The Intermatic ST01 Series represents a self-adjusting wall switch timer designed for controlling various electrical loads. This device offers functionality for both standard and 3-way switch setups, with specific ratings for resistive, tungsten, ballast, motor, and DC loads. Installation requires adherence to electrical codes and safety precautions, including proper battery handling and wiring procedures. The documentation details potential issues and troubleshooting steps, alongside a limited one-year warranty.
Installation Procedures
The Intermatic ST01 Series requires a CR2 battery for initial setup and operation. Before physical installation, the battery must be installed and verified as functional. The process involves opening the access door below the ON/OFF keypad to reveal the battery tray. If a pull tab is present, it should be removed to connect the battery. If the battery is supplied loose, a flat screwdriver is used to pry loose the battery tray, allowing placement of the battery observing the positive (+) and negative (-) markings. The tray is then reinserted into the switch timer. The display should initialize and flash “12:00 AM” in MANual mode. Pressing the ON/OFF button should produce an audible “click,” confirming battery functionality.
For standard installations, the following steps are outlined:
- Turn off power at the service panel before beginning installation.
- Remove the existing wall switch.
- Connect the BLACK (hot) wire from the wall to the BLACK wire of the switch timer using a twist connector.
- Connect the WHITE (neutral) wire from the wall to the WHITE wire of the switch timer using a twist connector.
- Connect the GREEN wire to the grounding screw in the electrical box. If a plastic box is used, connect to ground as supplied.
- Ensure all twist connectors are secure.
For 3-way switch setups, additional steps are necessary:
- Identify the COMMON wire connected to the original switch.
- Connect the BLACK wire from the switch timer to the COMMON wire using a twist connector.
- Connect the remaining two wires from the old switch to the Blue and RED wires from the switch timer.
- Connect the GREEN wire to the grounding screw.
- A jumper wire may be required to reconnect wires "B" and "C" to the "Common" terminal of the remote switch, following diagrams provided in the documentation. The distance between the switch timer and the remote switch must not exceed 100 feet.
Electrical Ratings and Load Compatibility
The Intermatic ST01 Series is rated for a variety of electrical loads. These ratings are as follows:
- Resistive (heater): 15 Amp, 120-277 VAC
- Tungsten (incandescent): 15 Amp @ 120 VAC, 6 Amp @ 208-277 VAC
- Ballast (fluorescent): 8 Amp @ 120 VAC, 4 Amp @ 208-277 VAC
- Motors: 1 H.P. @ 120 VAC, 2 H.P. @ 240 VAC
- DC Loads: 4 Amp @ 12 VDC, 2 Amp @ 28 VDC
The documentation explicitly cautions against using the timer to control devices where inaccurate timing could have dangerous consequences, specifically mentioning sun lamps, saunas, heaters, and crock pots.
Safety Precautions
Several safety precautions are outlined in the documentation. These include:
- Electrical shock hazard: Disconnect power at the service panel before installation.
- Battery safety: Do not recharge, disassemble, heat above 100˚ C, crush, or incinerate the lithium battery. Keep the battery out of reach of children. Replace only with a Panasonic type CR2 or equivalent CR2 battery approved by Underwriters Laboratories (UL). Using a different battery type may present a risk of fire or explosion.
- Risk of fire: Avoid using the timer with devices where timing inaccuracies could be hazardous.
- Compliance: Follow all local electrical codes during installation.
- Battery leakage: Replace weak batteries promptly to prevent timer damage.
- Battery disposal: Dispose of used batteries promptly according to local regulations.
Troubleshooting Guide
The documentation provides a troubleshooting guide addressing common issues:
- Load turns off immediately after being turned on: Possible causes include a distance greater than 100 feet between the timer and remote switch, buried wire to the remote switch, or a malfunctioning switch timer.
- Battery tray difficult to replace: This may be due to misalignment or bent contact tabs.
- Sluggish or non-functioning switch timer: This could indicate a weak battery.
- Timer shows ON but the controlled device is OFF: The light or controlled device itself may be switched OFF.
If the problem persists after checking wiring and the jumper (in 3-way setups), disconnecting the red wire of the switch timer or temporarily connecting a remote switch directly at the timer can help isolate the issue. If the problem continues with the red wire disconnected or with a remote switch connected directly, the switch timer should be replaced.
Warranty Information
The Intermatic ST01 Series is covered by a limited one-year warranty from the date of purchase. This warranty covers defects in material or workmanship and provides for repair or replacement at Intermatic’s sole option. The warranty is extended only to the original purchaser and is not transferable.
The warranty does not cover:
- Damage caused by accident, dropping, abuse, acts of God, or negligent use.
- Units subjected to unauthorized repair, opening, or modification.
- Units not used in accordance with instructions.
- Damages exceeding the cost of the product.
- Sealed lamps, bulbs, LEDs, and batteries.
- Cosmetic issues such as surface wear and weathering.
- Transit damage, installation costs, removal costs, or reinstallation costs.
Intermatic Incorporated is not liable for incidental or consequential damages. The warranty is in lieu of all other express or implied warranties, and any implied warranties are limited to the duration of this warranty.
Warranty service can be obtained by returning the product to the dealer or mailing it, with proof of purchase, postage prepaid, to the authorized service center at 7777 Winn Rd., Spring Grove, Illinois 60081-9698. Secure packaging is recommended to prevent shipping damage.
Conclusion
The Intermatic ST01 Series switch timer offers a versatile solution for automating electrical loads. Proper installation, adherence to safety precautions, and understanding the device’s limitations are crucial for optimal performance and longevity. The provided documentation outlines these aspects comprehensively, along with troubleshooting guidance and warranty details. Users should carefully review these instructions before installation and operation.