Honeywell UDC2500 - Manual (Page 120)

Monitoring and Operating the Controller
106 UDC2500 Universal Digital Controller Product Manual 4/07
Configuration Check for Duplex
See Subsection 3.6 - Accutune Set Up Group for details.
Make sure:
• TUNE has been enabled
• DUPLEX has been configured to Manual, Automatic or Disabled
4.11.3 Using AUTOMATIC TUNE at start-up for Duplex (Heat/Cool)
Used when DUPLEX has been configured for AUTOMATIC. This is the preferred
selection for most Heat/Cool applications when tuning a new chamber. This selection
will sequentially perform both Heat and Cool tuning without further operator
intervention.
Table 4-12 Procedure for Using AUTOMATIC TUNE at Start-up for Duplex Control
Step Operation Press Result
1
Configure LSP1
Lower
Display
Lower
Display
Lower
Display
Until SP (Local Setpoint 1) shows
in the lower display.
2 or
Until LSP1 is a value within the
Heat Zone (output above 50%).
3
Configure LSP2
Lower
Display
Lower
Display
Lower
Display
Until 2SP (Local Setpoint 2) shows
in the lower display.
4
or
Until LSP2 is a value within the
Cool Zone (output below 50%).
5
Switch to
“Automatic” Mode
M-A
Reset
M-A
Reset
M-A
Reset
Until the “A” indicator is lighted (on
controllers with Manual option).
6
Show Tuning
Prompt
Lower
Display
Lower
Display
Lower
Display
Until “NoTUNE” is shown on lower
display.
7
Initiate Tuning Select “DoSLOW” or “DoFAST” in
lower display.
Tuning in operation
Lower
Display
Lower
Display
Lower
Display
Upper display will flash “TUNE” as
long as ACCUTUNE process is
operating. When process
completes, tuning parameters are
calculated and lower display will
show “NoTune” prompt.
4.11.4 Using BLENDED TUNE at start-up for Duplex (Heat/Cool)
When DUPLEX has been configured for DISABLE. This is the preferred selection for
Heat/Cool applications which use a highly insulated chamber (a chamber which will lose
heat very slowly unless a cooling device is applied). Only one local setpoint (LSP 1) is
needed for this selection.