Lennox CB26UH Series Installation Instructions Manual page 12

The cooling blower speed is factory configured to provide
correct airflow for an outdoor unit that matches the
maximum cooling capacity rating of the air handler.
If the outdoor unit is smaller than the maximum cooling
capacity rating for the air handler, the cooling blower speed
may need to be changed. Refer to Blower Performance
Chart, table 4.
CHANGE BLOWER SPEED
NOTE - Refer to wiring diagram (figure 12) and blower
performance (table 4).
,&WARNING
1. Disconnect all power supplies.
2. Remove the air handler access panel.
3. Locate pin number 2 on the blower relay. Two black
wires are connected to this terminal pin. One connects
to pin number 5 on the blower relay, one connects to
an inline splice connecting to a red wire.
4. Remove the wire going to the 4-pin blower motor
connector from the splice.
5. Connect the blower lead [Red (LO), Black (HI)] onto
the splice from the 4-pin blower motor connector.
NOTE - Reuse the factory-installed plastic cap
on whichever wire is not used.
6, Replace all panels,
7, Reconnect power,
NOTES FOR TABLE 4 - All air data measured external to unit with 1
inch non-pleated air filter in place,
Electric heaters have no appreciable air resistance.
All factory settings are high-speed.
A data g ven wh ear hander s operatng wth a drydx co .
505059M 04_8
Page 12