© 2008 D 540e - 02/08 2 of 12
Table of Contents
Table of Contents ........................................................2
Display and Switch Settings .......................................2
Switch Settings ...................................................2
Display and Symbols Description........................3
Button Operation .................................................4
Setting the Temperature ......................................4
Display Settings ..........................................................5
User Settings .....................................................5
Adjust Menu For installer use only ......................6
Sequence of Operation ..............................................7
Heating Operation ..............................................7
Cooling Operation ..............................................7
Fan Operation ....................................................7
Outdoor Temperature Display .............................8
Schedules ..........................................................8
Optimum Start ....................................................8
Scenes ...............................................................8
Cool Group Master ..............................................9
Backlight .............................................................9
Warm Weather Shutdown ..................................9
Freeze Protection ...............................................9
Cycles Per Hour .................................................9
Synchronization .................................................9
Indoor Temperature Feedback ......................... 10
System Pump ...................................................10
Exercising ......................................................... 10
Zone Test .........................................................10
Max Heat ..........................................................10
Flushing ........................................................... 10
tN4 Address ..................................................... 10
Error Messages ........................................................ 11
Cleaning the Thermostat ......................................... 12
Warranty ................................................................... 12
Display and Switch Settings
Switch Settings
12 34
tNt 540e
540e
1001-07
Switch Position Action
1
ON
Setback
The thermostat follows a
programmable setback
schedule as a schedule
member if available.
OFF
OFF
The thermostat does not follow
a programmable setback
schedule.
2
ON
Scene
The thermostat responds to
changes in the scene (system
wide manual overrides).
OFF
OFF
The thermostat does not
respond to scenes.
3
ON
None
The thermostat is not part of a
cooling group.
OFF
Cool Master 1
The thermostat is a master of
cooling group number 1.
4
ON
Hydronic
Hydronic heat source.
OFF
Other
Other heat source (Furnace,
Electric).
*Read the Sequence of Operation for detailed information on
each of the switch setting features.