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Lennox TAA120S4D

Lennox TAA120S4D
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Page 24
V − Wiring Diagrams
TAA072/240 − SEQUENCE OF OPERATION
1. W1 heat demand energizes the economizer relay K43.
2. When K43−1 closes blower relay K3 is energized.
3. K3−1 closes energizing indoor blower B3.

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