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TH146-N-DE
User’s Guide
Non-programmable Heat Pump Controller
TH146-N-DE 400-280-000-G 9/22/06 7/8
Press MODE to place the controller in one of the following modes.
Press the button to select the fan operating mode.
• In automatic mode, the fan runs only when heating or cooling is
activated.
• In continuous mode, the fan runs continuously and the sym-
bol is displayed. NOTE: If the “smart fan” feature is enabled,
the fan will run only when heating or cooling will be activated
during unoccupied mode.
Depending on how the controller has been configured (see page 4,
item 9), it displays either the measured indoor humidity level or the
measured outdoor temperature.
The actual (measured) temperature is normally displayed. To view
the temperature setpoint, press one of the buttons once. The
setpoint is displayed for 5 seconds and is indicated by the sym-
bol.
To modify the temperature setpoint, press one of the buttons
until the desired temperature is displayed.
NOTE: If the controller is in automatic heat/cool changeover, the
setpoint is automatically reduced or raised by 1°C (2°F) when the
controller switches to heating mode or to cooling mode respectively.
For example, if you place the setpoint at 24°C (75°F) while in heat-
ing mode, the setpoint will become 25°C (77°F) in cooling mode and
will return to 24°C (75°F) when the controller switches back to heat-
ing mode.
The humidity adjustment can be placed in manual mode or in auto-
matic mode (see page 4, item 11).
Manual Adjustment
In manual mode, the user sets the humidity level (5% to 60%).
Automatic Adjustment
In automatic mode, the controller sets the humidity level based on
the outdoor temperature to prevent ice formation or condensation
on windows. However, the user can apply an offset (-9% to 9%). For
example, the user can enter a negative offset if there is too much
condensation on the windows.
Procedure
The procedure to set the humidity level (in manual mode) or the off-
set (in automatic mode) is as follows:
1) Press the Mode button for 3 seconds.
One of the following displays appears:
System fault
Temperature adjustment
Fan operating
mode selection
System operating
mode selection
System
operating mode
Fan is in continuous mode
Unoccupied
mode is On
Outdoor
temperature or
indoor humidity
Indoor temperature
Auxiliary heat is On
Heating is On
Cooling is On
Emergency heat
mode
Dual-energy
mode
Humidifier
is On
Appears when the
temperature setpoint
is displayed
5. Operation
5.1
System Operating Mode (Heating/Cooling)
HEAT The system is in heating mode.
COOL The system is in cooling mode.
AUTO
The system is in automatic changeover. (The system
switches between heating mode and cooling mode to main-
tain the desired temperature.)
OFF Both heating or cooling are off.
EHEAT
The system is in emergency heat mode. Only auxiliary heat-
ing is used when there is a call for heat.
5.2
Fan Operating Mode (On/Auto)
5.3
Indoor Humidity / Outdoor Temperature Display
Outdoor
temperature
Indoor
humidity
5.4
Temperature Adjustment
5.5
Humidity Adjustment