Unit Diagram; Cbx40Uhv - 208/230V Single Phase - Sequence Of Operation - Lennox CBX40UHV Series Installation And Service Procedure

UNIT DIAGRAM

CBX40UHV - 208/230V SINGLE PHASE - SEQUENCE OF OPERATION

1. Line voltage is routed to transformer T1 and blower motor B3.
2. T1 supplies 24VAC to terminal strip TB2, which supplies 24VAC to the indoor thermostat and electric heat, if used.
HEATING
3. W1 of the thermostat provides a W1 demand to the AHC. The AHC outputs a 22VDC signal to the K32 relay contained
in the ECB40 heat section. (See electric heat diagrams for operation).
4. AHC energizes blower motor B3 on heating speed.
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CBX40UHV