Introduction
This manual provides essential instructions for the safe and effective installation, operation, and maintenance of your Lennox 67K65 DPDT 24-Volt AC Relay. Please read this manual thoroughly before attempting any procedures to ensure proper function and to prevent damage or injury. The Lennox 67K65 is a genuine OEM replacement part designed for reliability and performance in various applications requiring a DPDT 24-volt alternating current coil relay.
Important Safety Information
WARNING: Electrical shock hazard. Disconnect all power to the equipment before installing, servicing, or removing this relay. Failure to do so can result in serious injury or death.
- Installation should only be performed by qualified personnel.
- Ensure the relay's specifications match the system requirements (e.g., voltage, current).
- Do not operate the relay if it appears damaged.
- Use genuine OEM parts for safety, reliability, and performance.
Product Overview
The Lennox 67K65 is a Double Pole Double Throw (DPDT) relay with a 24-volt alternating current (AC) coil. It is designed as a direct replacement part for various Lennox systems. Its robust construction ensures reliable switching operations.
Image of the Lennox 67K65 DPDT 24-Volt AC Relay, showing its compact design and terminal connections. This image illustrates the physical appearance of the relay.
Setup and Installation
- Power Disconnection: Before beginning installation, ensure all power to the system where the relay will be installed is completely disconnected. Verify with a voltage meter.
- Locate Existing Relay: Identify the old relay to be replaced. Note its orientation and wiring connections. It is recommended to take a photograph of the existing wiring for reference.
- Remove Old Relay: Carefully disconnect all wires from the old relay. If the relay is DIN rail mounted, release it from the rail.
- Install New Relay: Mount the Lennox 67K65 relay in the designated position. Ensure it is securely fastened, especially if it is DIN rail mounted.
- Wire Connections: Connect the wires to the new relay according to the system's wiring diagram and your reference photograph. The relay has 3 terminals for connection. Ensure all connections are secure and correct. Pay close attention to the coil voltage (24-volt AC) and contact ratings.
- Verify Installation: Double-check all wiring connections for accuracy and tightness. Ensure no loose wires are present.
- Restore Power: Once installation is complete and verified, restore power to the system.
- Test Operation: Test the system to confirm the new relay is functioning correctly.
Note: Some users have reported that the decal on the relay case may not always accurately reflect pin orientation. Always refer to the system's wiring diagram and verify pin functions before connecting wires to avoid incorrect installation.
Operating Instructions
The Lennox 67K65 relay operates automatically as part of a larger control system. When the 24-volt AC coil is energized, the DPDT contacts switch, changing the electrical path for the connected circuits. When the coil is de-energized, the contacts return to their normal state.
- Ensure the control signal to the relay coil is within the specified 24-volt AC range.
- Monitor the system for proper switching action as per the equipment's design.
- The relay is designed for continuous automatic operation within its specified electrical limits.
Maintenance
The Lennox 67K65 relay is a sealed component and generally requires minimal maintenance. However, periodic inspection is recommended to ensure optimal performance and longevity.
- Visual Inspection: Periodically inspect the relay for any signs of physical damage, discoloration, or overheating. Check for loose or corroded wire connections.
- Cleaning: If necessary, gently clean the exterior of the relay with a dry, soft cloth. Do not use solvents or abrasive cleaners. Ensure power is disconnected before cleaning.
- Environmental Conditions: Ensure the operating environment remains within the recommended temperature and humidity ranges for electrical components to prevent premature failure.
- Replacement: If the relay shows signs of malfunction, such as inconsistent switching, audible buzzing, or visible damage, it should be replaced immediately by a qualified technician.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Relay does not energize/switch | No power to coil, incorrect coil voltage, faulty wiring, damaged relay coil. | Check 24-volt AC power supply to the coil. Verify wiring connections. Test coil resistance (if possible). Replace relay if coil is faulty. |
| Relay contacts do not make/break circuit | Damaged contacts, incorrect wiring, insufficient load. | Verify load circuit wiring. Check for continuity across contacts when energized/de-energized. Replace relay if contacts are damaged. |
| Relay buzzes or hums excessively | Loose mounting, incorrect AC frequency, internal damage. | Ensure relay is securely mounted. Verify AC frequency. Replace relay if buzzing persists and is not due to external factors. |
| Overheating | Overcurrent, incorrect voltage, poor ventilation. | Check load current against relay ratings. Verify coil voltage. Ensure adequate airflow around the relay. Replace if damage is evident. |
If troubleshooting steps do not resolve the issue, contact a qualified technician for further assistance.
Specifications
| Model Number | 67K65 |
| Brand | Lennox |
| Part Number | 67K65 |
| Contact Type | DPDT (Double Pole Double Throw) |
| Coil Voltage | 24 Volts AC |
| Maximum Switching Voltage | 24 Volts |
| Minimum Switching Voltage | 24 Volts |
| Contact Material | Silver |
| Connector Type | Screw |
| Mounting Type | DIN Rail Mount |
| Number of Terminals | 3 |
| Operation Mode | Automatic |
| Item Weight | 0.2 Pounds |
| Unit Count | 1.0 Count |
| Specification Met | OEM |
Warranty Information
As a genuine OEM replacement part, the Lennox 67K65 relay is typically covered by the standard warranty terms provided by Lennox for their replacement components. Specific warranty details, including duration and coverage, may vary. Please refer to your original product documentation or contact Lennox customer support for precise warranty information.
Support
For technical assistance, installation questions, or warranty claims regarding your Lennox 67K65 DPDT 24-Volt AC Relay, please contact Lennox customer support or a certified Lennox service technician. Ensure you have your product model number (67K65) and any relevant system information available when seeking support.
You can typically find contact information on the official Lennox website or through your authorized Lennox dealer.