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VII−DIAGRAMS / OPERATING SEQUENCE
A−Unit Diagram HS26−261/461−1P (Early Models)
UNIT DIAGRAM
1
2
3
4
Operation Sequence
1−
WARNING−Early HS26 units use single−
pole contactors. Capacitor terminal
COM," orange condenser fan wire and
red R" compressor wire are all con
nected to L2 at all times. Remove all
power at disconnect before servicing.
2− Cooling demand energizes thermostat ter
minal Y. Voltage from terminal Y passes
through discharge temperature sensor
(compressor thermostat) and low pressure
switch to energize time delay terminal 2.
3− Time delay action is at the beginning of a
thermostat demand. When energized, time
delay TD1−1 delays 8.5 seconds before en
ergizing TD1−1 terminal 3. When TD1−1 ter
minal 3 is energized, the contactor coil is en
ergized.
4− When compressor contactor is energized,
N.O. contactor contacts close to energize
compressor terminal C" (black wire) and
black condenser fan motor wire. Condens
er fan and compressor immediately begin
operating.
