Honeywell RTH8500 - Alternate wiring (heat pump system only)

Installation Guide
18
About your new thermostat
Select system type
Function
0170
Press s/t to select your system type:
Options: 1 Heat/cool: Gas, oil or electric heating with central air conditioning.
2 Heat pump: Single-stage heat pump (no backup or auxiliary heat).
3 Heat only: Gas, oil or electric heat without central air conditioning.
4 Heat only with fan: Gas, oil or electric heat without central air conditioning.
5 Hot water heat (no fan): Gas, oil or hot water heat without central air
conditioning.
6 Cool only: Central air conditioning only.
7 Multi-stage heat pump: Heat pump with backup or auxiliary heating.
8 Conventional multi-stage system: 2 heat stages (wires on W and W2),
2 cooling stages (wires on Y and Y2).
9 Conventional multi-stage system: 2 heat stages (wires on W and W2),
1 cooling stage (wire on Y).
10 Conventional multi-stage system: 1 heat stage (wire on W), 2 cooling
stages (wires on Y and Y2).
System setup