Smooth Setback Recovery (Ssr); Ssr Rules - Lennox iComfort Wi-Fi Setup Manual

Touch screen programmable communicating thermostat
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Smooth Setback Recovery (SSR)

SSR is an algorithm designed to "smoothly" reach a occupied
program schedule set point. The algorithm looks 2 hours
ahead for the occupied program schedule period's set point. If
the occupied set point requires the system to turn on (present
temperature below the heat set point or above the cool set
point), then SSR will calculate a new set point. Once initiated,
SSR monitors the change in room temperature and calculates
a new set point every 30 seconds. Then SSR provides this
new set point for the heating and cooling algorithms; the new
set point will be displayed on the User Interface.

SSR RULES :

1. SSR is enabled when "Smooth Setback Recovery" is set
to enabled and the program schedule is turned on.
2. When SSR is enabled, then it will check for a new set point
every 30 seconds.
3. The SSR Target Program Schedule set point is always 2
hours ahead.
4. When SSR starts, then the Current SSR set point will
equal the current program schedule set point.
5. When a new program schedule period starts, then the
New SSR set point will equal the new program schedule
®
iComfort Wi-Fi
period's set point, unless there are two or more program
periods within the 2 hour window. In this case, SSR will
track the highest heat set point or the lowest cool set point
found in the 2 hour window.
6. SSR will NOT run during a program schedule HOLD.
7. SSR does NOT look at the current temperature.
8. If the target program heat set point is lower than the
Current SSR heat set point, then the New SSR Heat Set
point will equal the Current SSR Set point.
9. If the target program cool set point is higher than the
Current SSR cool set point, then the New SSR Cool Set
point will equal the Current SSR Set point.
10. The New SSR Set point will be displayed on the User
Interface.
11. SSR does NOT control the equipment.
12. SSR does NOT turn off Stage Delay Timers.
13. SSR does NOT round the newly rounded set point, but the
set point shown on the user interface is rounded.
14. SSR will NOT change the Temperature Dead band.
15. SSR will not adjust a set point to violate the Temperature
Dead band.
16. SSR will not overshoot the Target Set point.
7-Day Programmable Communicating Thermostat
Page 31

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