Honeywell UDC2500 manual Using Automatic Tune at start-up for Duplex Heat/Cool

Monitoring and Operating the Controller

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

4.11.3Using 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		Until SP (Local Setpoint 1) shows
		Lower
		Display	in the lower display.
2		or	Until LSP1 is a value within the
			Heat Zone (output above 50%).
3	Configure LSP2		Until 2SP (Local Setpoint 2) shows
		Lower
		Display	in the lower display.
4		or	Until LSP2 is a value within the
			Cool Zone (output below 50%).
5	Switch to		Until the “A” indicator is lighted (on
		M-A
	“Automatic” Mode	Reset	controllers with Manual option).
6	Show Tuning		Until “NoTUNE” is shown on lower
		Lower
	Prompt	Display	display.
7	Initiate Tuning		Select “DoSLOW” or “DoFAST” in
			lower display.
	Tuning in operation		Upper display will flash “TUNE” as
		Lower
		Display	long as ACCUTUNE process is
			operating. When process
			completes, tuning parameters are
			calculated and lower display will
			show “NoTune” prompt.

4.11.4Using 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.

106 UDC2500 Universal Digital Controller Product Manual 4/07