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Heat strip 1 schematic diagram l2 notes. Control wiring for combination boilers thermostats for combination boilers external programmers for combination boilers combination boiler with 2 heating zones 230v switching combination boiler with 2 heating zones volt. The white wire from the heater or air conditioner control is mounted to the w terminal on the thermostat mounting plate.
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Heat pump wiring diagram schematic 5 wire thermostat wiring book diagram schema. Use copper wire 75ºc min only between disconnect switch and unit. The boiler the boiler is the main component of a central heating. To be wired inaccordance with necand local codes.