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HEATING ELEMENTS:
Terminal Strip TB3 is energized when the unit
disconnect closes. TB3 supplies line voltage to
electric heat elements HE1 through HE6. Each
FIRST STAGE HEAT:
Heating demand initiates at W1 in thermostat.
energized.
SECOND STAGE HEAT:
Heating demand initiates at W2 in thermostat.
is energized.
HE3 and HE4 electric heat is energized.
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