Temporary Temp. Change Pause The Schedule; Remote Outdoor Sensor - Lennox ComfortSense L7742U Programming Manual

H/C
Stages
Locked =
NO
4th stage
ON
H/C
Stages
Locked =
YES
4th stage
ON
SET-
POINTS: SP −3.5
Figure 14. Heating − dual fuel − 4 stage (2 compressor / 2 backup)
Temporary Temperature Change Pause
the Schedule
Two types of temperature changes may be made: tempo-
rary (while in the SCHEDule ON mode) or permanent
(while in SCHEDule OFF).
NOTE − If autochangeover is enabled at the time a
temperature hold is invoked, the thermostat MAY
CHANGE OVER from heating to cooling and vice versa, to
maintain the temperature
autochangeover deadband (minimum separation between
the heat and cool set points) is still used to determine
whether changeover occurs. This applies to all of the
following hold modes.
Temporary Temperature Changes (schedule
ON)
While the system is running with the schedule ON, any
change to the temperature settings may be made for the
default time (approximately 3 hours) or for as long or short
a time as you wish. Therefore, following the procedure will
set a HOLD on the schedule for a few hours or for up to 45
days. Figure 15 shows a typical screen set in the AUTO-
changeover mode. If the SYSTEM were set in HEAT,
COOL, or EM HEAT mode, only one set of arrows would
appear near the top.
1. On the home screen, press the UP or DOWN arrow to
adjust to the desired temperature.
2. A set of arrows appears to the right of the information
display; use these arrows to adjust the hold period for
as long as desired, or, if not changed, this setting will
hold for approximately 3 hours.
3. Press SAVE.
4. After saving, ON in the SCHED field flashes, and the
information display alternates between the following:
HOLD SETTING UNTIL
WKD MMM DD HH:MMMM
and
PRESS SCHED TO
RESUME PROGRAM
5. After the 3 hours expires, the scheduled programming
will resume, OR, press SCHED to cancel the hold.
506180−01 09/08
3rd stage
ON
Stg3 Differential
Stg4 Differential
3rd stage
ON
Stg3 Differential
Stg4 Diff.
SP −3.0 SP −2.5 SP −2.0
hold setpoint.
1st stage
ON
2nd stage
ON
Stg2 Differential
1st stage
ON
2nd stage
ON
Stg2 Differential
SP −1.5 SP −1.0 SP −0.5
Permanent Temperature Changes (schedule
OFF − non−programmable operation)
To make a change for an undefined time span, the sched-
ule must be turned OFF. The setpoint is maintained indefi-
nitely.
1. From the home screen, press SCHED to turn the
scheduled programming OFF.
2. Press the UP or DOWN arrow to set the temperature
to the desired temperature.
The information display field continues to display the active
The
mode, outdoor temperature, indoor relative humidity.
Turning the schedule back ON (press SCHED box on
home screen) will cancel a permanent hold and return to
the event-programmed mode.
Figure 15. Setting a Hold on the Schedule
Optional Remote Outdoor Sensor
The outdoor sensor (X2658) may be required, especially
when using Humiditrol® EDA applications. In addition to
measuring and displaying outdoor temperature, the out-
door sensor provides dew point adjustment and control for
all models. If used with this thermostat, the sensor enables
optimal heating equipment operation via programmable
balance points. The screen will display NO OUTDOOR
SENSOR until the outdoor sensor is installed, the feature
is turned on in the installer setup, and if the user turns it on
in the DISPLAY INFO option in user setup. The outdoor
temperature is displayed in the information display (lower
center of the screen).
NOTE − For proper operation of Humiditrol
tions, the outdoor sensor MUST be installed.
Page 16
1st stage
OFF
Stg1 Differential
2nd stage
OFF
3rd stage
OFF
4th stage
OFF
1st stage
OFF
Stg1 Differential
2nd stage
OFF
3rd stage
OFF
4th stage
OFF
SP SP +0.5
HOLD SETTING UNTIL
10:49AM OCT 10
®
EDA applica-