Electric Heat Diagrams And Sequence Of Operations - Lennox CBX40UHV Series Installation And Service Procedure

ELECTRIC HEAT DIAGRAMS AND SEQUENCE OF OPERATIONS

ECB40-2.5, -4, -5 and ECB40-4CB, -5CB 208/230V Single-Phase - Sequence of Operation
1. W1 of the thermostat provides a W1 demand to the AHC. The AHC outputs a 22VDC signal to the K32 relay. K32-1 closes.
2. Assuming the N.C. primary (S15) and secondary (S20) limit switches are closed, electric heat element HE1 is energized.
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CBX40UHV
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