Honeywell RTH8500 - Page 22

Installation Guide
20
About your new thermostatSystem setup
Heating cycle rate
Function
0240
Press s/t to select your heating system:
Options: 5 Gas or oil furnace: Use this setting if you have a standard gas or oil furnace
that is less than 90% efficient.
9 Electric furnace: Use this setting if you have an electric heating system.
3 Hot water or high-efficiency furnace: Use this setting if you have a hot
water system or a gas furnace of greater than 90% efficiency.
1 Gas/oil steam or gravity system: Use this setting if you have a steam or
gravity heat system.
Emergency heat cycle rate (heat pumps only)
Function
0270
Press s/t to select your heating system:
Options: 9 Electric furnace: Electric heating systems.
5 Gas or oil furnace: Standard gas/oil furnace (less than 90% efficiency).
3 Hot water or high-efficiency furnace: Hot water system or gas furnace
(more than 90% efficiency).
1 Gas/oil steam or gravity system: Steam or gravity heat systems.