Integrated Control - Lennox ELITE Series Installation Instructions Manual

DIAGNOSTIC
LEDs
DIP
SWITCHES

Integrated Control

EL280UH units are equipped with a two-stage integrated
control. This control manages ignition timing and fan off
delays based on selections made using the control DIP
switches. The control includes an internal watchguard fea­
ture which automatically resets the integrated control when
it has been locked out. After one hour of continuous ther­
mostat demand for heat, the watchguard will break and re­
make thermostat demand to the furnace and automatically
reset the control to relight the furnace.
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);
TWO-STAGE INTEGRATED
CONTROL
1/4" QUICK CONNECT TERMINALS
SENSE = 120 VAC OUTPUT TO FLAME SENSOR
NEUTRALS= 120 VAC NEUTRAL
PARK = DEAD TERMINAL FOR UNUSED BLOWER LEAD
HEAT LOW = 120 VAC OUTPUT TO CIRC BLWR -- LOW HT SPEED
HEAT HIGH/ COOL LOW = 120 VAC OUTPUT TO CIRC BLWR --
COOL HIGH = 120 VAC OUTPUT TO CIRC BLWR -- HIGH COOL SPEED
THERMOSTAT CONNECTIONS (TB1)
ON-BOARD
LINKS
1= ERROR CODE RECALL
H= 24V HUMIDIFIER OUTPUT
L= LENNOX SYSTEM OPERATION MONITOR
W915 DIP SWITCH(ES)
1 -- 2 Stage T'stat
W951
2 -- 2nd Stage Delay
3 & 4 -- Heat Off Delay
5 -- Cool Off Delay
FIGURE 30
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 10-minute delay before second-
stage heat is initiated. If the switch is toggled to the ON
position, it will provide a 15-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 -- Heating Blower-Off Delay -- The
heating blower-on delay of 30 seconds is not adjustable.
The heating blower-off delay (time that the blower operates
after the heating demand has been satisfied) can be ad­
justed by moving switches 3 and 4 on the integrated con­
trol. The unit is shipped from the factory with a heating
blower-off delay of 90 seconds. The heating blower off
delay affects comfort and is adjustable to satisfy individual
applications. Adjust the blower off delay to achieve a sup­
Page 28
HIGH HEAT AND LOW COOL SPEED
DIP SWITCH FUNCTIONS
Selects t/stat type (single or two-stage)
Second stage ON delay (single-stage t'stat)
Heating fan OFF delay
Cooling fan OFF delay
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.
FUNCTION