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Integrated Control DIP Switch Settings
Conventional Thermostat (non-communicating)
Units are equipped with a two-stage, variable speed inte-
grated control. This control manages ignition timing, heat-
ing mode fan o delays and indoor blower speeds based
on selections made using the control dip switches and
jumpers. The control includes an internal watchguard fea-
ture which automatically resets the ignition control when
it has been locked out. After one hour of continuous ther-
mostat demand for heat, the watchguard will break and
remake thermostat demand to the furnace and automati-
cally reset the control to relight the furnace.
Note: All communicating settings are set at the communi-
cating thermostat. See thermostat installation instruction.
In a communication system all DIP switch and clippable
link settings are ignored. For conventional thermostats
proceed with DIP switch and clippable link settings as out-
lined in the following.
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 appli-
cation. 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 controlled by a
two-stage heating thermostat (factory setting);
b. Select “ON” for two-stage heating operation controlled by
a single-stage heating thermostat. This setting 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 de-
termine the second stage on delay when a single-stage
thermostat is being used. The switch is factory-set in the
OFF position, which provides a 7-minute delay before
second-stage heat is initiated. If the switch is toggled to
the ON position, it will provide a 12-minute delay before
second-stage heat is initiated. This switch is only activat-
ed when the thermostat selector jumper is positioned for
Single stage thermostat use.
Switches 3 and 4 -- Blower-O Delay -- The blower-on
delay of 30 seconds is not adjustable. The blower-o delay
(time that the blower operates after the heating demand
has been satised) can be adjusted by moving switches 3
and 4 on the integrated control. The unit is shipped from
the factory with a blower-o delay of 90 seconds. The
blower o delay aects comfort and is adjustable to sat-
isfy individual applications. Adjust the blower o delay to
achieve a supply air temperature between 90° and 110°F
at the exact moment that the blower is de-energized. Lon-
ger o delay settings provide lower supply air tempera-
tures; shorter settings provide higher supply air tempera-
tures. TABLE 6 provides the blower o timings that will
result from dierent switch settings.
TABLE 6
Blower O Delay Switch Settings
Blower O Delay
Seconds
Switch 3 Switch 4
60 On O
90 (factory) O O
120 O On
180 On On
Indoor Blower Operation DIP Switch Settings
Switches 5 and 6 -- Cooling Mode Blower Speed -- The
unit is shipped from the factory with the dip switches po-
sitioned for high speed (4) indoor blower motor operation
during the cooling mode. TABLE 7 provides the cooling
mode blower speeds that will result from dierent switch
settings. Switches 5 and 6 set the blower cfm for second-
stage cool. The integrated control automatically ramps
down to 70% of the second-stage cfm for rst-stage cfm.
Refer to tables for corresponding cfm values. See Product
Specications for more detailed blower cfm tables.
TABLE 7
Cooling Mode Blower Speeds
Speed Switch 5 Switch 6
Low On On
Medium Low O On
Medium High On O
High (factory) O O
Switches 7 and 8 -- Cooling Blower Speed Adjustment
-- 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. TABLE 8 below pro-
vides blower speed adjustments that will result from dif-
ferent switch settings. Refer to tables for corresponding
cfm values. See Product Specications for more detailed
blower cfm tables.
TABLE 8
Cooling Blower Speed Adjustment
Adjustment Switch 7 Switch 8
+10% (approx) On O
Factory Default O O
-10% (approx) O On
Switches 9 and 10 -- Cooling Mode Blower Speed
Ramping -- Blower speed ramping may be used to en-
hance dehumidication performance. The switches are
factory set at option A which has the greatest eect on de-
humidication performance. TABLE 9 provides the cooling
mode blower speed ramping options that will result from
dierent switch settings. The cooling mode blower mode
blower speed ramping options are detailed on the next
page.
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