Application

Sequence of Operation

Application Notes

Siemens Industry, Inc.

Application Note, App 6663

140-1109

2014-10-27

Application Notes

 If temperature swings in the room are excessive or there is trouble maintaining the

room temperature setpoint, the temperature loop needs to be tuned.

 If FLOW is oscillating while FLOW STPT is constant, then the flow loop requires

tuning.

 The controller as shipped from the factory keeps all associated equipment OFF.

See the

Start-up

document for how to release the controller and its equipment to

application control.

 Spare DOs can be used as auxiliary points that are controlled by the field panel

after being defined in the field panel's database. The combination of DO 3 and DO

4 may be used as auxiliary motor points. If using a pair of spare DOs to control a

motor, you must unbundle the corresponding motor command point.

For more information, contact your nearest Siemens Industry, Inc. representative.

Wiring Diagrams

NOTE:

The controller’s DOs control 24 Vac loads only. The maximum rating is 12 VA for

each DO. An external interposing relay is required for any of the following:

• VA requirements higher than the maximum

• 110 or 220 Vac requirements

• DC power requirements

• Separate transformers used to power the load

(for example part number 540-147, Terminal Equipment Controller Relay Module)

NOTE:

Thermistor inputs are 10K (default) or 100K software selectable (AUX TEMP AI X).

Wiring for AI with a 4 to 20 mA Sensor.