833-3577 CB-FALCON SYSTEM OPERATOR INTERFACE
750-241 39 65-0296—01
NOTE: For system trend analysis graphs the Clear button
isn’t present, so no status variables can be cleared.
A snapshot of the trend analysis graph can be taken and
saved to the 833-3577. The user is asked to confirm the save
before it occurs.
NOTE: While this snapshot is saved, trend data sampling for
all 833-3639s is temporarily halted. Gaps or static
level values occur in the trend data as a result.
The date and time that the snapshot is taken is stored with the
snapshot. Only the status variables displayed in the graph are
stored in the snapshot. All raw sample data for the status
variables are stored so that any sample rate can be viewed
offline.
Sample data stored in snapshot is either the real-time status
at the time that the Save button is pressed or it is the sample
data at the time that the graph is stopped.
Special case trend analysis graphs for PID tuning can be
viewed for CH, DHW, and Lead Lag demands.
Fig. 96. PID Trend analysis page.
Data included in the PID analysis graph are:
• Sensor temperature (outlet for CH, DHW for DHW, and
header for Lead Lag)
• Setpoint (for corresponding demand source)
• Burner firing rate
• Hysteresis on (for corresponding demand source)
• Hysteresis off (for corresponding demand source)
The Clear button is disabled for the PID analysis (doesn’t
apply to hysteresis).
The default sample rate is 15 sec periods (a tick mark on the
X axis for every 15 second period, with minutes displayed
every 4 tick marks).
Special case trend analysis graph for 833-3639 vessel heat
exchange can be selected.
Fig. 97. Vessel analysis page.
Data included in the vessel analysis graph are:
• Outlet temperature
• Inlet temperature
• Heat exchange (outlet – inlet)
• Burner firing rate
Automatic sampling of trend data takes place when the trend
analysis report is displayed. No user intervention is necessary
to invoke sampling.
NOTE: Sample data is collected and stored in the 833-3577.
833-3639 doesn’t collect any historical data for trend-
ing purposes. For this reason any 833-3577 reset
causes all 833-3639 sampling to start over with no
data.
Trend analysis of the following data from each 833-3639 is
possible:
Table 39. 833-3639 Trend Analysis Data.
Data Comment
Demand source CH, DHW, LL (Lead Lag), or
FP (Frost Protection)
Outlet temperature
Firing rate % or RPM
Fan speed PWM feedback
Flame signal strength V
Inlet temperature If enabled
DHW temperature If enabled
Outdoor temperature If enabled
Stack temperature If enabled
Header temperature If enabled
CH setpoint Actual CH setpoint based on
time of day (TOD).
DHW setpoint Actual DHW setpoint based
on TOD.
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