Honeywell UDC 3300 manual Using SP tuning at start-up for duplex heat/cool

Using SP tuning at start-up for duplex (heat/cool)

After SP or SP+PV has been enabled, use the procedure in Table 5-38 to use SP tuning at start-up for duplex (heat/cool) control.

Table 5-38 Procedure for Using SP Tuning at Start-up for Duplex

Step	Action
1
	Put the controller into manual mode—	MANUAL/AUTO	key.

2Heat Zone:

•Adjust the Output to a value above 50 % and at least 5 % lower than the normal heating setpoint value.

•Let the PV stabilize.

• Press the MANUAL/AUTO key to start tuning for Heat zone.

The controller will switch to automatic mode and the process will start to move toward the setpoint and will line out with the proper Heat tuning constants. A large T appears on the left side of the upper display to indicate that SP tuning is in progress.

When the T disappears, tuning is completed and final values are entered for PID set 1 parameters in the Tuning group.

3Cool Zone:

•Adjust the Output to a value below 50 % and at least 5 % above the normal cooling setpoint value.

•Let the PV stabilize.

• Press the MANUAL/AUTO key to start tuning for Cool zone.

The controller will switch to automatic mode and the process will start to move toward the setpoint and will line out with the proper Cool tuning constants. A large T appears on the left side of the upper display to indicate that SP tuning is in progress.

When the T disappears, tuning is completed and final values are entered for PID set 2 parameters in the Tuning group.

SP tuning after start-up

Aborting SP tuning

SP tuning will occur whenever the controller is in automatic mode and a setpoint change occurs which is greater than the previously configured minimum setpoint change value.

The controller will delay using any setpoint changes for 30 seconds to enable it to calculate whether to SP tune or not. But if the controller is toggled between LSP1 and LSP2 or if any other key (such as LOWER DISPLAY) is pressed, the setpoint change is immediate.

A large T is displayed in the upper display whenever tuning is in progress. During this time, no changes to the configuration parameters, including the setpoint, are permitted.

If it is necessary to stop or abort the tuning:

• Press the MANUAL/AUTO key to return to manual mode. This will

cause an immediate abort of tuning.

•Disable SP or SP+PV in the Accutune Set Up group at function prompt ACCUTUNE or ACCUTUN2.

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