→ WIRING DIAGRAM NOTES
1. Heat pump must have a high pressure switch for dual fuel applications.
2. Outdoor Air Sensor must be attached for all dual fuel applications.
3. Dip switch setting No. 1 must be OFF (open) for heat pump operation.
4. Dip switch setting No. 2 must be OFF (open) for 2-speed compressor operation.
5. Dip switch setting No. 3 must be OFF (open) for 3-stage heat operation.
6. Dip switch setting No. 8 must be OFF (open) for dual fuel operation.
7. Refer to outdoor equipment Installation Instructions for proper setup.
8. Select "ZONE" position on 2-speed heat pump control board.
9. Do not select "dual fuel" option on 2-speed heat pump control board. The zoning system will control this function.
10. Jumper wire must be installed between DEF and O terminal at Equipment Controller for proper defrost operation.
11. Configuration Option No. 10 (at User Interface) must be activated to select dual fuel crossover temperature. Configuration Option No. 9
is optional in selecting an auxiliary heat lockout temperature.
12. It is recommended to let the zoning system control furnace staging. Refer to indoor unit Installation Instructions for proper setup.
13. Refer to Fan Coil Installation Instructions for features and additional wiring information.
14. To activate dehumidify function on FK4C, remove J1 jumper at fan coil control board.
15. Configuration Option No. 7 (at User Interface) should be activated to indicate variable-speed (ICM) blower motor.
16. To activate dehumidify feature on current style variable-speed 80% non-condensing furnace, disconnect green (DHUM) wire from G on
furnace control board and connect to dehumidify terminal on Equipment Controller.
17. To activate dehumidify feature on current style variable-speed furnace (i.e., 355MAV), a pilot duty 24vac relay must be used.
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