Integrated Control Dip Switch Settings - Lennox EL296UHE Installation Instructions Manual

Integrated Control DIP Switch Settings

EL296UHE 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 jump­
ers. 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 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 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 se­
conds. The blower off delay affects comfort and is adjust­
able 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 tempera­
tures; shorter settings provide higher supply air temperatu­
res.Table 11 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 12 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 -- Continuous
fan speed can be controlled by changing DIP switch posi­
tions. Table 13 below provides DIP switch settings for con­
tinuous fan mode.
Continuous Fan Mode Settings
Continuous Fan
Mode
Low Heat Speed
(factory)
Low Cool Speed
High High Speed
High Cool Speed
Page 44
TABLE 11
Switch 3 Switch 4
On Off
Off Off
Off On
On On
TABLE 12
Switch 5
Off
On
TABLE 13
Switch 6 Switch 7
Off Off
Off On
On Off
On On