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TYPICAL EL280UH FIELD WIRING DIAGRAM
FIGURE 32
FIGURE 33
TWO−STAGE INTEGRATED CONTROL
THERMOSTAT CONNECTIONS (TB1)
1/4" QUICK CONNECT TERMINALS
DIP SWITCH FUNCTIONS
DIP
SWITCHES
DIAGNOSTIC
LEDs
ON−BOARD
LINKS
1= ERROR CODE RECALL
H= 24V HUMIDIFIER OUTPUT
L= LENNOX SYSTEM OPERATION MONITOR
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 −−
HIGH HEAT AND LOW COOL SPEED
COOL HIGH = 120 VAC OUTPUT TO CIRC BLWR −− HIGH COOL SPEED
DIP SWITCH(ES) FUNCTION
1 −− 2 Stage T’stat Selects t/stat type (single or two−stage)
2 −− 2nd Stage Delay Second stage ON delay (single−stage t’stat)
3 & 4 −− Heat Off Delay Heating fan OFF delay
5 −− Cool Off Delay Cooling fan OFF delay
W915
W951