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Option 18 -- Backlight C onfiguration
Selections:
ON, OF — Default is OF.
When ON is selected and the thermostat is not battery operated a low level
continuous display backlight is always on. With OF selected, the backlight is only
on for a short time after the door is opened or a key is pressed. Continuous
backlight is not available with battery operation.
Option 21 -- Keypad Lockout
Selections:
ON, OF — Default is OF.
With OF selected, the keypad cannot be locked. With ON selected the keypad will
be locked and can be unlocked by simultaneously pressing the UP and DOWN keys
for 5 seconds. Once unlocked, it will relock 2 minutes after the last keypad press. A
“lock” icon is displayed while it is locked.
Opt ion 24 -- Pr ogrammabl e/ N on--Programmab l e (p rogramm abl e mod el on l y)
Selections:
P, nP — Default is P.
This option is only available on programmable models, allowing programming to
be disabled when nP is selected. The clock is displayed, but the program schedule,
the HOLD and TEMPORARY HOLD functions are disabled.
Opt i on 25 -- Nu mb er of Program m abl e Period s (p rogramm abl e mod el s onl y)
Selections:
2, 4 — Default is 4.
Selecting 2 allows 2 programming periods, P1 and P2, per day. Selecting 4 allows
periods P1, P2 , P3, and P4. Not available with non--programmable thermostats.