Carrier PG92MSA - Page 28

PG92MSA: 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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A11157
Fig. 37 – Field-Supplied Isolation Relay for Humidifiers with
Internal Power Supply
A210192
Fig. 38 – Example of Single Stage Furnace Control
A190081
Fig. 39 – Thermostat Wiring Diagrams
Notes for thermostat wiring diagrams
1. Heat pump MUST have a high pressure switch for HYBRID
HEATr dual fuel applications.
2. Refer to outdoor equipment Installation Instructions for additional
information and setup procedure.
3. If the heat pump date code is 1501E or earlier, select the “ZONE”
position on the two speed heat pump control. Heat pumps with date
code 1601E and later do not have or require a “ZONE” selection.
4. Outdoor Air Temperature Sensor must be attached in all HYBRID
HEATr dual fuel applications.
5. Configure the thermostat for air conditioner, installations. Refer to
thermostat instructions.
6. Configure the thermostat for heat pump installations. Refer to
thermostat instructions.
7. Configure the thermostat for single-stage compressor installations.
Refer to thermostat instructions.
8. Configure the thermostat for HYBRID HEAT
®
dual fuel operation
installations. Refer to thermostat instructions.
9. NO connection should be made to the furnace HUM terminal when
using a thermostat with a 24 volt humidifier output.
10. When connecting humidifier with its own 115 VAC supply use
isolation relay between furnace and humidifier.
11. If thermostat has internal control of heat pump balance point, DO
NOT SELECT the “FURNACE INTERFACE” or “BALANCE
POINT” option on the two-speed heat pump control board. Refer to
thermostat instructions.
12. Thermostat signals may vary. Consult thermostat installation
instructions for more information.
THERMOSTAT
THERMOSTAT
*
*
D
D
See notes 2, 5, 7, 9, and 12
See notes 1, 2, 4, 6, 7, 8, 9, 11, and 12
Single-Stage Furnace with Single-Speed Air Conditioner Single-Stage Furnace with Single-Speed Heat Pump