AAF UV05 Operation & Maintenance Manual
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Contents
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McQuay OM 751 27Description of OperationRemote Wall-Mounted Sensor with +/–3°FAdjustment (optional)When the optional remote wall-mounted sensor with +/–3°F adjustment dial is used, the UVCeffectively writes the value of the set point adjustment dial to the Set Point Offset Inputvariable.Note – If a network connection is used to adjust the Set Point Offset Input variable, you must notuse the optional remote wall-mounted sensor with +/–3°F adjustment.– If the keypad/display is used by room occupants to adjust the Set Point Offset, do not usethe optional remote wall-mounted sensor with +/–3°F adjustment.If you have the optional remote wall-mounted sensor with +/–3°F adjustment and anoccupant uses the keypad to make Set Point Offset adjustments, this overrides any+/–3°F adjustment on the optional remote wall-mounted sensor since the keypad/displayhas higher priority. If you find that changes to the +/–3°F adjustment on the remote wall-mounted sensor have no effect, it is likely that an occupant used the keypad/display tomake a Set Point Offset change. Cycle unit power to clear this situation and restore theability to change the Set Point Offset from the +/–3°F adjustment on the remotewall-mounted sensor.Remote Wall-Mounted Sensor with 55°F to 85°FAdjustment (optional)When the optional remote wall-mounted sensor with 55°F to 85°F adjustment dial is used, theUVC will effectively write the value of the set point dial to the Space Temp Set Point Inputvariable.Note – If a network connection is using the Space Temp Set Point Input variable, do not use theoptional remote wall-mounted sensor with 55°F to 85°F adjustment.– If it is intended that the LUI will be used by room occupants to adjust the Setpoint Offset,then you must not use the optional remote wall-mounted sensor with 55°F to 85°Fadjustment. When using the optional remote wall-mounted sensor with 55°F to 85°Fadjustment, the UVC will ignore any Setpoint Offset changes made at the LUI.Effective Set Point CalculationsThe UVC calculates the effective set point (Effective Set Point Output) based on severalfactors. These factors include the six occupancy set points for heating and cooling (OccupancyTemperature Set Point), occupancy mode, the value of the network variables Space Temp SetPoint Input, Set Point Offset Input, and the Set Point Shift Input as well as the optional wall-mounted sensor’s set point adjustment knob. As always, network inputs have priority overhardwired connections.The UVC determines if heating or cooling is required based on the current unit mode (Heat/Cool Mode Output) and then calculates the required set point for heating or cooling. Aftercalculating, the Effective Set Point Output network variable is set equal to the calculated setpoint. The Effective Set Point Output is the temperature set point that the UVC maintains,which normally appears on the keypad/display. |
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