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506920−01 09/12
Page 30
Stage Delay & Differential Settings (Installer settings)
1st Stage Differential1ĊStage 1 differential is used in all thermostats. The
default is 1.0°F but can be programmed between 0.5° and 3.0°F in 0.5°F in-
crements.
From the equipment button, use the arrows to select 1st Stage Differential.
Press edit. Use the up/down arrows to adjust to the desired setting and
press save.
2nd Stage Differential (where applicable)2ĊThe default is 1.0°F but can be
programmed between 0.5° and 8.0°F in 0.5°F increments.
3rd Stage Differential through 6th Stage Differential (where applica-
ble)3ĊThe default is 0.5°F but can be programmed between 0.5°F and
8.0°F in 0.5°F increments.
NOTE − Each stage’s differential is based on the previous stage’s differential
endpoint. For example, in cooling mode, if stage 1 differential is set to 1.0ºF,
then the system comes on 0.5ºF above setpoint and the 2nd differential
starts at the 0.5ºF stage 1 endpoint and extends to 2nd stage differential end-
point.
NOTE − In normal operation, the end of the cooling demand is at the setpoint
−0.5ºF and the end of the heating demand is at the setpoint +0.5ºF.
Staged Delay Timers4Ċdefault Enabled. When ON, 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) in cases when the
previous stage of heating or cooling will not raise or lower the room tempera-
ture to the setpoint in a given time.
When Disabled is selected all stage delay timers are disabled. This means
stages are changed based on the temperature and not their timer delays.
NOTE − The 2nd Stage Delay Timer (when Staged Delay Timers is Enabled)
is used for both HEATING and COOLING. However, if the system has a vari-
able capacity furnace, 2nd Stage Delay Timer will only be used for COOL-
ING (not for heating, as the variable capacity algorithm ignores delay tim-
ers).
2nd thru 6th Stage Delay timer (where applicable)5ĊIf Staged Delay Tim-
ers are Enabled, the default delay is 20 minutes but can be programmed
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.
Heat Cool Stages Locked In6Ċdefault Disabled (heat/cool stages are
turned off separately). If changed to Enabled, heat/cool stages are turned off
together. Scroll to Heat Cool Stages Locked In; press edit. Use arrows to
select between Disabled or Enabled. Press save.
Lock In 2nd stage HP by Outdoor Temp7Ċdefault Off (heat pump stage 2
operates normally). Use this setting to lock in the 2nd stage compressor
when the outdoor temperature is at or less than the LOCK TEMP setpoint.
Scroll to Lock In 2nd stage HP by Outdoor Temp; press edit. Use arrows to
select a temperature between 40 and 55ºF. Press save.