Carrier 30MP Installation And Startup Manual

Sequence of Operation30MP Multi-chiller CARRIER CORPORATION ©2018Installation and Start-up Guide All rights reserved23You can change the occupancy source to one of the following:• Occupancy SchedulesThe controller is occupied 24/7 until you configure a time schedule using the Equipment Touch, FieldAssistant, or the i-Vu® application, or until a third party control system Enables/Disables the BAS On/Offpoint. You can disable this by going to Configuration > Unit Configuration > Occupancy Schedules andchanging the point from Enable to Disable and clicking OK.NOTE You must Enable this point in order for the Equipment Touch, Field Assistant, or the i-Vu® applicationto assign a time schedule to the controller.• ScheduleThe unit operates according to the schedule configured and stored in the unit. The schedule is accessible inthe Equipment Touch, Field Assistant, or the i-Vu® application. The daily schedule consists of a start and stoptime (standard or 24 hour mode) and seven days of the week, starting with Monday and ending on Sunday.• Occupancy Input Contact (optional)If configured for remote occupancy control (default), the controller can use an external dry contact closure todetermine the occupancy status of the unit. Disable the Occupancy Schedules to use the occupancy contactinput.NOTE Scheduling can only be controlled from one source.• BAS (Building Automation System) On/OffFor use with a Building Automation System that supports network scheduling, you must disable theOccupancy Schedules so the BAS can control the unit through a network communication and the BASscheduling function.NOTE Scheduling can either be controlled from the unit or the BAS, but not both.• System OccupancyUses the network to obtain an occupancy status value from another controller, which is read over the networkand used by this controller. Occupancy Schedules MUST be set to Disable to use this function.NOTE Scheduling can only be controlled from one source.Demand limitingThe 30MP Multi-chiller can provide up to 3 stages of demand limiting, if connected to an electric meteringprogram indicating that demand limiting is required.Demand Limiting works using 2 different methods. The first connects the BACnet network input point System CoolDemand Level to the electric metering program, to send a value for the demand level. The second method is abinary input point BI-5 Ext Demand Limit that sets the demand level to level #2 when the input is active.Demand Level 1, called the red line limit, sets the maximum chiller capacity to the current operating capacity, sothat no additional capacity can be added. This prevents further increase in demand, although it will not preventany necessary capacity reduction.Demand levels 2 and 3 provide an adjustment to the operating setpoint. Demand level 2 occurs when SystemCool Demand Level is set to 2 or the Ext Demand Limit input is active. This increases the chilled water setpoint bythe configured Demand Level 2 Cool Adj amount. Demand Level 3 occurs when System Cool Demand Level is setto 3. This increases the chilled water setpoint by the configured Demand Level 3 Cool Adj amount. If the SystemCool Demand Level is set to 0 and the BI-5 Ext Demand Limit is inactive, then there is no demand limiting.