Crown Boiler BSI172 - Manual (Page 19)

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FIGURE 14b: WIRING MCDONNELL & MILLER WF2-U-24 FEEDER OR THREE-WIRE HYDROLEVEL
VXT-24 FEEDER TO BOILER EQUIPPED WITH #67 L.W.C.O.
CAUTION
DO NOT INSTALL
JUMPER BETWEEN 2 & 3
ON #67 L.W.C.O.
FIGURE 15: WIRING INDIRECT WATER HEATER TO BOILER