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Lead/Lag Control
Note: Lead/lag control is only available on machines with PSIO Software Version 09 or higher. Lead/lag is a control system process that automatically starts and stops a lag or second
chiller in a
Note: Lead/lag configuration is viewed and edited under Lead/Lag in the Equipment Configura- tion table (located in the Service menu). Lead/lag status during machine operation is viewed in the MAINT04 table in the Control Algorithm Status table. See Table 2.
Lead/Lag System Requirements:
•all machines must have PSIO software capable of performing the lead/lag function
•water pumps MUST be energized from the PIC controls
•water flows should be constant
•CCN Time Schedules for all machines must be identical