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Integrated Control DIP Switch Settings - Conventional
Thermostat (non-communicating)
This furnace is 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 continuous
thermostat demand for heat, the watchguard will break and
remake thermostat demand to the furnace and automatically
reset the control to relight the furnace.
NOTE: All Comfort Sync™ settings are set at the Comfort
Sync™ thermostat. See Comfort Sync™ installation
instruction. In Comfort Sync™ communication system
all DIP switch and clippable link settings are ignored. For
conventional thermostats proceed with DIP switch and
clippable link settings as outlined 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 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.
Select "OFF" for two-stage heating operation controlled
by a two-stage heating thermostat (factory setting);
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 determine 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
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 30 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
individual applications. Adjust the
507404-04
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 temperatures. Table 14 provides the blower OFF
timings that will result from differentswitch settings.
Blower OFF Delay Switch Settings
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
positioned for high speed (4) indoor blower motor operation
during the cooling mode. Table 15 provides the cooling
mode blower speeds that will result from different 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 first-stage cfm. Refer to
tables for corresponding cfm values.
Cooling Mode Blower Speeds
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 16 below provides
blower speed adjustments that will result from different
switch settings. Refer to tables for corresponding cfm
values.
Cooling Blower Speed Adjustment
Switches 9 and 10 — Cooling Mode Blower Speed
Ramping —
Blower speed ramping may be used to enhance
dehumidification performance. The switches are
factory set at option A which has the greatest effect on
dehumidification performance. Table 17 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
applies during heat pump operation in dual fuel applications.
Issue 1621
Table 14
Table 15
Table 16
Page 57 of 80
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