When the electromagnetic coil is energized

making it a staple for technicians maintaining precise environmental setpoints in complex air handling and hydronic configurations

Durable Construction: Metal case and high-quality internal components are designed for long-term operation in demanding outdoor HVAC environments

is specifically designed for heating applications and typically closes as the temperature at the sensor increases

Tjernlund Products 950-0029 Pressure Switch 320734-701 When the electromagnetic coil isAs a veteran HVACR technician, you know that keeping a side wall venter system online depends on precise airflow verification. The Tjernlund 950 0029 Pressure Switch is the mandatory fan proving switch designed specifically for Tjernlund SS2 venter systems. Featuring a non adjustable set point factory calibrated at . 40 W. C. on pressure drop, this replacement air pressure switch ensures the burner only fires when the draft inducer has established