York ECO2 YPAL 050, Installation & Operation Manual

Page: 87 / 168

87 JOHNSON CONTROLS
FORM 100.50-NOM6 (1207)
5
•
Intelli-Start will only work on a Constant Volume
system using a space sensor.
•
Intelli-Start will only work when the internal
scheduling feature is used. It will not work using
a hard wired or communicated Occupied com-
mand.
•
Intelli-Start will only function during the fi rst
occupied period of each day.
Sequence of Operation
First day of heating or cooling operation
•
Two hours prior to the start of the occupied period
the Simplicity Control will compare the space
temperature to the
“CV OCCUPIED COOLING”
or the “CV OCCUPIED HEATING” set points.
•
Heating operation
– If the space temperature is 1.5° F or more
below the “CV OCCUPIED HEATING” set
point the Simplicity Elite control will stage on
the heat using the normal heating with space
sensor logic.
– The Simplicity Elite control will record the
space temperature and how long it takes to
bring the space temperature to the
“CV OC-
CUPIED HEATING” set point.
– When the “CV OCCUPIED HEATING” set
point is reached the Simplicity Elite control
will divide the elapsed time into 5-minute
increments.
– The Simplicity Elite control will determine
how many 0.1° F the temperature was below
the
“CV OCCUPIED HEATING” set point.
– The Simplicity Elite control will then cal-
culate how many 0.1° F were satisfi ed per
5-minute increment.
– This number will be recalculated each day.
– The Simplicity Elite control also records the
outdoor temperature when the above calcula-
tions are made.
•
Cooling operation
– If the space temperature is 1.5° F or more
above the “CV OCCUPIED COOLING” set
point the Simplicity Elite control will stage on
cooling operation using the normal Cooling
with space sensor logic.
– The Simplicity Elite control will record the
space temperature and how long it takes to
bring the space temperature to the “
CV OC-
CUPIED COOLING” set point.
– When the “CV OCCUPIED COO0LING” set
point is reached the Simplicity Elite control
will divide the elapsed time into 5-minute
increments.
– The Simplicity Elite control will determine
how many 0.1° F the temperature was above
the
“CV OCCUPIED COOLING” set point
– The Simplicity Elite control will then cal-
culate how many 0.1° F were satisfi ed per
5-minute increment.
– This number will be recalculated each day.
– The Simplicity Elite control also records the
outdoor temperature when the above calcula-
tions are made.
Subsequent Operation
•
Each morning two hours before the scheduled
occupied start time the Simplicity Elite control
looks at the space temperature and the
“CV OC-
CUPIED COOLING” and “CV OCCUPIED
HEATING” set points and determines if there is
a need for cooling or heating operation.
•
Based on which need is identifi ed the Simplicity
Elite control will calculate the number of 0.1°
F increments the space temperature is from set
point and multiple this value time the previous
days calculation on the number of 0.1° F the unit
can satisfy in 5 minutes. This will determine
how many minutes prior to the beginning of the
occupied period the control will need to start the
heating or cooling operation.
•
If cooling mode is selected the Simplicity Elite
control will also compare the current outdoor
temperature to the outdoor temperature recorded
during the previous days start up period.
– If the current outdoor air temperature is
10.0° F or more above the previous day the
Simplicity Elite control will add 5 minutes to
the above calculated recovery time for every
10.0° F difference.