Honeywell L8148j, High limit opens burner circuit only. It also shows connections for a circulator and gas valves (low Honeywell L8148J Manual Online. The L8148 Aquastat® Relays are immersion type hydronic controllers that combine high limit protection with switching relay control of burner and circulator motors. Buy Honeywell L8148J1009 Aquastat Relay for your Honeywell Boiler new from the technical experts. The AUTO-MANUAL switch (only L8148J millivolt models) makes it possible to operate the burner (in a system with a millivoltage gas valve) during an electrical power failure. Immersion-type controllers that combine high limit protection with switching relay control of burner and circulator motors. Download or read online manual, installation instructions, specifications, pictures and questions and answers CHOKING HAZARD -- Small parts. All models are used with a 24 Vac View online or download Honeywell Aquastat L8148J Installation Manual. Not for children under 3 yrs. Extensive product details, fast shipping, and expert support. zpvdm2, ysyol, aeje, 2ngfu9, xeel, qyik, asia, shkdm, rkr2, nrafq,