Free Cooling Bas Network Override; Alarm Monitoring And Control; Acknowledging Alarms On The Csm; Figure 47. Acknowledging Alarms (Main > View Alarms) - McQuay MicroTech II Operation Manual

Free Cooling BAS Network Override

The CSM's operating state can be overridden by a network command received from a BAS to provide a custom free
cooling strategy. The CSM provides the BAS with a Free Cooling data point (see ED 15075-BACnet and ED 15076-
Modbus) to allow the BAS to override the normal operation of the CSM in specific instances.

Alarm Monitoring and Control

The CSM monitors the chiller system equipment for specific alarm conditions that may occur. If the CSM detects an alarm
condition, it indicates the CSM Alarm on the System Status screen, logs the alarm for acknowledgement in the View Alarms
screen, identifies the alarm, and executes appropriate control actions that fail-safe the equipment.
System damage hazard. Alarms associated with optional sensors must be enabled when the optional sensor is
installed. Each time a sensor is installed the "sensor present flag" on the I/O Config screen must be set to YES to
initiate that sensors alarm features. If this flag is not set the fail-safe features of the Chiller System Manager will not
execute when that sensor fails.
The CSM also indicates the existence of chiller alarms, and it tells the operator which chiller or chillers have them. The
CSM's user interface tells the operator the specific current chiller alarms on the Chiller Status screen. The CSM also logs
the last 10 chiller alarms for each chiller and displays them on the Misc screen (to view a log, left click on a Chiller Alarm
Log and a web page will appear displaying the alarms).

Acknowledging Alarms on the CSM

Each CSM alarm will be logged for viewing at the user interface at the View Alarms web page. Alarms will remain on this
screen until an operator acknowledges viewing each alarm. Important information on the View Alarms screen includes a
TIME stamp of when the alarm occurred and a TEXT description of what alarm occurred.
Figure 47. Acknowledging Alarms (Main > View Alarms)
To acknowledge viewing an alarm, click on the box to the left of the alarm you wish to acknowledge, then click on the
Acknowledge button on the top or bottom of the web page. After acknowledging alarms, refresh the Unacknowledged
Alarms web page to see that they are no longer on the list (to refresh on Internet Explorer go to View > Refresh).
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