Appendix A: VAV Zone II Points/Properties
VAV Zone II Controllers
CARRIER CORPORATION ©2019
Installation and Start-up Guide
All rights reserved
71
Point Name/Description
Range
Shutdown
– When
Active
, disables all control functions, at normal equipment time
delays and maintains minimum airflow.
D:
R:
Inactive
Inactive/Active
Unit Configuration
Navigation:
i-Vu® / Field Assistant:
Properties
>
Control Program
>
Configuration
>
Unit Configuration
Point Name/Description
Default/Range
Heat Enable
– Enables the reheat function.
D:
R:
Enable
Disable/Enable
Parallel Fan Heat On Delay
– Parallel type terminal only. The delay before reheat is
enabled after the zone has a heating demand. The terminal fan runs immediately and
attempts to meet the heating demand using the heated air from the ceiling plenum.
D:
R:
15 min
0 to 60 min
Fan Off Delay
– Fan-type terminals only. The amount of time the terminal fan continues
to operate after a heating demand is satisfied.
D:
R:
120 seconds
0 to 180 seconds
Maximum Heating SAT
– The maximum supply air temperature allowed while ducted
heat is operating. Ducted type supplemental heat is controlled so that it will not exceed
this limit or the configured
High SAT Alarm Limit
.
Set the
Maximum Heating SAT
limit to 5°F (2.8°C) above the desired maximum supply
air temperature you would expect. Refer to
Alarm Configuration
>
High SAT Alarm Limit
to properly set this parameter.
D:
R:
95°F (35°C)
80 to 140°F
(26.6 to 60°C)
Maximum RH Override Airflow
– The maximum airflow allowed when the RH function
overrides the temperature control. When active, the damper modulates to the
temperature control requirement or the RH override airflow, whichever is greater. This
value is the percentage of the
Maximum Cooling Airflow Setpoint
.
D:
R:
60%
0 to 100%
DCV Max Vent Airflow
– The maximum airflow allowed when the IAQ function overrides
the temperature control. When active, the damper modulates to the temperature
control requirement or the
DCV Max Vent Airflow
, whichever is greater. This value is a
percentage of the
Maximum Cooling Airflow Setpoint
.
D:
R:
70%
0 to 100%
Filter Service Alarm Timer
– Fan type terminals only. The amount of time the fan will
run before generating a
Filter Alarm
. Set to 0 to disable the alarm.
D:
R:
0 hr
0 to 9999 hr
T55 Pushbutton Override
– Enables or disables the use of a pushbutton override from a
local space temperature sensor.
D:
R:
Enable
Disable/Enable
Summary of Contents for VAV Zone II
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