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and Honeywell P431X-1092
and UDAS series
It maintains a pressure rating of 0-110 PSI for #2 fuel oil (60 SSU) and #4 fuel oil (300 SSU)
the Resideo DP3040B5002 specifically requires a 120Vac coil voltage
it should be integrated into a system with a primary thermostat
Lennox 78H11 Thermostat 319852-301 and Honeywell P431X-1092As a seasoned technician, you know that a frozen outdoor coil is a quick way to kill system efficiency and stress the compressor. The Lennox 78H11 is a critical heat pump defrost thermostat (L70 35F) designed specifically to regulate the defrost cycle in Lennox heat pump applications. This OEM Lennox replacement part features a fixed temperature range, initiating the defrost sequence when the liquid line or coil temperature drops to 35F and
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