Carrier VVT Zone - Page 70

Appendix A: VVT Zone Controller Points/Properties
66 VVT Zone Controller
Point Name/Description
Default/Range
Linkage
Provider
– Enter the MS/TP
Network Number
and MAC
Address
of the linked
air source controller.
Network Number
Address
D:
R:
D:
R:
0
1 to 65535
0
1 to 99
Airside Linkage Status
– If
Active
, the controller is part of a linked system. If
Not
Active
, the controller is a stand-alone device.
R: Not Active/Active
Linkage Zone Type
– Select whether the controller is a Master or a slave.
Select
VAV Master
if the controller is the Master or a sub-master in a VAV application.
Select
VVT Master
only if the controller is the Master in a VVT application. VVT
applications do not support sub-masters.
D:
R:
Slave
Slave
VVT Master
VAV Master
Active Heating Caller
– Determines if the zone will be counted as a heat caller for
system heating when the zone has a local demand for heat.
D:
R:
Yes
No/Yes
Active Cooling Caller
– Determines if the zone will be counted as a cool caller for
system cooling when the zone has a local demand for cooling.
D:
R:
Yes
No/Yes
Linkage Callers
– The minimum number of zones required to make the air source go
into heating or cooling mode. 1 is typical for systems with 8 zones or less. For larger
systems, increase the number by 1 for each 6 zones. For example, 3 linkage callers
for a 20 zone system.
D:
R:
1
1 to 32
System Mode Reselect Timer (minutes)
– Applies only to a VVT master. Defines how
long the system continues to operate in the current mode before it reassesses all
zones while the current demand is still active.
D:
R:
30
10 to 120
Inhibit Heating Call from this zone
- If Yes, the VVT Master ignores this controller as a
heating caller.
D:
R:
No
No/Yes
Inhibit Cooling Call from this zone
- If
Yes
, the VVT Master ignores this controller as a
cooling caller.
D:
R:
No
No/Yes
Linkage RH Type
– Determines if the VVT or VAV Master sends to the air source the
average or maximum values of all linked zone controllers that have a relative
humidity (RH) sensor.
D:
R:
Avg
Avg/Max
Linkage IAQ Type
– Determines if the Master controller sends to the air source the
average or maximum values of all linked zone controllers that have a CO
2
D:
sensor for
DCV and IAQ control.
R:
Max
Avg/Max
Air Source Mode
– If
Airside Linkage Status
is
Active
, this is the current mode of the
linked air source. If
Airside Linkage Status
is
Not Active
, this is the mode of the air
source as determined by the zone controller’s SAT sensor.
D:
R:
OFF
WARMUP
HEAT
COOL
FREECOOL
PRESSURE
EVAC
VENT
Air Source Supply Air Temp
– Shows the air source’s SAT when
Airside Linkage
Status
is
Active
. If
Airside Linkage Status
is
Not Active
, a “?” is displayed.
R: ? or -56 to 245°F