Mechanical design
Thermostat appearnce
DIGITALDISPLAY
FANBUTTON
POWERBUTTON
MODEBUTTON
UPBUTTON
DOWNBUTTON
LCD display
INDICATESROOMTEMPERATURE
INDICATESTHERMOSTAT ISOFF
CURRENTMODESETTING
INDICATESTHEKEYPAD
ISENTIRELYORPARTLY
LOCKED
INDICATESTHERMOSTAT IS
INFREEZINGPROTECTIONMODE
INDICATESWHETHER
THERMOSTAT IS IN
OCCUPIEDORNOT
INDICATESTHERMOSTAT IS
"CALLING" FORHEATORCOOL
INDICATESTHESETPOINT
INDICATES INSTALLERTEST
INDICATES INSTALLERSETUP
CURRENTFANSETTING
PRESS THE MODE BUTTON TO SELECT
HEAT, COOLORVENT
FanOperation
PRESSTHEFANBUTTONTOSELECTLOW, MED, HIGHORAUTO
Fan can be selected as manual or automatic
3-speed operation. In Manual mode, the fan
is switched to the selected speed via control
output Gh, Gm, Gl. While in automatic mode, fan
speed depends on the difference between room
temperature and setpoint. When room temperature
reaches setpoint, valve will be closed and
meanwhile, fanwill be closed either.
Temperaturedisplay
The displayed temperature can be set to acquired
room temperature or setpoint. The setting can be
made during Installer Set-Up process.
Cycleper hour (CPH)
In order to get amore accurate temperature control,
CPH function may enable the thermostat to open
the valve for several times per hour even the
temperature is close to setpoint (difference less
than ½ P-band). The default value is 4 for heating
and 3 for cooling and can be changed in Installer
Set-Up process.
Remote temperature sensor
T6800 provides control either depending on the
acquired room temperature or depends on the
return air temperature. The model of remote
temperature sensor is (NTC20K).
Keypad lock
Keypad lock can be set in ISU with default status
is all keys available. You may change into mode
button lockedout, Fanandmodebuttons lockedout
andAll buttons locked out by changing the ISU.
Function
Valve control
Thermostat acquires the room temperature via its
integrated sensor or external temperature sensor
andmaintains the setpoint by delivering on/off valve
control commands output.
APH07CH04
-
R2000EN
-4F
-2F
2F
4F
COOL
HEAT
Fan speed ramping control algorithm
Fan speed is highor off
Fan speed ismediumor off
Fan speed is lowor off
Fan speed is lowor off
Fan speed ismediumor off
Fan speed is highor off
Setpoint
Difference betweenRTandSP
