Integrated Control Settings - Lennox G60UHV?36A?070 Installation Instructions Manual

Integrated Control Settings

G60UHV units are equipped with a two−stage, variable
speed integrated control. This control manages ignition
timing, heating mode fan off delays and indoor blower
speeds based on selections made using the control dip
switches and jumpers. The control includes an internal
watchguard feature which automatically resets the ignition
control when it has been locked out. After one hour of con-
tinuous thermostat demand for heat, the watchguard will
break and remake thermostat demand to the furnace and
automatically reset the control to relight the furnace.
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.
TheDIP 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. 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 individ-
ual 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 set-
tings provide higher supply air temperatures.Table 11 pro-
vides the blower off timings that will result from different
switch settings.
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
operation during the cooling mode. The table below pro-
vides the cooling mode blower speeds that will result from
different switch settings. Refer to tables 16 through 25 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 result
from different switch settings. Refer to tables 16 through 25
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 14
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.
NOTE − The off portion of the selected ramp profile also ap-
plies during heat pump operation in dual fuel applications.
Page 28
TABLE 11
Switch 3 Switch 4
Off On
Off Off
On Off
On On
TABLE 12
Switch 5 Switch 6
On On
Off On
On Off
Off Off
TABLE 13
Switch 7 Switch 8
On Off
Off Off
Off On