1. Important Safety Information
Please read and understand all instructions before installing or operating this device. Failure to follow these instructions could result in electrical shock, fire, or serious injury.
- Disconnect power at the circuit breaker or fuse box before installing or servicing.
- Installation and wiring must comply with all national and local electrical codes.
- This device is intended for indoor use in a NEMA 1 enclosure.
- Do not exceed the maximum electrical ratings of the device.
- Ensure all connections are secure and properly insulated.
- If you are unsure about any part of these instructions, consult a qualified electrician.
2. Product Overview
The Intermatic T101B is a heavy-duty 24-hour mechanical time switch designed for residential, commercial, and industrial applications. It provides direct 24-hour control for various electrical loads up to 40 Amps. This model features a single-pole, single-throw (SPST) switch and includes one ON and one OFF tripper for programming daily operations.
Key features include:
- Controls electrical loads up to 40 Amps.
- Provides direct 24-hour control of most loads.
- Capable of 1 to 12 ON/OFF operations each day.
- Minimum ON/OFF time of 1 hour.
- Manual override capability.
- Equipped with one ON and one OFF tripper.
- Separate clock motor terminals for switching circuits not on line voltage.
This image displays the packaging for the Intermatic T101B Mechanical Time Switch. The packaging highlights features such as all-metal construction, heavy-duty lockable metal enclosure, tamper-proof design, resistance to temperature extremes, and heavy-duty gear train. The model number T101B and voltage 120V are clearly visible, along with a diagram of the timer dial and isolated input/output terminals.
3. Specifications
| Feature | Value |
|---|---|
| Model Number | T101B |
| Operating Voltage | 120 Volts |
| Current Rating | 40 Amps |
| Operation Mode | Automatic |
| Contact Type | Normally Open (SPST) |
| Connector Type | Screw Terminals |
| Circuit Type | 1-way |
| Minimum ON/OFF Time | 1 Hour |
| Product Dimensions (L x W x H) | 7 x 7 x 7 inches |
| Item Weight | 2.7 Pounds |
| Manufacturer | Intermatic |
4. Installation (Setup)
Installation of the Intermatic T101B should be performed by a qualified electrician in accordance with all national and local electrical codes. Ensure power is disconnected before beginning installation.
4.1 Mounting
- Select a suitable indoor location for mounting the timer, ensuring it is protected from moisture and extreme temperatures.
- Securely mount the timer's enclosure to a wall or suitable surface using appropriate fasteners.
4.2 Wiring
Refer to the wiring diagram provided inside the timer's enclosure for specific connection details. The T101B features screw terminals for connections.
- Line (L): Connect the incoming 120V power supply to the 'LINE' terminal.
- Load (LOAD): Connect the wire leading to the appliance or lighting fixture you wish to control to the 'LOAD' terminal.
- Neutral (N): Connect the neutral wire from the power supply to the 'NEUTRAL' terminal.
- Ground (GND): Connect the ground wire to the designated ground terminal.
- Clock Motor Terminals: If using separate power for the clock motor, connect the appropriate voltage to the dedicated clock motor terminals as per the internal diagram. Otherwise, the clock motor typically draws power from the line voltage.
After wiring, ensure all connections are tight and the enclosure is properly closed before restoring power.
5. Operation
The Intermatic T101B uses a mechanical dial and trippers for programming.
5.1 Setting the Current Time
- Rotate the dial clockwise until the current time aligns with the time arrow or indicator on the timer mechanism.
- Ensure AM/PM is correctly observed if your dial has such markings.
5.2 Programming ON/OFF Cycles
The T101B comes with one ON tripper and one OFF tripper. Additional trippers can be purchased separately for more cycles.
- Locate the ON tripper (typically green or silver) and the OFF tripper (typically red or black).
- To set an ON time, push the ON tripper onto the dial at the desired time.
- To set an OFF time, push the OFF tripper onto the dial at the desired time.
- Ensure the trippers are firmly seated and make contact with the switch mechanism as the dial rotates.
- The minimum time between an ON and OFF tripper is 1 hour.
5.3 Manual Override
The timer includes a manual override switch, typically a lever or button, that allows you to temporarily turn the connected load ON or OFF without affecting the programmed schedule. The timer will resume its programmed schedule at the next scheduled ON or OFF event.
6. Maintenance
The Intermatic T101B is designed for reliable operation with minimal maintenance.
- Periodically inspect the timer for any signs of damage or loose connections.
- Keep the enclosure clean and free from dust and debris.
- Do not lubricate any internal components.
- If the timer is exposed to harsh environments, ensure the enclosure remains sealed.
7. Troubleshooting
If you encounter issues with your Intermatic T101B, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Timer does not turn ON/OFF at programmed times. | Trippers not set correctly or loose. | Ensure ON/OFF trippers are firmly seated on the dial at the desired times. |
| Load remains ON or OFF continuously. | Manual override engaged. | Check the manual override switch and return it to the automatic position. |
| Clock dial is not advancing. | No power to the clock motor or motor failure. | Verify power supply to the timer. If power is present and the dial still doesn't move, the clock motor may require service or replacement. |
| No power to the connected load. | Loose wiring, tripped circuit breaker, or faulty timer. | Check all wiring connections. Reset the circuit breaker. If issues persist, consult a qualified electrician. |
8. Warranty and Support
8.1 Warranty Information
Intermatic products are manufactured to high-quality standards and are typically backed by a limited warranty. For specific warranty terms and conditions applicable to your T101B model, please refer to the warranty card included with your product or visit the official Intermatic website.
8.2 Customer Support
For technical assistance, troubleshooting, or inquiries regarding your Intermatic T101B time switch, please contact Intermatic customer support. You can find contact information, FAQs, and additional resources on the official Intermatic website or by visiting their store on Amazon: Intermatic Store.
