Honeywell RTH8580ZW - Heating, Fan, and Changeover Settings

33-00131ES—01 18
System setup
Function Settings & Options
0280
Backlight
0 Backlight off, then on for approximately 45 seconds after keypress.
1 Backlight always on low intensity, full bright after keypress (requires
24VAC connection).
0300
Manual/Auto
Changeover
See page 16 for
more information.
0 Manual changeover (Heat/Cool/Off).
1 Automatic changeover (Heat/Cool/Auto/Off). Automatically turns on Heat
or Cool based on room temperature.
0310
Auto changeover
deadband
3 Heat/cool temperature 3°F apart (1.5°C)
[Other options: 2-9 (2°F to 9°F/1°C to 5°C)])
0320
Temperature
Format (°F/°C)
0 Fahrenheit
1 Celsius
0330
Automatic Daylight
Saving Time
Adjustment
0 Off
1 On
What other functions can I change? (See page 16 for instructions.)
Function Settings & Options
Note: Depending on system settings, functions on this page might not appear.
0180
Heating Fan
Control
0 Gas or oil heat: Use this setting if you have a gas or oil heating system
(system controls fan operation).
1 Electric heat: Use this setting if you have an electric heating system
(thermostat controls fan operation).
0190
Heat Pump
Changeover Valve
(for heat pumps
only)
0 Cooling changeover valve: Use this setting if you connected a wire
labeled “O” to the O/B terminal.
1 Heating changeover valve: Use this setting if you connected a wire
labeled “B” to the O/B terminal.
0220
1st Stage
compressor cycle
rate
3 Recommended for most compressors
[Other options: 1, 2, 4, 5 or 6 CPH]
0230
2nd Stage
compressor cycle
rate
3 Recommended for most compressors
[Other options: 1, 2, 4, 5 or 6 CPH]
0240
Heating Cycle
Rate
5 Gas or oil furnace: Standard gas/oil furnace (less than 90% efficiency).
9 Electric furnace: Electric heating systems.
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.
[Other options: 2, 4, 6, 7, 8, 10, 11, 12 CPH]
0250
Heating Cycle
Rate Stage 2
0260
Heating Cycle
Rate Stage 3
0270
Emergency Heat
Cycle Rate (CPH)
How do I customize my heating/cooling system? (See page 16 for instructions.)