Precision Calibration: Factory-set L70-15F rating ensures consistent 70°F opening and 55°F reset points for reliable system protection

resisting oil

Its blend of activated alumina and molecular sieve desiccants ensures maximum adsorption of water and organic acids

including model D1EG090N13046E

and rotation direction (CW/CCW) needed for your specific damper control system setup

Lennox 33W18 Pressure Switch 322027-701 Precision Calibration: Factory-set L70-15F ratingThe Lennox 33W18 is a critical two stage combustion air pressure switch designed for specific Lennox high efficiency furnace models. This differential pressure switch ensures secondary heat exchanger safety by monitoring the inducer motor's draft performance. With a dual setpoint configuration of 0. 20" WC 1. 32" WC, this switch accurately sequences the low fire and high fire combustion cycles. Proper calibration of the Lennox 33W18 pressure switch is