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Lennox HS26 Series User Manual

Lennox HS26 Series
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Page 18
C−Unit Diagram HS26−036/060−1Y, −048/−060−1G Three−phase (Late Models)
Operation Sequence
1− Cooling demand energizes thermostat terminal Y. Voltage from terminal Y passes through low pressure
switch and timed off control (T.O.C.), which energizes K1 compressor contactor coil (provided 5 minute delay
is satisfied.)
2− K1−1, K1−2 and K1−3 contacts close energizing B1 compressor and B4 outdoor fan.
3− When cooling demand is satisfied, K1−1, K1−2 and K1−3 contacts open de−energizing compressor and out
door fan. Timed off control begins 5 minute off time.
NOTE−Three−phase compressors must be phased correctly. Compressor noise will be significantly higher if phasing is
incorrect. Compressor will operate backwards so unit will not provide cooling. Continued backward operation will cause
compressor to cycle on internal protector.

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Lennox HS26 Series Specifications

General IconGeneral
Compressor TypeScroll
RefrigerantR-410A
Cooling Capacity1.5 to 5 tons
SeriesHS26
StagesSingle-stage
CompressorScroll
Warranty5-Year Limited Warranty on covered components
Sound LevelAs low as 76 dB

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