Honeywell UDC2500 manual 108

Monitoring and Operating the Controller

Step	Operation	Press	Result
5	Initiate Tuning		Select “DoSLOW” or “DoFAST” in
			lower display.
6	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.

Table 4-15 Procedure for Using MANUAL TUNE for Cool side of Duplex Control

Step	Operation	Press	Result
1	Configure LSP2		Until 2SP (Local Setpoint 2) shows
		Lower
		Display	in the lower display.
2		or	Until LSP2 is a value within the
			Cool Zone (output below 50%).
3	Switch to		Until the “A” indicator is lighted (on
		M-A
	“Automatic” Mode	Reset	controllers with Manual option).
4	Show Tuning		Until “NoTUNE” is shown on lower
		Lower
	Prompt	Display	display.
5	Initiate Tuning		Select “DoSLOW” or “DoFAST” in
			lower display.
6	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.

108 UDC2500 Universal Digital Controller Product Manual 4/07