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sourcefor a 3V control system, the PremierLink controller
is not required to be on the same CCN bus but i t is
recommended. Linkage will be activewhen it is initiated
from the Linkage thermostat or the 3V Linkage
Coordinator through CCN communications and requires
no configuration. Only one device can be linked to the
PremierLinkcontroller.
Once Linkage is active, thePremierLink controller’s own
SPT, temperature setpoints, and occupancy are ignored
and the controller will use the information provided by the
remote linkage device. The followinginformation will be
receivedfrom the remote linkeddevice andcan be viewed
in the maintenance displaytable:
SSupervisory Element
SSupervisory Bus
SSupervisory Block
SAverageOccupied Heat Setpoint
SAverageOccupied Cool Set point
SAverageUnoccupied Heat Setpoint
SAverageUnoccupied Cool Set point
SAverageZone Temp
SAverageOccupied Zone Temp
SOccupancy Status
In return, the PremierLink controllerwill provide its SAT
and operatingmode to the linked device.
It will convert its operating modes to Linkage modes. See
Table30.
Table30 – Li nkage Modes
ROOFTOP MODE VALUE LINKAGE MODE
DemandLimit N/A N/A
Heat 3Heating
Coolor Fre e Cooling 4Cooling
IAQ Control N/A N/A
Temp . Comp ens ated
StartHeat 2Warm---up
Temp . Comp ens ated
Start Cool 4Cooling
IAQPurge 6Pressurization
Occupied
(Indoor Fan ON) 4Cooling
UnoccupiedFree
Cool 5UnoccupiedFree
Cooling
FireShutdown 7Evac
Factory/Field Test 1Off
Off 1Off
The PremierLink controller will generate a Linkage
Communication Failure alarm if a failure occurs for 5
consecutive minutes once a Linkage has previously been
established. It will then revert back to its own SPT,
setpoints and occupancy schedule for control. For this
reason, Carrier strongly recommends that an SPT be
installed in the space on open plenum systems or in the
return air duct of ducted return air systems to provide
continued backup operation. When Linkage
communication is restored, the controllerwill generate a
return to normal.
For more information on how the PremierLink controller
is used in conjunctionwith the Carrier 3V control system,
contact your CCN controls representative.
IMPORTANT:The Prem ierLink controller should not be
used as a linked air source in a ComfortIDtVAVsystem.
The ComfortID VAVsystem will NOT function correctly
when applied with a PremierLink controller as the air
source, resulting in poor comfort control and possible
equipment malfunction.
NOTE: The PremierLink controller can be used as an air
source in a 3V Pressure Independent (PI) System (a 3V
Linkage Coordinator with ComfortID PI Zone
Controllers), but it should not be used as an air source
with ComfortID controllers unless a 3V zone controller i s
used as the Linkage Coordinator. Contact your Carrier
CCN controlsrepresentative for assistance.
Demand Limit — If the demand limit option is enabled,
the control will receive and accept Redline Alert and
Loadshed commands from the CCN loadshed controller.
When a redline alert is received, the control will set the
maximum stage of capacity equal to the stage of capacity
that the unit is operating at when the redline alert was
initiated.
When loadshed command is received the control will
reduce capacity asshown in Table 31.
Table31 – Loadshed Command — Gas and Electric
HeatUnits
CURRENTCAPACITY NEW C APACITY
CMP1 DX Cooling OFF
CMP1+CMP2 CMP1
HS1 HeatOFF
HS1+HS2(+HS3) HS1
The controller will have a maximum demand limit timer
of 1 hour that prevents the unit from staying in load shed
or redline alert longer than 1 hour in the event the
controller loses communication with the network load
shed module. Should the maximum demand limit timer
expire prior to receiving the loadshed device command
from CCN, the control will stopdemand limit mode and
return to normal operation.
RTU--MP Sequenceof Operation
The RTU--MP will control the compressor, economizer
and heating outputs based on its ownspace temperature
input and setpoints. An optional CO2IAQ sensor mounted
in the space can influence the economizer minimum
position. The RTU--MPhas its own hardware clock that is
set automatically when the software is installed on the
board. The RTU--MP’sdefaul t is to control to occupied
setpoints all thetime, until a type of occupancy control is
set. Occupancy types are described in the scheduling
section. The following sections describe the operation for
the functions of the RTU--MP. All point objects that are
referred to in this sequence will be in reference to the
objects as viewed in BACview6Handheld.
Scheduling
Scheduling is used to start heating or cooling (become
occupied) basedupon a dayof week and a time period and
48TC