T6811/6812 SERIES DIGITAL THERMOSTAT
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Toronto, Ontario M1V 4Z9
www.customer.honeywell.com
® U.S. Registered Trademark
© 2010 Honeywell International Inc.
63-4375ES—02 K.K. Rev. 0
6
-10
Printed in U.S.A.
Mechanical Design
Thermostat Appearance
Fig. 2. Thermostat controls.
Function
Temperature Display
The displayed temperature can be set to room temperature or
setpoint. The setting can be changed during the Installer
Setup process.
Keypad Lockout
Full keypad lockout can be set in the Installer Setup. If keypad
lockout is chosen, all of the keys will be disabled from use.
Ventilation Mode
Press mode button to enter ventilation mode. While in
ventilation mode, there will be no output for the valve but the
fan will support manual fan speed control.
Terminal Designations
Wiring Diagrams
Fig. 3. Typical wiring for ON/OFF control in 2 pipes Heat/
Cool/1H1C (For 2-wire valve actuators).
Fig. 4. Typical wiring for ON/OFF control in 2 pipes Heat/
Cool/1H1C (For 3-wire valve actuators).
DOWN
BUTTON
M29690
FAN
BUTTON
UP
BUTTON
MODE
BUTTON
POWER
BUTTON
Table 2. Terminal designations.
Terminal
Description
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
FAN
VALVE
L
N
L
Ch/Cc
W/Y
N
GI
Gm
Gh
M29504
FAN
VALVE
L
N
L
Ch/Cc
W/Y
N
GI
Gm
Gh
M29505
