Heating Operation Dip Switch Settings; Indoor Blower Operation Dip Switch Settings - Lennox G61MPV Service Manual

Dip Switch Settings

Heating Operation DIP Switch Settings

Switch 1 −− Thermostat Selection −− This unit may be used
with either a single−stage or two−stage thermostat. The
thermostat selection is made using a DIP switch which
must be properly positioned for the particular application.
The Dip switch is factory−positioned for use with a two−
stage thermostat. If a single−stage thermostat is to be used,
the DIP switch must be repositioned.
a − Select OFF" for two−stage heating operation con-
trolled by a two−stage heating thermostat (factory set-
ting);
b − Select ON" for two−stage heating operation con-
trolled by a single−stage heating thermostat. This set-
ting provides a timed delay before second−stage heat
is initiated.
Switch 2 −− Second Stage Delay (Used with Single−
Stage Thermostat Only) −− This switch is used to deter-
mine the second stage on delay when a single−stage ther-
mostat is being used. The switch is factory−set in the OFF
position, which provides a 10−minute delay before second−
stage heat is initiated. If the switch is toggled to the ON
position, it will provide a 15−minute delay before second−
stage heat is initiated. This switch is only activated when
the thermostat selector jumper is positioned for SINGLE−
stage thermostat use.
Switches 3 and 4 −− 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 3
and 4 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.Table 16 provides the blower off timings that will result
from different switch settings.
TABLE 16
Blower Off Delay Switch Settings
Blower Off Delay
(Seconds)
60
90
120
180

Indoor Blower Operation DIP Switch Settings

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
Switch 3 Switch 4
Off On
Off Off
On Off
On On
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 tables at the front
of this manual for corresponding cfm values.
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 adjust-
ment settings. 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 below provides blower speed adjustments that will re-
sult from different switch settings. Refer to blower 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. Table 19
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
Page 28.
NOTE − The off portion of the selected ramp profile also ap-
plies during heat pump operation in dual fuel applications.
Cooling Mode Blower Speed Ramping
Ramping Option
A (Factory)
B
C
D
Switches 11 and 12 −− Heating Mode Blower Speed −−
Switches 11 and 12 are used to select heating mode blower
motor speed. The unit is shipped from the factory with the
dip switches positioned for medium low (2) speed indoor
blower motor operation during the heating mode. The table
below provides the heating mode blower speeds that will
result from different switch settings. Refer to blower tables
at the front of this manual for corresponding cfm values.
Page 34
TABLE 17
Switch 5 Switch 6
On On
Off On
On Off
Off Off
TABLE 18
Switch 7 Switch 8
On Off
Off Off
Off On
TABLE 19
Switch 9 Switch 10
Off Off
On Off
Off On
On On