1. Introduction
The Soler & Palau SFM is a percentage timer control designed with a furnace interlock feature. This unit integrates with your existing HVAC system to manage ventilation by activating the furnace blower for a set percentage of time, ensuring compliance with continuous ventilation standards.
Image 1.1: The front panel of the Soler & Palau SFM control unit. It features a vertical row of percentage indicators (10% to 100%) with corresponding LED lights, showing the current runtime percentage. The Soler & Palau (S&P) logo is visible on the lower right.
2. Key Features
- Functions as an alternate primary control for Soler & Palau TR70, TR130, TR200, and TR300 units.
- Connects to the TR unit and either a thermostat or furnace control to activate the furnace blower.
- Utilizes a six-wire, low-voltage connection for safe and efficient operation.
- Designed to meet ASHRAE 62.2 continuous ventilation standards.
3. Specifications
| Brand | Soler & Palau |
| Model | SFM |
| Part Number | TR130 |
| Special Feature | Timer |
| Connection Type | Six-wire, Low Voltage |
| Product Dimensions | 15 x 12 x 9 inches |
| Item Weight | 1 pound (16 ounces) |
| Material | Copper (internal components) |
| Batteries Required | No |
4. Setup and Installation
The SFM control unit is designed for low-voltage integration with existing HVAC systems. It requires a six-wire connection to the TR unit and either the thermostat or the furnace control. This setup enables the SFM to activate the furnace blower when the ERV (Energy Recovery Ventilator) starts, ensuring proper air circulation for ventilation.
Important: Installation should be performed by a qualified HVAC technician to ensure correct wiring and compliance with local electrical codes. Incorrect installation can lead to system malfunction or electrical hazards.
5. Operation
The Soler & Palau SFM operates as a percentage timer control. This means it activates the furnace blower for a set percentage of a given cycle, ensuring continuous ventilation as required by ASHRAE 62.2 standards. The specific runtime percentage can be configured during installation or by a qualified technician. The front panel features indicators for runtime percentage, typically ranging from 10% to 100%, as shown in Image 1.1.
6. Maintenance
The Soler & Palau SFM is designed for minimal maintenance. Periodically inspect the unit for any visible damage or loose connections. Ensure the area around the control unit is clean and free from obstructions. For any internal issues or complex repairs, contact a qualified service technician.
7. Troubleshooting
- Unit Not Activating Blower: Verify all low-voltage connections are secure. Ensure the TR unit and furnace control are receiving power. Consult a qualified technician if the issue persists.
- Incorrect Runtime: If the furnace blower runs for an unexpected duration, the percentage setting may need adjustment. This typically requires a qualified technician.
- No Indicator Lights: Check the power supply to the unit. If power is present and lights remain off, contact technical support.
8. Warranty Information
The Soler & Palau SFM Furnace Interlock Time Control comes with a 1-year limited warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. For warranty claims or detailed terms and conditions, please refer to the official Soler & Palau warranty documentation or contact customer support.
9. Technical Support
For technical assistance, installation guidance, or service inquiries, please contact Soler & Palau customer support. Visit the official Soler & Palau website for contact information and additional resources.