Description
The Lennox 51M87 Pressure Switch is one of the safety devices that should always be installed in your HVAC system. It uses an SPDT configuration to monitor the air pressure within the system. When the pressure gets to a certain value of 1.6 Inches of the water column, the normally open contacts switch, and cause actions within your Lennox equipment to happen. This essential function assists in keeping safe operation by avoiding high pressure that may harm parts of the equipment.
