59SC6A: 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.
Alternate Power Supplies
This furnace is designed to operate on utility generated power which has
a smooth sinusoidal waveform. If the furnace is to be operated on a
generator or other alternate power supply, the alternate power supply
must produce a smooth sinusoidal waveform for compatibility with the
furnace electronics. The alternate power supply must generate the same
voltage, phase, and frequency (Hz) as shown in Table 11 or the furnace
rating plate.
Power from an alternate power supply that is non-sinusoidal may
damage the furnace electronics or cause erratic operation.
Contact the alternate power supply manufacturer for specifications and
details.
A11157
Fig. 37 – Field-Supplied Isolation Relay for Humidifiers with
Internal Power Supply
A210192
Fig. 38 – Example of Single Stage Furnace Control
A230219
A230220
Fig. 39 – Thermostat Wiring Diagrams for Single Stage Furnace
with Single-Speed A/C & Heat Pump
Notes for thermostat wiring diagrams:
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
utilizing the thermostat’s 24-volt humidifier output.
THERMOSTAT
See notes 1, 2, 3, 6, 7 and 8
Single-Stage Furnace with Single-Speed Air Conditioner
NOTE 7
THERMOSTAT
See notes 1, 2, 3, 4, 5, 6, 7 and 8
Single-Stage Furnace with Single-Speed Heat Pump
NOTE 7
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