Lennox Elite CBA27UHE Series User Manual

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J-ECB29‐20CB, ‐25CB - 208/230V THREE PHASE - SEQUENCE OF OPERATION
FIRST STAGE HEAT
1- When there is a call for heat, W1 of the thermostat ener
gizes the electric heat contactor K1 with 24VAC.
2- When K1‐1 closes, the blower is energized on heat
ing speed.
3- When K1 contactor closes, assuming the N.C. pri
mary (S15) and secondary (S20) limit switches are
closed, electric heat elements HE1, HE2 and HE3
are energized.
SECOND STAGE HEAT
(remove jumper between W2 and R)
4- W2 of the thermostat sends a second stage heat de
mand, energizing the electric heat contactor K2 with
24VAC.
5- When K2‐1 closes, the blower (if not energized) is
energized on heating speed.
6- When K2 contactor contacts close, assuming the N.C.
primary (S15) and secondary (S20) limit switches are
closed, electric heat elements HE4, HE5, and HE6 are
energized.

Lennox Elite CBA27UHE Series Specifications

General

Type	Blower
Refrigerant	R-410A
Configuration	Upflow/Horizontal
Cabinet Material	Galvanized steel
Voltage	208/230V
Motor Type	ECM
Cabinet	Insulated
Warranty	5-Year Limited Warranty on covered components
Airflow Capacity	Up to 2000 CFM
Static Pressure	Up to 1.0 in. wc
Speed Settings	Variable Speed