C - A 10
TCONT900AC43UA Installer’s Guide
4 Heat/3 Cool/ Heat Pump
Communicating Programmable 3-Wire Hookup
(A/T)CONT900AC43UA Installer Guide
Table 4. Installer Setup Menu Continued.
No humidity option available if 3 is
selected
Note: If single stage is configured, ODU will run Low Stage,
but ID airflow ill be 100%. If 3-Three Stage is configured,
there will be an Err 89 on stat but unit will run.
For 3 stage furnace:
Option 1 = High stage heat only
Option 2 = Medium and high stage heat only
For modulating furnace:
Option 1 = High stage heat
Option 2= Modulating
Option 3 = 40% or 100% - No modulation
Note: If anything else is configured, other than
“E1”, then the blower will not run in cooling with
a furnace but continuous fan and heat will op-
erate blower okay/
Note: Auto discovered low stage airflow for 20
SEER:
2 Ton = 50%
3 Ton = 55%
4 Ton = 50%
5 Ton = 65%
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