation guide for detailed visual instructions․

Operational Modes
The ST01 timer offers versatile control through Manual, Astro, and Countdown modes, providing flexible scheduling options for diverse lighting and appliance needs․
Manual Override Functionality
The Intermatic ST01 timer incorporates a robust manual override system, allowing users to temporarily adjust programmed schedules without permanently altering the established settings․ This feature is invaluable for situations requiring immediate control, such as unexpected changes in daylight or temporary operational needs․
Two distinct override options are available: temporary and permanent․ The temporary override activates the programmed function for a defined period, reverting to the original schedule afterward․ Conversely, the permanent override maintains the altered state until manually reset, providing sustained control․
Activating the manual override is straightforward, typically involving a dedicated button or switch on the timer’s interface․ The display will clearly indicate when the override is active, ensuring users are aware of the current operational status․ This functionality enhances the timer’s adaptability and user-friendliness, making it suitable for a wide range of applications․
Astro Mode – Utilizing Astronomical Time

The Intermatic ST01’s Astro Mode leverages astronomical time calculations to automatically adjust ON/OFF schedules based on sunrise and sunset times for a specified location․ This eliminates the need for manual adjustments throughout the year, ensuring lights activate and deactivate in sync with natural daylight patterns․
To utilize Astro Mode, users must initially input their geographical location, typically through zip code or latitude/longitude coordinates; The timer then calculates the precise sunrise and sunset times, dynamically adjusting the programmed schedule accordingly․
Astro Mode offers customizable offset settings, allowing users to fine-tune the activation and deactivation times relative to sunrise and sunset․ This feature provides flexibility for specific lighting requirements and preferences․ It’s an energy-efficient and convenient solution for outdoor lighting control, maximizing energy savings and enhancing security․
Countdown Mode – Setting Temporary Durations
The Intermatic ST01’s Countdown Mode provides a convenient method for setting temporary ON or OFF durations, ideal for applications requiring timed operation without altering the primary schedule․ This feature is particularly useful for temporary lighting needs, such as holiday decorations or short-term equipment operation․
Users can easily program a specific countdown duration, ranging from minutes to hours, during which the timer will maintain the selected state (ON or OFF)․ Once the countdown expires, the timer automatically reverts to its previously programmed schedule․
Countdown Mode offers flexibility for various applications, allowing for precise control over temporary durations․ It’s a simple and effective way to manage lighting or equipment operation for a limited time, without disrupting the established programming․ This mode enhances the ST01’s versatility and user-friendliness․

Programming the ST01 Timer
Effectively utilize the ST01 by setting the current time and date, creating customized ON/OFF schedules, and leveraging the permanent override feature for control․
Setting the Current Time and Date
Accurate time and date settings are crucial for the ST01 timer’s scheduling functions to operate correctly․ Begin by pressing the ‘MODE’ button until you reach the time setting screen․ Use the ‘ON/OFF’ buttons to advance the hour, ensuring you observe AM/PM indicators․
Subsequently, press ‘MODE’ again to adjust the minutes, utilizing the ‘ON/OFF’ buttons for precise setting․ Continue pressing ‘MODE’ to navigate to the date setting, adjusting the month, day, and year sequentially with the ‘ON/OFF’ buttons․
Confirm each setting by allowing the timer to automatically advance or by pressing ‘MODE’ to move to the next parameter․ Remember to double-check the displayed time and date for accuracy, as incorrect settings will impact scheduled events․ Refer to the Intermatic website, www․intermatic․com, for further assistance if needed․
Creating and Scheduling ON/OFF Programs
Programming ON/OFF schedules allows for automated control of connected devices․ Access the programming mode by pressing the ‘PROG’ button․ Utilize the ‘ON/OFF’ buttons to select a desired program number – the ST01 supports multiple programs for varied scheduling․
Next, set the ON time by adjusting the hour and minute using the ‘ON/OFF’ buttons, then press ‘PROG’ to confirm․ Repeat this process to set the OFF time․ Continue programming additional ON/OFF cycles as needed for your desired schedule․
To activate a program, ensure it’s enabled within the program list․ The timer supports daily or specific day-of-the-week scheduling․ Consult www․intermatic․com for detailed examples and advanced programming options․ Remember to save your settings before exiting programming mode․

Using the Permanent Override Feature
The Permanent Override function allows users to maintain a chosen ON or OFF state indefinitely, bypassing programmed schedules․ Activate this feature by pressing and holding the ‘OVERRIDE’ button until the indicator light illuminates, signifying permanent override is engaged․
While in Permanent Override, the timer will disregard all scheduled programs, maintaining the selected state until manually disengaged․ To return to scheduled programming, press and hold the ‘OVERRIDE’ button again until the indicator light turns off․
This feature is ideal for extended periods requiring consistent operation, such as seasonal lighting or vacation settings․ Refer to Intermatic’s website (www․intermatic․com) for detailed instructions and safety precautions regarding override functionality․ Always confirm the override status before relying on scheduled programs․

Troubleshooting Common Issues
This section addresses frequent problems with the Intermatic ST01 timer, offering solutions for power failures, programming errors, and ensuring reliable operation․
Timer Not Powering On – Potential Causes
If the Intermatic ST01 timer fails to power on, several factors could be responsible․ First, verify the power supply to the timer is active and within the specified voltage range․ Check the circuit breaker or fuse associated with the timer’s wiring; a tripped breaker or blown fuse will immediately halt operation․
Inspect the wiring connections meticulously․ Loose or disconnected wires are a common culprit․ Ensure all wires are securely fastened to their respective terminals, following the correct wiring diagrams for the ST01 series․ A faulty wiring configuration can prevent power from reaching the timer․
Consider the battery, if applicable․ Some ST01 models utilize a battery for maintaining the time and program during power outages․ A depleted battery might not provide sufficient power for initial startup․ Replace the battery with a fresh one of the correct type․ Finally, examine the timer itself for any visible signs of damage, such as burnt components or a cracked casing, which could indicate an internal failure requiring replacement․

Programming Errors and Solutions
Incorrect programming is a frequent issue with the Intermatic ST01 timer․ If the timer isn’t operating as expected, review the programmed ON/OFF schedules carefully․ Ensure the correct time and date are set, as these are fundamental to accurate scheduling․ Double-check the day selections (weekday, weekend, or specific days) for each program․
Verify the ON and OFF times are entered correctly, paying attention to AM/PM designations․ A common error is accidentally setting the wrong time format․ If using Astro Mode, confirm the latitude and longitude settings are accurate for your location, as these impact astronomical time calculations․
When using Countdown Mode, ensure the desired duration is entered correctly․ To correct errors, use the programming buttons to navigate to the incorrect setting and modify it․ Refer to the manual for specific button sequences․ If issues persist, reset the timer to factory defaults and reprogram from scratch․
Warranty Information and Contact Details
Intermatic Incorporated provides a warranty covering defects in materials and workmanship for the ST01 timer․ The warranty period varies depending on the specific model and date of purchase; consult the product packaging or Intermatic’s website for precise details․ This warranty does not cover damage resulting from misuse, improper installation, or unauthorized modifications․
To initiate a warranty claim, retain your proof of purchase and contact Intermatic customer support․ For detailed warranty information, visit www․intermatic․com․ You can also reach Intermatic by mail at Intermatic Incorporated, Libertyville, Illinois 60048․
For technical support, troubleshooting assistance, or general inquiries, contact Intermatic’s customer service team through their website or by phone․ Their knowledgeable representatives can guide you through setup, programming, and resolving any operational issues you may encounter with your ST01 timer․