Lennox iComfort E30

7
ConvEntional EquipmEnt tErminal ConnECtions
Table 3. Conventional Terminals (24VAC)
Label Description Function
W1
First-stage heat output (rst-stage gas heat output when congured as
furnace (IFC) and rst-stage electric heat output when congured as air
handler (AHC).
W2
Second-stage heat output (second-stage gas heat output when
congured as IFC and second-stage electric heat output when
congured as AHC.
W3
Third-stage heat output (third-stage electric heat output when
congured as air handler)
G
Indoor blower control (continuous fan) (monitoring only). G input may
be connected to IAQ devices such as humidier, Lennox Ventilation
Control System and Heat or Energy Recovery Ventilators to turn the
indoor blower on and off.
Y2 Second-stage compressor output.
Y1 First-stage compressor output.
DS
24VAC dehumidication signal output. The DS terminal is powered
when there is not a dehumidication call.
C
Class II, 24VAC
transformer
common
R and C terminals are used to receive power from
the indoor unit and capable of provid ing the power
to the Smart Hub and all the associated loads.
The R power input uses a 3A fuse (Lennox part
number 25J49.
R
Class II. 24VAC
transformer power
H 24VAC humidier signal output.
O
Heat pump
reversing valve
(24VAC = cool)
Used as reversing valve output for heat pumps.
The EIM uses a single-pole dual throw relay to
generate O and B signals. Normally the O output
is open and B output at 24VAC during heating
calls. During cooling calls O is 24VAC and B open.
With relay de- energized 24VAC is present on O
terminal.
When power off/ or control reset, 24VAC power
shall not be present on the O terminal.
B
Heat pump
reversing valve (24
VAC = heat)
unit typE JumpErs
Set the unit type jumper for the type of indoor unit being used (see “Figure 2. E30
Smart Hub Indicators and External Components” on page 5 and “Table 4. Unit
Type Jumpers Positions”). The factory default setting is IFC. If jumper is missing
from header, alarm 130 is activated.
Table 4. Unit Type Jumpers Positions
Jumper
Position
Indoor Unit Outdoor Unit
HP DO NOT USE
IFC Conventional Furnace
Conventional Heat Pump or air
conditioner
AHC Conventional Air Handler
HP IFC AHC
DO NOT
USE
Figure 3. Unit Type Jumper Positions
hEat stagE JumpEr positions
The heat staging Jumper must be set for the number of stages of electric heat (air
handler) or the number of stage of gas heat (furnace) and stages of heat pump.
Using the heat stages jumper (see gure 3 and table 8).
The factory default setting is position 2. If jumper is missing from header, alarm 130
is activated.
0 1 2 3
Figure 4. Heat Stage Jumper Positions