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T6811DP08/T6812DP08 DIGITAL THERMOSTAT
3 62-0325ES—01
Installer Setup
1. Press and hold UP and MODE buttons simultaneously
for 3 seconds to enter the Installer Setup mode.
2. Press UP or DOWN button to change settings.
3. Press MODE button to advance to the next function.
4. Press and hold UP and MODE buttons simultaneously
for 3 seconds to exit and save settings.
Installer Test
1. Press and hold UP and DOWN buttons simultaneously
for 3 seconds to enter the Installer Test mode.
2. Press UP or DOWN button to change settings.
3. Press MODE button to advance to the next function.
4. Press and hold UP and MODE buttons simultaneously
for 3 seconds to exit and save settings.
Operating Your Thermostat
1. Power On/Off
Slide the POWER switch thermostat will enter the On/Off
mode.
2. Fan Switch
Slide the FAN switch to select Fan mode Low, Med,
High.
3. System Mode Setting
Press the MODE button to choose Heat, Cool or
Vent. In ventilation mode, only the fan will operate.
4. Temperature Setting
In Heat/Cool mode, press the or (UP or DOWN button)
to select the desired temperature setting.
No. Description Possible Options
1 System Type 0 Heat only
1 Cool only
2 Two pipes 1H1C manual
(Default)
9 Temperature Scale 0 °F
0 °C (Default)
13 CPH value For Heat 1–12
4 (Default)
14 CPH value For Cool 1–6
3 (Default)
18 Display Temperature
adjustment
-2°C (-4°F)
-1.5°C (-3°F)
-1°C (-2°F)
-0.5°C (-1°F)
0°C (0°F) (Default)
0.5°C (1°F)
1°C (2°F)
1.5°C (3°F)
2°C (4°F)
19 Temperature Display
mode
0 Display Room
Temperature (Default)
1 Display Setpoint
20 Heating Range Stops 10–32°C Default 32°C
(50–90°F) Default 90°F
21 Cooling Range Stops 10–32°C Default 10°C
(50–90°F) Default 50°F
22 Keypad Lockout 0 All keys available (Default)
1 All keys locked out
No. Description Possible Options
10 Installer Test Heat 0 Heat Off
1 Heat On
30 Installer Test Cool 0 Cool Off
1 Cool On
70 Press UP button to see software info (71, 72 & 73)
71 Software version (Major)
72 Software version (Minor)
73 Identification code
Table 1. Troubleshoting Tips.
If... Then...
Heating
system does
not turn on
• Set the mode to Heat by pressing the
Mode button.
• Check that the heat temperature setting is
above the room temperature.
• Check heating on icon shows solidly in
the display.
• Wait five mintues for the heating system
to respond.
Cooling
system does
not turn on.
• Set the mode to Cool by pressing the
Mode button.
• Check that the cool temperature setting is
below the room temperature.
• Check cooling on icon shows solidly in
the display.
• Wait five mintues for the cooling system to
respond.
The Mode
button doesn’t
work.
• Check whether the keypad is locked or
not.
• Check whether the thermostat is off.
The Up or
Down button
doesn’t work.
• Check whether the keypad is locked or
not.
• Check whether the system is working
Ventilation mode.
• Check whether the thermostat is off.