LENNOX 51W90 -.65"wc SPST Pressure Switch

-.65"wc SPST Pressure Switch

LENNOX's 51W90 -.65"wc SPST Pressure Switch is a fail safe modulating valve switch that is suitable for use in venting equipment and appliances. This spst pressure switch has a simple pressure-spark ignition and non-thermal overload protection, which allows the switch to be used safety in indoor applications. This pressure switch is ideal for boiler fan fans, water heaters, air conditioning units when using on-off control. SPST Pressure Switch also features two-post burner terminals and mounting holes for quick connection.

The 51W90 controls Direct-Fired hydronic heating systems such as boilers, humidifiers and furnaces. It is a .65"wc SPST Pressure Switch with factory preset at 155 psi.

Lennox SX Air Conditioner: On/Off Pressure Switch Lennox 51W90 .65"wc SPST Pressure Switch. Lennox requires the following part numbers for a complete replacement. BP21-1-05, BP21-1-03, SX3051X, or SX3051X-A.

The Lennox 51W90 .65"wc SPST Pressure Switch comes with a brushless motor and available 115V/60Hz, 230V/50Hz, or 277V/60Hz for cost-effective operation. Its pressure is range adjustable to .40 to 1.25 PSI. With a 20 psi default, an external reset, and replaceable limit switch, this switch is designed for the residential HVAC market.

The .65""Wc SPST Pressure Switch (Part No. 51W90) controls the burner output of a natural gas, propane or dual fuel wall furnace. This pressure switch is designed to open at approximately 3.0""wc (15 psig), the normal operation setting of the pressure regulator valve. The switch must be set to slightly below this point, if it is used in conjunction with a super-fast gas valve. Using a pressure switch with a super-fast gas valve will result in flame failure and possible damage to the equipment if not done correctly.

The Lennox 51W90-0.65"WC SPST Pressure Switch is a switch that is used with the L111B or L2005B models.

The 2 position SPST (single pole, single throw) Pressure Switch is ideal to set equipment pressure levels or shut down equipment pressures during process startups and shutdowns.