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The Honeywell L7224U1002 Oil Electronic Aquastat Controller provides electronic temperature sensing in a UL limit-rated controller with a single sensing probe. The Honeywell L7224U1002 Oil Electronic Aquastat Controller controls the circulator oil burner and boiler temperature. This Aquastat Controller is intended for use in residential-type applications. The Honeywell L7224U1002 Oil Electronic Aquastat Controller provides status and diagnostic information through an LED display combined with LED lights to enhance the diagnostic process. This unit is “Outdoor Temperature Resetready which is enabled when connected to the 50022037-002 Outdoor Reset Module and C7089U Outdoor Temperature Sensor. It can also interface with the 50022037-005 Domestic Hot Water Module for prioritization of a domestic hot water call for heat. Ideal for indirect tank applications.