Tjernlund Products 950-0750 Fan Prover Kit

The Tjernlund Products 950-0750 Fan Prover Kit is a critical safety component designed specifically for the SS1C SideShot Series. As a veteran technician knows, maintaining proper draft pressure is non-negotiable for safe burner operation. This SS1C fan proving switch kit serves as the primary interlock, ensuring the induced draft fan is generating sufficient negative pressure before the gas valve is permitted to energize. Built for the rigors of high-cycle heating applications, the Tjernlund 950-0750 kit replaces faulty or aging sensors that can cause intermittent ignition failures or nuisance lockouts.

Installation of this draft inducer pressure switch is streamlined for field service. The kit includes the necessary sensing tube connections and bleed orifices (typically #40 or #52 depending on vent length) to calibrate the system to specific job site requirements. By monitoring the pressure within the fan housing, this HVAC ventilation safety kit prevents hazardous conditions caused by restricted venting or motor failure. When diagnosing an SS1C unit that won't sequence, checking the prover kit for reliable contact closure is your first step to restoring system integrity and code-compliant operation.

• System Compatibility: Engineered as a direct OEM replacement part for Tjernlund SS1-R and SS1C SideShot inducer models.
• Precise Pressure Monitoring: High-sensitivity diaphragm detects exact pressure thresholds to ensure safe combustion air verification.
• Field Calibration: Includes multiple bleed orifices to accommodate vent connector lengths both under and over 10 feet.
• Contractor-Grade Construction: Designed to withstand the thermal stress and pressure fluctuations of commercial and residential exhaust systems.

Common Questions

How do I determine which bleed orifice to use with the 950-0750?
If your vent connector length is less than 10 feet (3.1 meters), install the #52 bleed orifice. For runs exceeding 10 feet, the #40 orifice should be utilized to ensure accurate pressure detection.

What is the wiring configuration for this fan proving switch?
The standard 950-0750 switch uses a Blue-to-Common and Yellow-to-Normally Open wiring configuration, allowing the burner circuit to be completed only once the fan creates the required vacuum.

Why is my SS1C burner circuit tripping after 5 minutes of operation?
A trip during operation typically indicates the prover switch has detected an unsafe venting condition, such as a blocked flue or a failing inducer motor. Verify the draft pressure and ensure the sensing tube is clear of obstructions.

This item is not eligible for free shipping.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.