Active Brightness; Idle Brightness; Night Dimmer - Johnson Controls T9580 Owner's Manual And Installation Instructions

Main Menu Buttons -
Display

Active Brightness

You may select how bright the backlight is while the thermostat is active.
The display is active for 3 minutes after last touch, it then goes Idle.

Idle Brightness

You may select how bright the backlight is while the thermostat is idle.

Night Dimmer

You may dim the brightness of the screen at night.
Auto Night Dimmer - OFF
The screen can be set to dim automatically at night.
Dimming the display can prolong the life of the backlight.
Set Idle Brightness
Set the screen brightness for the Night Dimmer. When Night Dimmer
is On, the display will go idle 8 seconds after last touch.
Set Dimmer Schedule
Set the schedule for the Night Dimmer.
Display
The display brightness options
may be adjusted in this menu.
(20%)
23
(80%)
(30%)