Honeywell S7999D SOLA User Manual page 40

Fig. 92. 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
S7999D. The R7910 or R7911 don't collect any
historical data for trending purposes. For this
reason any S7999D reset causes all R7910 or
R7911 sampling to start over with no data.
Trend analysis of the following data from each R7910/R7911
is possible:
65-0315—02
Table 58. R7910/R7911 Trend Analysis Data.
Data
Demand source
Outlet temperature (R7910
only)
Firing rate
Fan speed
Flame signal strength
Inlet temperature (R7910
only)
DHW temperature (R7910
only)
Outdoor temperature
Stack temperature
Header temperature (R7910
only)
CH setpoint
DHW setpoint (R7910 only)
Central Heat Operation
Analysis
Domestic Hot Water
Operation Analysis (R7910
only)
Vessel Analysis
Trend Analysis Snapshot
The trend analysis snapshot file is stored in Comma
Separated Value (CSV) format in the S7999D so it can be
imported into a spreadsheet program such as Microsoft Excel.
The trend analysis snapshot file can be viewed in graph form
on the S7999D. It can also be copied to a USB device. At any
time, pressing the "camera" button on the top left corner in the
menu bar will capture a screenshot, which can be transferred
to a USB memory stick. Go to Home page--> Setup--> Display
Diagnostics--> Screenshot--> press the snapshot file on the
list --> Copy to USB.
Diagnostics
Pressing the Diagnostics button permits some display
hardware diagnostics (see Fig. 93). Normally, these
diagnostics are applicable only for factory testing
purposes, but conditions may arise that warrant this
testing.
40
Comment
CH, DHW, LL (Lead Lag), or
FP (Frost Protection) Steam
Sensor
% or RPM
PWM feedback
V
If enabled
If enabled
If enabled
If enabled
If enabled
Actual CH setpoint based on
time of day (TOD).
Actual DHW setpoint based
on TOD.