Lennox iComfort S30 Installation And Setup Manual page 29

Parameter Description
When enabled, smooth set back begins recovery up to two hours before the programmed time so that the programmed temperature is reached at the corresponding
programmed event time. Assume 12°F (6.72°C) per hour for first-stage gas/electric heating and 6°F (3.36°C) per hour for first-stage compressor based heating or cooling.
With Smooth Set Back disabled, the system will start a recovery at the programmed time. Options are enabled or disabled. Default is enabled.
The SSR set point calculation is as follows:
Smooth Setback
Recovery (SSR)
Rules for SSR:
• SSR is enabled when both "Smooth Setback Recovery" is set to enabled (default) and the program schedule is turned on.
• SSR does NOT turn off stage delay timers.
• SSR will NOT change the dead band between heating and cooling modes.
• SSR will not overshoot the target set point.
• SSR will reset if the user updates the program schedule during the active SSR period
Enabled (default) setting: When enabled all stage delay timers (stages 2 through 6) are enabled and will serve to bring on additional stage(s) of cooling or heating on a
timed basis (default 20 minutes)
Stage Delay
Timers
Disabled setting: All stages delay timers are disabled. Heat/cool stages are changed based on temperature
(First)
NOTE: The second-stage delay timer (when stage timers is Enabled) is used for both HEATING and COOLING. However, if the system has a variable capacity furnace,
zoning or variable outdoor unit, all stage delay timer will be ignored.
Stage Delay
Second through Sixth Stage Delay timer (where applicable) - If staged delay timers are "Enabled", the default is 20 minutes but can be programmed from 5 to 120
Timers
minutes in 5-minute increments. If the first stage fails to advance the ambient temperature toward the set point by 1.0°F (0.56°C) in the programmed delay time, then the
second stage is activated. However, if the system has a variable capacity furnace,
(1 through 6)
Number of stages in thermostat is dependent on equipment that is installed.
Stage
Differentials
NOTE: Lennox variable capacity systems will stage electric heat but not on differentials. It will use the thermostat PI logic to stage the electric heat. If the system has a
(1 through 6)
variable capacity furnace or zoning all stage differentials will be ignored.
Range is -5.0 to 5.0°F (-2.78 to -2.78°C). Default is 0.0°F (-0.0°C).
Temp Reading
If it is determine that the actual temperature being detected at the thermostat is off based on independent readings using other ambient temperature reading devices, the
Calibration
display can be adjusted using this setting.
The Feels-Like feature factors in the outdoor temperature and indoor humidity for a more accurate control of the temperature in the home. Either an outdoor temperature
sensor is used or Internet Weather is enabled for this feature to operate. Modifying this setting here will also change the feature status on the user settings screen.
• Normal - This setting cools or heats the home to the desired temperature setting (Feels Like is OFF.
Temperature
Control Mode
Comfort - This setting cools or heats the home to the desired temperature setting (Feels Like) is ON. When set to ON, other parameters are modified to optimal settings
•
for this feature. Those setting changes will be listed on-screen when Comfort is enabled.
Default is Normal.
Wall Insulation Options are poor, average and good. Default is average.
Table 4. Smart Hub Parameters
For
New
Current Program CSP
Current
−
SSR
SSR CSP
CSP
For
New Target Program HSP
Current
−
SSR
SSR HSP
HSP
Where: CSP = Cool Set Point
HSP = Heat Set Point
N = number of 30 second intervals to the target program set
point
Note: N = 240 when target program set point is 2 hours away
(maximum recovery time)
29
−
Target Program CSP
N
−
Current Program HSP
N