Monitoring and Operating the Controller
3/07 UDC3500 Universal Digital Controller Product Manual 211
4.10.5 Using MANUAL TUNE at start-up for Duplex (Heat/Cool)
When DUPLEX has been configured for MANUAL. This selection should be used when
tuning is needed only for the HEAT zone or only for the COOL zone but not both. If
Local Setpoint 1 is used, then the controller will perform a HEAT zone tune. If Local
Setpoint 2 is used, then the controller will perform a COOL zone tune.
Table 4-12 Procedure for Using MANUAL TUNE for Heat side of Duplex Control
Step Operation Press Result
1
Configure LSP1
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
Switch to
“Automatic” Mode
Man Auto
Until the “A” indicator is lighted (on
controllers with Manual option).
4
Show Tuning
Prompt
Lower
Display
Until “TUNE OFF” is shown on
lower display.
5
Initiate Tuning
Select “DO SLOW” or “DO FAST”
in lower display.
6
Tuning in operation
Lower
Display
Upper display will show a “T” as
long as ACCUTUNE process is
operating. When process
completes, tuning parameters are
calculated and lower display will
show “NO TUNE” prompt.
Table 4-13 Procedure for Using MANUAL TUNE for Cool side of Duplex Control
Step Operation Press Result
1
Configure LSP2
Lower
Display
Until 2SP (Local Setpoint 2) shows
in the lower display.
2
or
Until LSP2 is a value within the
Cool Zone (output below 50%).
3
Switch to
“Automatic” Mode
Man/Auto
Until the “A” indicator is lighted (on
controllers with Manual option).
4
Show Tuning
Prompt
Lower
Display
Until “TUNE OFF” is shown on
lower display.
5
Initiate Tuning
Select “DO SLOW” or “DO FAST”
in lower display.
6
Tuning in operation
Lower
Display
Upper display will show a “T” as
long as ACCUTUNE process is
operating. When process
completes, tuning parameters are
calculated and lower display will
show “NO TUNE” prompt.
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