Honeywell UDC2500 User Manual
Page 121
Monitoring and Operating the Controller
4/07
UDC2500 Universal Digital Controller Product Manual
107
This selection results in performance tuning over the full range utilizing both Heat and
Cool outputs to acquire blended tune values that are then applied to both Heat and Cool
tuning parameters. Both PID sets are set to the same values.
Table 4-13 Procedure for Using BLENDED 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 the Setpoint is to the desired
value.
3
Switch to
“Automatic” Mode
M-A
Reset
M-A
Reset
M-A
Reset
Until the “A” indicator is lighted (on
controllers with Manual option).
4
Show Tuning
Prompt
Lower
Display
Lower
Display
Lower
Display
Until “NoTUNE” is shown on lower
display.
5
Initiate Tuning
Select “DoSLOW” or “DoFAST” in
lower display.
6
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.
4.11.5
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 4-14 Procedure for Using MANUAL TUNE for Heat side of 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
Switch to
“Automatic” Mode
M-A
Reset
M-A
Reset
M-A
Reset
Until the “A” indicator is lighted (on
controllers with Manual option).
4
Show Tuning
Prompt
Lower
Display
Lower
Display
Lower
Display
Until “NoTUNE” is shown on lower
display.