Unit Type Jumpers; Heat Stage Jumper Positions; Air Temperature Sensor Connections - Lennox iComfort E30 Installation And Setup Manual

Table 3. Conventional Terminals (24VAC)
Label Description Function
Used as reversing valve output for heat pumps. The EIM uses
a single-pole dual throw relay to generate O and B signals.
Heat pump reversing
O
Normally the O output is open and B output at 24VAC during
valve (24VAC = cool)
heating calls. During cooling calls O is 24VAC and B open.
With relay de- energized 24VAC is present on O terminal.
Heat pump reversing When power off/ or control reset, 24VAC power shall not be
B
valve (24 VAC = heat) present on the O terminal.
u t J
nit ypE umpErs
Set the unit type jumper for the type of indoor unit being used (see figure 2 and
table 4). The factory default setting is IFC. If jumper is missing from header, alarm
130 is activated.
Table 4. Unit Type Jumpers Positions
Jumper
Indoor Unit
Position
HP DO NOT USE
IFC Conventional Furnace
AHC Conventional Air Handler
HP
DO NOT
USE
Figure 3. Unit Type Jumper Positions
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Eat tagE umpEr ositions
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 figure 3 and table 8).
The factory default setting is position 2. If jumper is missing from header, alarm 130
is activated.
0
Figure 4. Heat Stage Jumper Positions
Outdoor Unit
Conventional Heat Pump or air condition-
er
IFC AHC
1 2 3
Table 5. Heat Stage Jumpers
Air Handler Heat
Stages
Label
(Position)
No Electric
0 0
Heat
1 1 100%
2
2 50%, 100%
(default)
33.5%,
3 3 66.5%,
100%
NOTE: If jumper is missing, setting defaults to single stage. Changing jumper position after pow-
er-up requires recommission for the change to be recognized.
a t s C
ir EmpEraturE Ensor onnECtions
Label Function / Description
Show ambient temperatures (optional if weather feed is acceptable; use X2658
Outdoor Sensor - 2 terminals).
Outdoor Air
NOTE:
Wiring distance between the thermostat and the outdoor temperature
Sensor
sensor can not exceed 200 feet (61 m) when wired with 18AWG ther-
mostat wire.
Optional for diagnostics of indoor air; use 88K38 Discharge Air Sensor - 2 termi-
nals.
Discharge Air
NOTE: Wiring distance between the furnace or air handler control module and
Sensor
the discharge air sensor should not exceed 10 feet (3 meters) when
wired with 18 #AWG thermostat wire.
7
Furnace Heat Stages Heat Pump Stages
1 100% 1
1 100% 1
2 70%, 100% 3
2 70%, 100% 3
Table 6. Sensors
100%
100%
70%, 100%
70%, 100%