WattMaster WCC II - Manual (Page 90)

Section 3: Screen Descriptions
WCC II Operator’s Guide
Operator Interfaces 3-58
Locked:
The system will use the advanced time variable specifi ed by the
user and will not adjust these values.
Adaptive:
The system will automatically adjust the advance start time based
on previous system performance. This allows the ECC/WCC II
system to “fi ne tune” the morning start time so your building is at
the target temperature when the schedule it has been assigned to
goes ON.
Disabled:
The optimal start will be disabled when this choice has been
selected. The optimal start will have no effect and the value input
for the “based on schedule” category of this optimal start will
provide the on/off schedule for the equipment.
STATUS
The Optimal Start Screen will automatically display one of the
four messages below:
Status:
The messages correspond with the following descriptions below:
OFF: The Optimal Start program is not in effect at the moment.
ON SCHEDULE: The Optimal Start program is not in effect at the
moment, but the schedule which is assigned to the Optimal Start is
in the “ON” mode.
COOL START: HEAT START: The Optimal Start program is in
effect at the moment and is either initiating a COOL START or a
HEAT START.
REASON:
Done On Time: The space temperature was at target temperature
within 5 minutes of when the week schedule went on.”
Done Early: The space temperature was at target temperature
more than 5 minutes before the week schedule went on.
Done Late: The space temperature was at target temperature more
than 5 minutes after the week schedule went on.
COOLING TARGET: _____ °F
HEATING TARGET: _____ °F
Specifi es the desired temperature to be maintained in the space by
the time the schedule associated with the optimal start goes on.
The cooling target temperature MUST be greater than the heating
target temperature. Also, the cooling target temperature must be
greater than or equal to the ON schedule setpoint of the zone in
question, and the heating target temperature must be less than or
equal to the ON schedule setpoint of the zone in question.
LAST START OCCURRED AT _____ ON _____
The system will automatically fi ll in the time and date of last start.
This permits the user to check the system during the day to observe
when the Optimal Start Program began.
A Change-Of-State Trend Log may also be used to log the start and
stop time of the Optimal Start. To use the Change-Of-State Trend
Log, record the change of state for Sn (n being a number from 1 to
64 which corresponds to the optimal start in question).
with Indoor =
with Outdoor =
When the last start occurred, the Outdoor and Indoor temperatures
at the time of the start will automatically be recorded and displayed.
This will aid you in monitoring the Optimal Start Programs for
your system.
Last start completed
required major adjustment
-
Locked Mode
The “required major adjustment” message will appear when
the Optimal Start Screen is in the “locked mode” if the space
temperature did not reach target temperature within 2 minutes of
when the week schedule for this screen went ON.
Adaptive Mode
The “required major adjustment” message will appear when
the Optimal Start Screen is in the “adaptive mode” if the target
temperature was not reached within the number of minutes
equal to the difference between the actual temperature and target
temperature when the optimal start began. That is, if there was
a 10 °F difference between the actual temperature and the target
temperature when the Optimal Start Program began, then the
“required major adjustment” message will appear if the space
temperature did not reach target temperature within 10 minutes of
when the week schedule went ON.