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Overview
RS485 Thermostat
The TR65 thermostat provides typical thermostat control of a central heating and cooling HVAC system
plus has the added feature of RS485 communications for remote control. The TR65 is a two part
thermostat with a Wall Display Unit and a HVAC Control Unit.
The Wall Display Unit (WDU) has a large, backlit graphical display, control buttons, status LEDs and a
temperature sensor. The WDU can display multiple screens for different functions of the thermostat. In
the default thermostat control screen, shown below, it displays the current room temperature, heating and
cooling setpoints, system mode, manual fan mode, time, and status information.
Display operation
Thermostat control screen
Normally the thermostat displays the thermostat control screen as shown above. Using the “Menu”
button, you can access other screens and functions of the thermostat.
Minimized Display Mode
Optionally, you can set the thermostat to show only the temperature in a “minimized” display mode.
This mode can be set on or off in the thermostat “Users Settings” menu.
Backlight
The thermostat has a backlit display for low light and night visibility. It can be set to remain on constantly,
or to turn off after a 20-120 second delay. These are selectable in the User Settings menu.
Function Control Buttons
The thermostats buttons are “Soft Keys” meaning that they change functions when you change screens.
The function of the button is defined by “on-screen labels” that are dynamic and change when you change
screens
Heating (H)
And
Cooling (C)
Setpoints
On-screen
dynamic
button labels
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