Lennox EL280DF Series Unit Information page 7

Switch 5 -- Cooling Blower-Off Delay -- The cooling
blower-off delay (time that the blower operates after the
cooling demand has been satisfied) can be adjusted by
moving switch 5 on the integrated control. The switch is fac­
tory-set in the OFF position, which provides a cooling blow­
er-off delay of 45 seconds. If the switch is toggled to the ON
position, it will provide a 2-second cooling blower-off delay
On-Board Link W951 Heat Pump (R to O)
On-board link W951 is a clippable connection between ter­
DIAGNOSTIC
LEDs
DIP
SWITCHES
TABLE 2
SureLight control 5 Pin Terminal Designation
PIN #
1
2 Combustion Air Inducer High Speed
3
4
5
TWO-STAGE INTEGRATED
ON-BOARD
LINKS
W915
W951
2 -- 2nd Stage Delay
3 & 4 -- Heat Off Delay
Function
Ignitor
Combustion Air Inducer Low Speed
Combustion Air Inducer Neutral
Ignitor Neutral
minals 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 remain ener­
gized 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 ter­
minals 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 cool­
ing only.
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 & CONT
FAN
HEAT HIGH/ COOL LOW = 120 VAC OUTPUT TO CIRC BLWR --
HIGH HEAT AND LOW COOL SPEED
COOL HIGH = 120 VAC OUTPUT TO CIRC BLWR -- HIGH COOL SPEED
THERMOSTAT CONNECTIONS (TB1)
1= ERROR CODE RECALL
H= 24V HUMIDIFIER OUTPUT
L= LENNOX SYSTEM OPERATION MONITOR
DIP SWITCH FUNCTIONS
DIP SWITCH(ES)
1 -- 2 Stage T'stat Selects t/stat type (single or two-stage)
Second stage ON delay (single-stage t'stat)
Heating fan OFF delay
5 -- Cool Off Delay Cooling fan OFF delay
FIGURE 5
SureLight control 12Pin Terminal Designation
PIN #
1
2
3
4
5
6
7
8
9
10
11
12
Page 7
FUNCTION
TABLE 3
Function
Gas Valve High Fire
Second Stage pressure Switch
Rollout In
Ground
24V Hot
Primary Limit In
Gas Valve Low Stage
Gas Valve Common
24V Neutral
Ground
Rollout Switch Out
1st Stage pressure Switch