Dip Switch Settings; Blower Off Delay Switch Settings; Cooling Mode Blower Speeds; Blower Speed Adjustment - Lennox G60DFV Unit Information

Dip Switch Settings

Switches 1 and 2 − Blower Off Delay The blower−on delay
of 45 seconds is not adjustable. The blower−off delay (time
that the blower operates after the heating demand has
been satisfied) can be adjusted by moving switches 1 and 2
on the integrated control board. The unit is shipped from
the factory with a blower−off delay of 90 seconds. The
blower off delay affects comfort and is adjustable to satisfy
individual applications. Adjust the blower off delay to
achieve a supply air temperature between 90° and 110°F at
the exact moment that the blower is de−energized. Longer
off delay settings provide lower supply air temperatures;
shorter settings provide higher supply air temperatu-
res.The table below provides the blower off timings that will
result from different switch settings.
TABLE 7

Blower Off Delay Switch Settings

Blower Off Delay
(Seconds)
60
90
120
180
Switch 3 − Second Stage Delay (Used with Single−Stage
Thermostat Only) This switch is used to determine the
second stage on delay when a single−stage thermostat is
being used. The switch is factory−set in the ON position,
which provides a 10−minute delay before second−stage
heat is initiated. If the switch is toggled to the OFF position,
it will provide a 15−minute delay before second−stage heat
is initiated. This switch is only activated when the thermo-
stat selector jumper is positioned for SINGLE−stage ther-
mostat use.
Switch 4 − Not used
Switches 5 and 6 − Cooling Mode Blower Speed
Switches 5 and 6 are used to select cooling blower motor
speed. The unit is shipped from the factory with the dip
switches positioned for high speed (4) indoor blower motor
operation during the cooling mode. The table below pro-
vides the cooling mode blower speeds that will result from
different switch settings. Refer to blower data tables at the
front of this manual for corresponding cfm values.
Switch 1 Switch 2
Off Off
Off On
On Off
On On

Cooling Mode Blower Speeds

Speed
1 − Low
2 − Medium Low
3 − Medium High
4 − High (Factory)
Switches 7 and 8 − Blower Speed Adjustment Switches
7 and 8 are used to select blower speed adjustment set-
tings. The unit is shipped from the factory with the dip
switches positioned for NORMAL (no) adjustment. The dip
switches may be positioned to adjust the blower speed by
+10% or −10% to better suit the application. The table be-
low provides blower speed adjustments that will result from
different switch settings. Refer to blower data tables at the
front of this manual for corresponding cfm values.

Blower Speed Adjustment

Adjustment
+10% (approx.)
NORMAL (Factory)
−10% (approx.)
Switches 9 and 10 − Cooling Mode Blower Speed
Ramping −− Switches 9 and 10 are used to select cooling
mode blower speed ramping options. Blower speed ramp-
ing may be used to enhance dehumidification perfor-
mance. The switches are factory set at option A which has
the greatest effect on blower motor performance. The table
below provides the cooling mode blower speed ramping
options that will result from different switch settings. The
cooling mode blower speed ramping options are detailed
on the next page. See unit nameplate for manufacturing
date.
Cooling Mode Blower Speed Ramping
Ramping Option
A (Factory)
B
C
D
Page 12
TABLE 8
Switch 5 Switch 6
On On
Off On
On Off
Off Off
TABLE 9
Switch 7 Switch 8
On Off
Off Off
Off On
TABLE 10
Switch 9 Switch 10
Off Off
On Off
Off On
On On