JOHNSON CONTROLS
89
SECTION 5 – SEQUENCE OF OPERATION
FORM 100.50-NOM6
ISSUE DATE: 8/07/2017
5
– If the space temperature is 1.5° F or more
above the
“CV OCCUPIED COOLING”
setpoint
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 OCCUPIED
COOLING”
setpoint.
– When the
“CV OCCUPIED COO0LING”
setpoint is reached the Simplicity Elite control
will divide the elapsed time into 5-minute incre-
ments.
– The Simplicity Elite control will determine
how many 0.1° F the temperature was above the
“CV OCCUPIED COOLING”
setpoint.
– The Simplicity Elite control will then calculate
how many 0.1° F were satisfied per 5-minute in-
crement.
– This number will be recalculated each day.
– The Simplicity Elite control also records the
outdoor temperature when the above calculations
are made.
Subsequent Operation
On subsequent operation the following applies:
•
Each morning two hours before the scheduled oc-
cupied start time the Simplicity Elite control looks
at the space temperature and the
“CV OCCU-
PIED COOLING”
and
“CV OCCUPIED HEAT-
ING”
setpoints and determines if there is a need
for cooling or heating operation.
• Based on which need is identified the Simplicity
Elite control will calculate the number of 0.1° F
increments the space temperature is from setpoint
and multiple this value time the previous days cal-
culation on the number of 0.1° F the unit can sat-
isfy 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 Simplic-
ity Elite control will add 5 minutes to the above
calculated recovery time for every 10.0° F differ-
ence.
•
If heating mode is selected the Simplicity Elite
control will also compare the current outdoor
temperature to the outdoor temperature recorded
during the previous start up period.
– If the current outdoor air temperature is 10.0°
F or more below the previous day the Simplicity
Elite control will add 5inutes to the above calcu-
lated recovery time for every 10.0° F difference.
•
The outdoor damper will be kept closed during
this period unless it is being used to meet the oc-
cupied cooling space temperature requirement.
• Even if the space temperature satisfies the “
CV
OCCUPIED COOLING”
and
“CV OCCUPIED
HEATING”
setpoints the unit will not switch to
the occupied mode until the calculated warm up
/ cool down time has expired. However, the sup-
ply fan will remain energized during this time. If
the space temperature rises above the
“CV OC-
CUPIED COOLING”
, or below the
“CV OCCU-
PIED HEATING”
setpoints during this time the
cooling or heating will cycle back ON.
MORNING WARM UP
This feature can be used to energize the heating section
of the unit to bring the temperature of the space up to
conditions prior to the start of the occupied period.
The following parameters must be programmed in or-
der to use this feature:
•
“MORNING WARM UP ENABLE”
– must be en-
abled using Parameter 28 under the PROGRAM
key of the Simplicity Elite control board or under
the HEATING SETUP tab of the Simplicity PC
software package.
•
MORNING WARM UP/VAV RETURN AIR TEMP
SETPOINT”
– must be programmed using Pa-
rameter 29 under the PROGRAM key of the Sim-
plicity Elite control board or under the HEATING
SETUP tab of the Simplicity PC software pack-
age.
•
“HEATING MODE ENABLED FOR OPERA-
TION”
– must be enabled using Parameter 54
under the PROGRAM key of the Simplicity Elite
control board or under the HEATING SETUP tab
of the Simplicity PC software package.
