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TH146-P-U 400-280-010-B 5/24/07 11/12
Manual Adjustment
The humidity level is set by the user (5 to 60%).
n Press the Hum button until MAN appears on the screen.
o Press one of the buttons to adjust the humidity level.
p Press the button.
Automatic Adjustment
The humidity level is set by the controller based on the outdoor tem-
perature to prevent ice formation or condensation on the windows
while providing enough humidity for your comfort. However, the user
can apply an offset (-9 to 9%). For example, the user can enter a
negative offset if there is ice formation or condensation on the win-
dows.
n Press the Hum button until AUTO appears on the screen. The
humidity level set by the controller is also displayed.
o Press one of the buttons to enter or change the offset.
p Press the button.
Off
To turn off the humidity control:
n Press the Hum button until OFF appears on the screen.
o Press the button to save and exit the programming.
If an air exchanger is connected to the controller, it can be used in
either of the following modes:
• Humidity control mode (see section 7.2)
• Air exchange mode (see below).
In air exchange mode, the air exchanger is activated to circulate air
between indoors and outdoors regardless of the indoor humidity
level). To activate the air exchange mode:
n Press the Hum button until AIR appears on the screen.
o Set the duration you want the air exchanger to operate using
the buttons. Select 10 - 90 minutes for a specific duration
or On for an indefinite length of time.
p Press the button.
To deactivate the air exchange mode:
n Press the Hum button until one of the following appears on the
screen.
AUTO: The air exchanger is in humidity control mode (auto-
matic adjustment).
MAN: The air exchanger is in humidity control mode (manual
adjustment).
OFF: The air exchanger is Off.
o Press the button to return to normal display.
If the controller is configured for a minimum air exchange time every
hour and that minimum has not already been attained by the end of
the hour, the air exchanger will be activated regardless of the indoor
humidity level (see page 8, item 19). Let’s say the minimum time is
set to 10 minutes. If the air exchanger has operated for 7 minutes
during a particular hour, it will automatically be activated for another
3 minutes by the end of that hour.
CT280-3H3C CONTROL MODULE
Power supply: 24 VAC
Current consumption: 150 mA
Maximum load per output: 1 A @ 24 VAC
Short cycle protection: 2 minutes
Control cycles: 2 to 6 per hour
Operating temperature: 0°C to 50°C (32°F to 122°F)
Storage temperature: -20°C to 50°C (-4°F to 122°F)
Humidity conditions: 0 to 95%, non-condensing
Dimensions: 95 x 137 x 30 (3.8 x 5.4 x 1.2 in.)
TH146-P USER CONSOLE
Temperature setpoint range
Heating mode: 5°C to 30°C (40°F to 86°F)
Cooling mode: 15°C to 40°C (59°F to 104°F)
Humidity setpoint range: 5 to 60%
Indoor temperature display range: 0°C to 70°C (32°F to 158°F)
Outdoor temp. display range: -50°C to 70°C (-58°F to 158°F)
Temperature display resolution: 0.5°C (1°F)
Program protection: non-volatile memory
Operating temperature: 0°C to 50°C (32°F to 122°F)
Storage temperature: -20°C to 50°C (-4°F to 122°F)
Humidity conditions: 0 to 95%, non-condensing
Dimensions: 79 x 79 x 24 mm (3.1 x 3.1 x 1 in.)
7. Humidity Setting
7.1
Display
7.2
Humidity Adjustment
8. Air Exchange Duration Setting
8.1
Manual Activation
Humidifier is On
Dehumidifier is On
Appears when the
humidity setpoint
is displayed
Humidity control mode
(auto, manual, off or
air exchange)
Humidity level
Appears when
dehumidification is
disabled because the
outdoor temperature
is too high
8.2
Manual Deactivation
8.3
Minimum Air Exchange Time
9. Technical Specifications
400-280-010-B (TH146-P-U) ENG.fm Page 11 Thursday, May 24, 2007 4:28 PM