Lennox EL296DFE Series Manual page 14

Integrated Control DIP Switches
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 de-
mand 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 appli-
cation. The DIP switch is factory-positioned for use with a
twostage 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
a two-stage heating thermostat (factory setting);
b. Select "ON" for two-stage heating operation controlled
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 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 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 de-
lay to achieve a supply air temperature between 90° and
110°F at the exact moment that the blower is de-ener-
gized. Longer off delay settings provide lower supply air
temperatures; shorter settings provide higher supply air
temperatures. Table 5 provides the blower off timings that
will result from different switch settings.
Blower Off Heating Mode Delay Switch Settings
Blower Off Delay
Seconds
60
90 (factory)
120
180
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 6 provides the cooling
mode off delay settings.
Blower Off Cooling Mode Delay Switch Settings
Blower Off Delay Seconds
45 (factory)
2
Switches 6 and 7 -- Continuous Fan Mode -- Continu-
by
ous fan speed can be controlled by changing DIP switch
positions. Table 7 below provides DIP switch settings for
by
continuous fan mode.
Continuous Fan Mode Settings
Continuous Fan
Mode
Low Heat Speed
(factory setting)
On-Board Link W914 Dehum
On-board link W914, is a clippable connection between
terminals R and DS on the integrated control. W914 must
be cut when the furnace is installed with a thermostat
which features humidity control. If the link is not cut, termi-
nal "DS" will remain energized not allowing the blower to
reduce to low cool speed upon a call for dehumidification.
On-Board Link W951 Heat Pump (R to O)
On-board link W951 is a clippable connection between
terminals R and O on the integrated control. W951 must
be cut when the furnace is installed in applications which
include a heat pump unit and a thermostat which features
dual fuel use. If the link is left intact, terminal "O" will re-
main energized eliminating the HEAT MODE in the heat
pump.
On-Board Link W915 2 Stage Compr (Y1 to Y2)
On-board link W915 is a clippable connection between
terminals Y1 and Y2 on the integrated control. W915 must
be cut if two-stage cooling will be used. If the Y1 to Y2 link
is not cut the outdoor unit will operate in second-stage
cooling only.
Page 14
TABLE 5
Switch 3 Switch 4
On Off
Off Off
Off On
On On
TABLE 6
Switch 5
Off
On
TABLE 7
Switch 6 Switch 7
Off Off