Unit Type Jumpers; Heat Stage Jumper Positions; Air Temperature Sensor Connections; Icomfort Terminal Connections - Lennox 10T50 Installation And Setup Manual

Unit Type Jumpers

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 2. Unit Type Jumpers Positions
Jumper
Indoor Unit
Position
HP iComfort Furnace
IFC Conventional Furnace
AHC Conventional Air Handler
HP
Figure 3. Unit Type Jumper Positions
Table 3. Unit Type Jumpers Positions
Label Function / Description
HP Equipment Interface Module—Heat Pump
IFC Equipment Interface Module—Furnace (factory default)
AHC Equipment Interface Module—Air Handler

Heat Stage Jumper Positions

The heating 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.
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Figure 4. Heat Stage Jumper Positions
Outdoor Unit
Conventional Heat Pump
Conventional Heat Pump or air
conditioner
IFC AHC
1 2 3
24VAC Heat Pump Size Setting
Heat pump size must be configured when using a non-communicating heat
pump using the Heat Pump Size jumper (see figure 4 and table 5). Factory
default setting is for 3.0 (3-ton). If jumper is missing from header, alarm 130
is activated.
Figure 5. Conventional Heap Pump Capacity Jumper Setting

Air Temperature Sensor Connections

Refer to "Figure 1. Terminals and LEDs" on page 3 for various terminal
locations.
Table 4. Unit Type Jumpers Positions
Label Function / Description
Show ambient temperatures (optional if weather feed is acceptable or
outdoor unit is a communicating unit; use X2658 Outdoor Sensor - 2 ter-
minals).
Outdoor Air
NOTE: Wiring distance between the EIM and the outdoor temperature
Sensor
sensor can not exceed 150 feet (45 meters) when wired with
minimum 22AWG (Recommend) 18AWG dedicated two-
conductor thermostat cable.
Discharge Air Optional for diagnostics of indoor air; use 88K38 Discharge Air Sensor - 2
Sensor terminals.

iComfort Terminal Connections

Table 5. Unit Type Jumpers Positions
Label Function / Description
R 24VAC communication power Input
i+ Communication high – data line
i- Communication low – data line
C 24VAC communication common power Input
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