4
4.2 Setting Temperature Differentials
Setting First Stage Differential
NOTE: The first and second stage differential settings are the same for both the
heating and cooling systems.
NOTE: If you do not desire to change the second stage differential setting, you can
press the and buttons at the same time twice to proceed to the Residual Cooling
Fan setting–see step 4.3.
The default settings for the first and second stage differentials and residual cooling fan delay
settings are compatible with most systems and applications. This is normally set at time of
installation and usually does not require any modification under normal operating conditions.
If you feel that the first or second stage of your system is turning on too often, or you wish to
change the fan delay settings, simply follow the instructions below.
2. Press the or button to set the first stage
differential to your desired setting of .5˚, 1˚, or 2˚ F (0.25˚, .5˚, or 1˚ C).
The default setting is .5˚ F (0.25˚ C). The room temperature must change .5˚ F (0.25˚ C) from
the set point temperature before the thermostat will initiate the system in heating or cooling.
1.
In normal operating mode, press and hold the
and buttons at the same time for 4 seconds.
LCD display will show "SET D1 X˚", where "X"
equals the ˚F / ˚C differential setting. This is the
current first stage differential setting.
Setting Second Stage Differential
4.
Press the or button to set the second stage differential to your desired setting of 2˚,
3˚, 4˚, 5˚, or 6˚ F (1.0˚, 1.5˚, 2.0˚, 2.5˚, or 3.0˚ C).
Setting Residual Cooling Fan Feature
PROGRAMMING
USER SETTINGS
4cont.
The default setting is 2˚ F (1.0˚ C). This means that the
room temperature must change 2˚ F (1.0˚ C) in addition
to the first stage differential setting before the
thermostat will initiate the second stage of the system
in heating or cooling.
3.
Press the and button at the same time again
and the LCD display will show "SET D2 X˚", where "X"
equals the ˚F / ˚C differential setting. This is the current second stage differential setting.
1.
Press the and buttons at the same time again
and the LCD display will show "SET FAN XX", where
"XX" equals the fan delay time in seconds during
the cooling mode of operation.
2.
Press the or button to set the residual cooling
fan delay to your desired setting of 0 (disabled), 30,
60, or 90 seconds.
3.
Press the and buttons at the same time again to set the Recirculating Fan off
cycle or wait 5 seconds and the thermostat will automatically return to normal
operating mode.
The default setting is 60 seconds. During the COOL mode of normal operation the fan will
stay on for 60 seconds after the cooling system has satisfied the set point temperature and
has turned off the compressor. This allows the system to provide higher efficiency during
cooling operation.
4.3
5.2 Changing Set Temperature
1. Press and hold or button for 3 seconds. The
entire display will flash once and the SET TEMP
indicator will be flashing. Release the or button
and press the or button again as desired
to adjust the set temperature.
2. The display will return to normal operating mode
after 5 seconds.
3. The TEMP indicator will be showing in the display
indicating that the current temperature shown in
the display is the room temperature.
5
5.1 Review Set Temperature
ADDITIONAL
OPERATION FEATURES
5
Setting the Recirculating Fan Cycle (Also see section 5.3)
PROGRAMMING
USER SETTINGS
4cont.
The default is 120 minutes.
1. The display will show "SET OC XXX", where XXX
is the maximum interval of time (in minutes) that
the fan will remain off if the Recirculating Fan
Mode is selected.
2. Press the or button to change the
Recirculating Fan off cycle (120, 60, or 40 minutes).
3. Press both the and buttons at the same time again to return to the normal
operating mode, or wait 5 seconds for the thermostat to return to the normal
mode automatically.
NOTE:
To erase all user program settings, gently press the RESET button using a
paper clip or a small pencil tip. This will return all thermostat settings to their default
values, and erase all user program settings entered by the user.
1. Press and hold the or button. The current
set point temperature will be displayed in the
place of the current room temperature, and the
indicator SET TEMP will be displayed.
2. The display will return to normal operating mode
when the or button is released. Continuing
to hold the or button for 3 seconds or longer will allow the user to change the
current set point temperature (See Changing Set Temperature).
4.4