Honeywell T6811DP08, T6812DP08 Owner's Manual

62-0325ES-01

T6811DP08/T6812DP08 Digital Thermostat

CAUTION

INSTALLATION INSTRUCTIONS

INSTALLATION GUIDE

DOWN BUTTON

FAN SWITCH

Display

KEYPAD LOCK

INDICATES THE SETPOINT

INDICATES THE TEMPERATURE

CURRENT MODE

INDICATES THE INSTALLER SETUP

INDICATES THE INSTALLER TEST

UP BUTTON

MODE BUTTON

POWER SWITCH

INDICATES THE NUMBER OF SETUP OR TEST

Lock

Setup

Set to

INDICATES TEMPERATURE IS “CALLING” FOR HEAT OR COOL

Test

MCR29502

M29503

Electrical Hazard. Can cause electrical shock or equipment damage.

Disconnect power before installation.

Terminal Designations

Terminal Designation

L Line Voltage Power

Ch/Cc Heating close/Cooling close

W/Y Heating open/Cooling open

N Line Voltage Ground

Gl Low speed fan

Gm Medium speed fan

Gh High speed fan

Wiring Diagrams

Ch/Cc

W/Y

VALV E

FAN

M29504

Fig. 1. Typical wiring for ON/OFF control in 2 pipes Heat/

Cool/1H1C (for 2-wire valve actuators).

T6811DP08/T6812DP08 DIGITAL THERMOSTAT

FAN

VALV E

Ch/Cc

W/Y

M29505

M29506

Fig. 3. Wiring thermostat.

Fig. 2. Typical wiring for ON/OFF control in 2 pipes Heat/

Cool/1H1C (for 3-wire valve actuators).

Installation

1. Pull the wires through the wire hole on the wallplate and

place the back cover over the junction box.

2. Insert the mounting screws and tighten. See Fig. 3, left.

3. Loosen screw terminals used for the application. Insert

the wires into the terminal block and tighten each screw terminal. See Fig. 3, right.

4. Align the top of the thermostat with the back cover and

push down on the back cover. See Fig. 4, left.

5. Insert the locking screw into the whole on the bottom of

the thermostat and tighten. See Fig. 4, right.

M29507

Fig. 4. Installing thermostat.

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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.

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

19 Temperature Display

mode

20 Heating Range Stops 10–32°C Default 32°C

21 Cooling Range Stops 10–32°C Default 10°C

22 Keypad Lockout 0 All keys available (Default)

-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)

0 Display Room Temperature (Default)

1 Display Setpoint

(50–90°F) Default 90°F

(50–90°F) Default 50°F

1 All keys locked out

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.

T6811DP08/T6812DP08 DIGITAL THERMOSTAT

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

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.

Table 1. Troubleshoting Tips.

If... Then...

Heating system does not turn on

Cooling system does not turn on.

The Mode button doesn’t work.

The Up or Down button doesn’t work.

• 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.

• 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.

• Check whether the keypad is locked or

not.

• Check whether the thermostat is off.

• Check whether the keypad is locked or

not.

• Check whether the system is working

Ventilation mode.

• Check whether the thermostat is off.

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