58TN0B/58TN1B: Installation, Start–Up, Operating and Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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device. See Thermidistat, Zone Controller, thermostat, or controller
manufacturer’s instructions for proper connection.
NOTE: For 24-V & 115-V EAC or Humidifier Accessory details, see
Accessory instructions.
A230390
Fig. 29 – Variable Speed Furnace Control for ECM Blower Motor
A230176
A230177
Fig. 30 – Thermostat Connection for Two-Stage Furnace and A/C &
Heat Pump
Notes for thermostat drawings:
1. Thermostat output signals may vary. Consult thermostat installation
instructions for more information.
2. Refer to outdoor equipment Installation Instructions for additional
information and setup procedure.
3. Configure the thermostat for air conditioner installations. Refer to
thermostat instructions.
4. Configure thermostat for HYBRID HEAT® dual fuel operation.
Refer to thermostat instructions.
5. Heat pump MUST have a high pressure switch for HYBRID
HEAT® dual fuel applications.
6. For Single-stage AC or HP, configure thermostat for single-stage
compressor operation. Refer to thermostat instructions.
7. NO connection should be made to the furnace HUM terminal when
using a thermostat with a 24 volt humidifier output.
8. For Two-Stage AC or HP, thermostat may be configured for
two-stage compressor operation, allowing the thermostat to control
staging, or thermostat may be configured for single stage operation,
allowing furnace control to control staging. Refer to note 10 and
thermostat instructions.
9. Optional connection - See Sequence of Operations, Heating
adaptive mode for additional information. If two-stage heating
thermostat output is connected to W/W1 and W2 on Two-stage
furnace control, Heating Thermostat Type (Htt) setting on furnace
control should be set to “2St” to allow thermostat to control furnace
staging.
10. For Two-stage outdoor equipment, connection is Optional - See
Cooling sequence of operations (adaptive mode) for additional
information. If two-stage HP/cooling thermostat is connected to Y1
and Y/Y2 on Two-stage furnace control board, Cooling Thermostat
Type (Ctt) (setting on furnace control) should be set to “2St” to
allow thermostat to control outdoor unit staging.
11. For Single-stage outdoor equipment, connect thermostat HP or AC
output to Y/Y2 of furnace control.
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