506228−01 05/09
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Stage Delay & Differential Settings (Installer settings)
Press OPTIONS tab for the main options screen, then use the arrows to
select INSTALLER SETTINGS. Press ENTER.
INSTALLER SETTINGS
−−−−−−−−−−−−−−−−−−−−
After the first ENTER, the following appears:
MUST BE SET BY
QUALIFIED PERSON
Scroll to STG DELAY TIMERS. The following stage delay and differen-
tial settings are available for modifying. Follow the instructions for each
parameter.
STAGE DELAY AND DIFFERENTIAL SETTINGSThe differential or
delay settings in the Installer Settings menu are:
STG DELAY TIMERS (not on single stage models)
STG 1 DIFF (all models)
STG 2 DIFF(2 stage models)
STG 2 DELAY(not on single stage models OR if timers turned off)
STG 3 DIFF(2−stage heat pumps w/backup heat)
STG 3 DELAY(not on single stage models OR if timers turned off)
STG 4 DIFF(2−stage heat pumps w 2−stages backup heat)
STG 4 DELAY(not on single stage models OR if timers turned off)
H/C STGS LOCKED IN
STG 2 HP LOCK TEMP
STG DELAY TIMERSdefault ON. When ON, all stage delay timers
(stages 2, 3, and 4) are enabled and will serve to bring on additional
stage(s) of cooling or heating on a timed basis (default 20 minutes) in
cases when the previous stage of heating or cooling will not raise or
lower the room temperature to the set point in a given time.
When OFF is selected all stage delay timers are disabled. This means
stages are changed based on the temperature and not their timer de-
lays. Scroll to STG DELAY TIMERS; press ENTER.
STG DELAY TIMERS
DEFAULT (ON) OFF
DIFFERENTIAL SETTINGSThe differentials below and shown in
the figures 6 through 13 are defaults and are adjustable for different sys-
tem setups.
STG 1 DIFFStage 1 differential is used in all thermostats. The default
is 1.0°F but can be programmed between 0.5° and 8.0°F in 0.5°F incre-
ments.
Scroll to STG 1 DIFF; press ENTER. Select the desired differential.
Press SAVE.
STG 1 DIFF
DEFAULT(1.O°F) O.5°F
STG 2 DIFF thru STG 4 DIFF (where applicable)The default is 1.0°F
but can be programmed between 0.5° and 8.0°F in 0.5°F increments.
Scroll to STG 2 DIFF (or 3 or 4); press ENTER. Select the desired differ-
ential. Press SAVE.
STG 2 DIFF
DEFAULT(1.O°F) O.5°F
2nd thru 4th STAGE DELAY timer (where applicable)If STG DELAY
TIMERS is turned ON, the default delay is 20 minutes but can be pro-
grammed from 5 to 120 minutes in 5−minute increments. If first stage
fails to advance the ambient temperature toward the setpoint by 1.0°F
in the programmed delay time, then the second stage is activated.
Scroll to STG 2 DELAY (or 3 or 4); press ENTER. Select the desired
delay. Press SAVE.
STG 2 DELAY
DEFAULT(2OMIN) 5MIN
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