Tjernlund Products, Inc. PS1505 Pressure Switch

Description:

The TJERNLUND PS1505 Pressure Switch is used in mechanical draft systems to verify inducer fan operation before allowing combustion equipment to operate safely. Commonly installed on gas- and oil-fired furnaces, boilers, unit heaters, and other heating appliances equipped with draft inducers requiring a fixed vacuum proving switch. Maintenance teams, HVAC contractors, and OEMs use this pressure switch for replacement, retrofit, or integration into burner safety interlock systems.

Applications:

The TJERNLUND PS1505 Pressure Switch is commonly used with TJERNLUND AUTO-DRAFT draft inducers and UC1 Universal Control modules in residential, commercial, and light industrial HVAC systems. The switch monitors vacuum pressure within the inducer housing to verify blower operation before enabling burner ignition, helping ensure safe and code-compliant operation of gas- and oil-fired heating equipment.

Technical Specifications:

• Manufacturer: TJERNLUND
• Model: PS1505
• Product type: Pressure switch
• Switch type: SPST, normally open snap-action contacts
• Contact rating: 125 VA pilot duty at 24 VAC; 300 VA pilot duty at 115–277 VAC
• Maximum switching current: 15 A non-inductive at 277 VAC
• Control set point: Fixed, non-adjustable
• Operating pressure: 0.05 ± 0.02 in. W.C. increasing vacuum
• Maximum pressure: 1/2 psi
• Mounting position: Diaphragm vertical
• Operating temperature: -40°F to 190°F (-40°C to 88°C)
• Electrical connections: #6-32 screw terminals with cup washers
• Application: Draft inducer and burner safety interlock systems

Common Replacements:

• TJERNLUND PS-1505
• Cleveland Controls NS2 Series
• Dwyer 1950 Series Pressure Switch