Lennox 10T50 User Manual

6
Heat Stage Jumper Positions
The factory default setting is position 2 (two heat stages). If jumper is
missing from the jumper pins, then alarm 130 is activated. Depending on
the type of equipment and system set up being used:
• Set the number of stages of electric heat (air handler) when jumper pin
selection is AHC selection.
• Set the number of stage of gas heat (Furnace) when jumper pin selection
is IFC.
• Set the number of stages of the compressor when jumper pin selection
is HP.
0 1 2 3
Figure 4. Heat Stage Jumper Positions
Table 3. Heat Stage Jumpers
Label
(Position)
Air Handler Heat
Stages
Furnace Heat Stages Heat Pump Stages
Number of
Electric Heat
Stages
Stage
Percentage
Number of
Gas Stages
Stage
Percentage
Number of
Compressors
Stages
Stage
Percentage
0
No Electric
Heat
0 1 100% 1 100%
1 1 100% 1 100% 1 100%
2
(default)
2
50%,
100%
2
70%.
100%
2
70%.
100%
3 3
33.5%,
66.5%,
100%
2
70%,
100%
2
70%.
100%
NOTE: If jumper is missing, setting defaults to single stage. Changing jumper position
after power-up requires recommission for the change to be recognized.
24VAC Heat Pump Size Setting
Heat pump size must be congured when using a non-communicating heat
pump using the Heat Pump Size jumper (see gure 4 and table 5). Factory
default setting is for 3.0 (3-ton). If jumper is missing from jumper pins then
alarm 130 is activated.
1.
5
2.
0
2.
5
3.
0
3.
5
4.
0
5.
0
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. Outdoor Air and Discharge Air Sensors
Label Function / Description
Outdoor Air
Sensor
Show ambient temperatures (optional if weather feed is acceptable or
outdoor unit is a communicating unit; use X2658 Outdoor Sensor - 2
terminals).
NOTE: Wiring distance between the EIM and the outdoor temperature
sensor can not exceed 150 feet (45 meters) when wired with
minimum 22AWG (Recommend) 18AWG dedicated two-
conductor thermostat cable.
Discharge Air
Sensor
Optional for diagnostics of indoor air; use 88K38 Discharge Air Sensor -
2 terminals.
Lennox Communicating Terminal Connections
Table 5. Communicating Terminals
Label Function / Description
R 24VAC communication power Input
i+ Communication high – data line
i- Communication low – data line
C 24VAC communication common power Input

Lennox 10T50 Specifications

General

Brand	Lennox
Model	10T50
Category	Recording Equipment
Language	English