Description
The Tjernlund Products PS1505 is a Single Pole Single Throw (SPST) Air Pressure Proving Switch engineered to verify adequate combustion airflow before allowing burner operation. Designed for use with induced-draft and power-vented heating appliances, this pressure proving switch provides a critical safety interlock that protects equipment and occupants by confirming proper draft or air pressure conditions are present within the specified .03″–.07″ water column range.
Key Features
- SPST (Single Pole Single Throw) switching action for straightforward safety interlock wiring
- Operating pressure range: .03″ to .07″ water column — ideal for low-pressure proving applications
- Designed to prove combustion air or draft pressure before burner ignition
- Compatible with induced-draft blowers, power venters, and combustion air systems
- Compact, durable construction for reliable long-term performance
- Manufactured by Tjernlund Products, a trusted name in combustion air and venting solutions
Application
The PS1505 is commonly used as a safety interlock in residential and light commercial heating systems. It is wired into the burner control circuit and closes (or opens) upon sensing the required air pressure differential, ensuring the combustion blower or power venter is operating correctly before fuel is introduced. This prevents unsafe operation in the event of a blocked flue, failed inducer, or inadequate combustion air supply.
Specifications
- SKU: PS1505
- Brand: Tjernlund Products
- Switch Type: SPST (Single Pole Single Throw)
- Pressure Range: .03″ – .07″ W.C. (Water Column)
- Function: Air Pressure Proving / Safety Interlock
- Application: Induced-draft and power-vented heating appliances
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