507581-04
Issue 1933
Page 43 of 59
Integrated Control DIP Switch Settings
A96UH2E units are equipped with a two-stage 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.
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
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 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.
Indoor Blower Operation DIP Switch Settings -
Switches 3 and 4 -- Heating Mode 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 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 10 provides the blower off
timings that will result from different switch settings.
Table 10. Blower Off Heating Mode Delay Switch
Settings
Blower Off Delay
(Seconds)
Switch 3
Switch 4
60
On
Off
90 (Factory)
Off
Off
120
Off
On
180
On
On
Switch 5 -- Cooling Mode Blower-Off Delay--
The unit
is shipped from the factory with the dip switch positioned
OFF for a 45 second delay. Table 11 provides the cooling
mode off delay settings.
Blower Off Delay
(Seconds)
Switch 5
45 (Factory)
Off
2
On
Table 11. Blower Off Cooling Mode Delay Switch
Settings
Switches 6 and 7 -- Continuous Fan Mode --
Continuous
fan speed can be controlled by changing DIP switch
positions. Table 12 provides DIP switch settings for
continuous fan mode.
Table 12. Continuous Fan Mode Settings
Continuous Fan Mode
Switch 6
Switch 7
Low Heat Speed (factory)
Off
Off