TEC22x6(H)-4 and TEC22x6H-4+PIR Series LONWORKS® Network Thermostat Controllers with
Dehumidification Capability, Fan Control, and Occupancy Sensing Capability Installation Instructions
8
• °C/°F key (hospitality models) changes the
temperature scale to either Celsius or Fahrenheit
and allows access to the Installer Configuration
Menu. See the Configuring the TEC22x6(H)-4 and
TEC22x6H-4+PIR Series Thermostat Controllers
section.
Note: For hospitality models, binary inputs can
override the unoccupied mode to occupied mode.
• UP/DOWN arrow keys change the configuration
parameters and activate a setpoint adjustment.
Backlit Liquid Crystal Display (LCD)
The TEC22x6(H)-4 and TEC22x6H-4+PIR Series
Thermostats include a 2-line, 8-character backlit
display. Low-level backlighting is present during normal
operation, and it brightens when any user interface key
is pressed. The backlight returns to low level when the
thermostat is left unattended for 45 seconds.
Light-Emitting Diodes (LEDs)
Three LEDs are included to indicate the fan status, call
for heat, or call for cooling:
• The fan LED is on when the fan is on.
• The heat LED is on when heating is on.
• The cool LED is on when cooling is on.
Integrated PIR Sensor –
TEC22x6H-4+PIR Series Thermostat
Controllers
The integrated PIR sensor allows for automatic
switching between fully adjustable Occupied and
Stand-By temperature setpoints without user
interaction. This feature generates incremental energy
savings during scheduled occupied periods while the
space is unoccupied.
Status Display Menu
The Status Display Menu is displayed during normal
thermostat operation. This menu continuously scrolls
through the following parameters:
• Room Temperature (All Models) and Humidity
(TEC2236-4, TEC2236H-4, TEC2236H-4+PIR,
TEC2256-4, TEC2256H-4, and TEC2256H-4+PIR
Models)
Note: For models with dehumidification capability,
the default setting is no humidity reading on the
display (%RH disp parameter is set to off.) The
%RH disp parameter must be set to on to display
the current humidity reading.
• System Mode
• Occupancy Status
(Occupied/Unoccupied/Override)
• Applicable Alarms (The backlight lights up as an
alarm condition is displayed.)
Note: An option is available within the Installer
Configuration Menu to lock out the scrolling display and
show only the Room Temperature parameter.
Status LED
The status LED shows the operational status of the
thermostat. The Status LED is a small green light under
the thermostat cover (under the L
ONWORKS daughter
board on the left edge when facing the thermostat).
Dehumidification Operation – TEC2236(H)-4
and TEC2256(H)-4 Models Only)
Upon detection of space humidity above the adjustable
humidity setpoint as sensed by the internal humidity
sensor, dehumidification activates.
Note: Dehumidification operates only in Cooling
mode. Dehumidification does not operate in Off or
Heating system mode.
Note: A central network command can globally lock
out dehumidification to all thermostats.
If the room temperature resides in the deadband
between the Cooling and Heating Setpoint:
• the thermostat forces the fan to low speed
• the chilled water valve opens to the specified
maximum value set by CoolMax
• the thermostat stages heating to maintain space
temperature at the cooling setpoint as sensed by
the thermostat
If the room temperature falls below the current heating
setpoint, the thermostat disables dehumidification.
Table 2: Status LED Explanation
Status LED
Condition
Explanation
Continuously
On
The thermostat does not have an
application loaded in its memory.
Flashing at a
0.5 Hz rate
The thermostat has an application
loaded in its memory but is not
configured. Use a LONWORKS network
management tool to bind the thermostat
to a LONWORKS network.
Continuously
Off
The thermostat has an application
loaded in its memory and is bound to a
L
ONWORKS network.
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