1. Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of the Intermatic T40004RT3 Pool & Spa Control System. This mechanical control system includes built-in transformers, simplifying the installation process. It serves as an all-in-one, easy-to-wire electrical control center suitable for various pool or spa installations. The enclosure houses the time switch, transformer, and other necessary components. The T40000RT Series panels are designed to accommodate additional Intermatic mechanisms and components.
2. Safety Information
WARNING: Risk of electrical shock. Installation and servicing must be performed by a qualified electrician in accordance with all national and local electrical codes.
- Always disconnect power at the circuit breaker before installing or servicing this control system.
- Ensure proper grounding and bonding of the enclosure.
- Do not operate the system if any part is damaged or missing.
- Keep the enclosure door closed and secured to protect internal components from environmental elements.
- This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm (Proposition 65 warning).
3. Product Overview
The Intermatic T40004RT3 is a robust control system designed for managing pool and spa equipment. Key features include:
- Integrated Control: Provides all-in-one control power for pool/spa installations.
- Breaker Spaces: Features eight breaker spaces for comprehensive electrical management.
- Easy Wiring: Designed for straightforward wiring and installation.
- Expandable: Can house additional Intermatic mechanisms and components.
- Durable Enclosure: Heavy-duty Type 3R metal enclosure suitable for indoor/outdoor use.
- Transformer Included: Built-in transformers for simplified setup.

This image displays the Intermatic T40004RT3 control system with its front door open. Inside, a mechanical timer is visible on the upper right, and a panel with multiple breaker spaces is located below it. The system is designed for outdoor installation, featuring a durable beige enclosure.
4. Setup and Installation
Installation of the Intermatic T40004RT3 control system should only be performed by a qualified electrician. Adherence to all national and local electrical codes is mandatory.
- Mounting: Select a suitable outdoor location for mounting the enclosure, ensuring it is easily accessible and protected from direct impact. Use appropriate hardware to securely fasten the control system to a sturdy surface.
- Power Disconnection: Before making any electrical connections, ensure that the main power supply to the installation site is completely disconnected at the circuit breaker.
- Wiring Connections:
- Connect the incoming power supply to the designated terminals within the enclosure.
- Wire the pool/spa equipment (pumps, heaters, lights) to the appropriate breaker spaces and timer terminals as per the wiring diagram provided inside the enclosure.
- Ensure all connections are tight and secure.
- Grounding and Bonding: Properly ground and bond the enclosure according to local electrical codes to prevent electrical hazards.
- Breaker Installation: Install circuit breakers into the available spaces as needed for your specific equipment. Standoffs (sold separately) may be required for certain wiring devices.
- Final Inspection: Before restoring power, double-check all wiring connections, ensure the enclosure is properly sealed, and confirm that all components are securely in place.
- Power Restoration: Carefully restore power at the main circuit breaker.
5. Operation
The T40004RT3 system utilizes a mechanical timer for scheduling equipment operation.
- Setting the Time: Rotate the dial clockwise until the current time aligns with the arrow on the timer mechanism.
- Setting ON/OFF Times: Push the trippers (small pins) on the timer dial inward for the desired ON periods and outward for the OFF periods. Each tripper typically represents a specific time interval (e.g., 15 minutes).
- Manual Override: Most mechanical timers include a manual override switch. This allows you to temporarily turn the connected equipment ON or OFF without affecting the programmed schedule. Return the switch to the "AUTO" position for normal timed operation.
- Circuit Breakers: Use the circuit breakers to manually turn power ON or OFF to individual pieces of equipment connected to the control system. Ensure the breaker handle is fully engaged in the ON or OFF position. If a breaker trips, move the handle to the full OFF position, then back to ON to reset.
6. Maintenance
Regular maintenance ensures the longevity and reliable operation of your control system.
- Periodic Inspection: Annually inspect the enclosure for any signs of damage, corrosion, or loose connections. Ensure the door latch operates correctly and seals tightly.
- Cleaning: Keep the exterior of the enclosure clean. Use a damp cloth to wipe away dirt and debris. Do not use abrasive cleaners or solvents. Ensure the interior remains dry and free of dust or insects.
- Wiring Check: With power disconnected, periodically check all wiring connections for tightness. Loose connections can lead to overheating and potential hazards.
- Timer Functionality: Verify that the mechanical timer is keeping accurate time and that the ON/OFF trippers are engaging correctly.
7. Troubleshooting
If you encounter issues with your Intermatic T40004RT3 control system, refer to the following common troubleshooting steps. Always disconnect power before inspecting internal components.
| Problem | Possible Cause | Solution |
|---|---|---|
| Equipment not turning ON/OFF as scheduled |
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| No power to equipment |
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| Timer not advancing |
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For issues not resolved by these steps, contact a qualified electrician or Intermatic customer support.
8. Specifications
| Attribute | Detail |
|---|---|
| Model Number | T40004RT3 |
| Manufacturer | Intermatic |
| Product Dimensions | 1 x 1 x 1 inches (Note: These dimensions may be placeholder/incorrect from source data, actual product is larger) |
| Item Weight | 2 pounds (Note: This weight may be placeholder/incorrect from source data, actual product is heavier) |
| Enclosure Type | Heavy-duty Type 3R metal (Indoor/Outdoor) |
| Breaker Spaces | 8 |

The CSA C US certification mark indicates that the product meets applicable Canadian and U.S. standards for safety and performance.
9. Warranty and Support
For specific warranty details, please refer to the warranty card included with your product at the time of purchase. Intermatic provides customer support for technical assistance and service inquiries.
Contact Information:
- Visit the official Intermatic website for the most current support information.
- Refer to the packaging or included documentation for customer service phone numbers.





