TM 5-3895-374-24-2LOW-OILFLOATSWITCHThe low-oil float switch is wired into the heater control circuit to prevent operation of the burner ifthe oil in the expansion tank reaches a dangerously low level. Operation of the burner in a low-oilsituation will cause overheating and burnout of the heater coiling. The unit is factory lubricated toinsure a lifetime of trouble-free service. Never use lubricants on the pivot sockets as unnecessaryadditions will cause malfunctions. If the mercury tube ever appears cloudy or cracked, it shouldbe replaced.page 3 - 1158
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