Lennox 12L21 Pressure Switch 321894-706 it is recommended to energize

it is recommended to energize the heater for at least 24 hours before the initial seasonal startup to drive off any accumulated refrigerant

Constructed with heavy-duty materials to handle high ambient temperatures near steam or hot water lines

and 50% glycol solutions within a medium temperature range of 20°F to 250°F

Ease of Installation: Features standard 3/8-inch fittings and a generous 31-inch capillary lead for versatile mounting within the cabinet

Common Questions What burner models is this transformer compatible with

Lennox 12L21 Pressure Switch 321894-706 it is recommended to energizeAs a seasoned technician, you know that safeguarding the compressor from low side pressure drops is critical for system longevity. The Lennox 12L21 Pressure Switch is an OEM low pressure safety switch meticulously calibrated to monitor refrigerant levels and prevent vacuum conditions or evaporator freeze ups. Designed for integration into Lennox HVAC systems, including high efficiency condensing units and heat pumps, this Normally Open (NO) switch