Appendix A: TV-VAVB3-E2 Points/Properties
TruVu™ VAVB3
-E2
CARRIER CORPORATION ©2022
Installation and Start-up Guide
All rights reserved
121
Point Name/Description
Default/Range
External Actuator Enable
–
Enable if the controller's analog output is used for an
external high-torque or slave actuator. Enabling this setting disables the output for
Modulating Hot Water or Combination reheat functions.
D:
R:
Disable
Disable/Enable
Heat Type
–
The type of supplemental reheat that the zone controller will control. The
heat may be used with system heat, depending on the space temperature demand.
Options:
None
–
no heat
Modulating
–
ducted or baseboard modulating hot water
Two Position
–
two position hot water
Staged EH
–
ducted or baseboard electric heat
Combination
–
combination baseboard modulating hot water and ducted staged
electric heat
CV Modulating
–
constant volume modulating reheat used for single duct terminal
application with modulating hot water reheat (typically used in hospital applications)
SCR Electric
–
modulating control for SCR-type electric heater
Modulating Smart Valve
–
ducted or baseboard modulating hot water using a Smart
Valve
Combination Smart Valve
–
combination baseboard modulating hot water using a
Smart Valve and ducted staged electric heat
D:
R:
None
None
Modulating
Two Position
Staged EH
Combination
CV Modulating
SCR Electric
Modulating Smart Valve
Combination Smart Valve
Ducted Heat
–
Determines whether the zone is using ducted heat or baseboard. If
Heat
Type
is
Combination
, set this field to
Yes
for ducted heat.
D:
R:
Yes
No/Yes
VAV Reheat
–
If set to
Enable
and
Heat Type
is
Modulating
, a need for heat first
modulates the supply air temperature up to the configured
Maximum Heating SAT
(90ºF [32.2°C] default). A further heating demand will increase the airflow from the
minimum rate up to the configured
Auxiliary Heat Min Airflow
. Applicable to single duct
terminals only.
D:
R:
Enable
Disable/Enable
CV Modulating PID
–
This BACnet object calculates the amount of capacity required to
satisfy the current space temperature setpoint, when the terminal is heating and the
Heat Type
is set to
CV Modulating
.
CAUTION
The default values should be changed only by a technician trained in PID
Loop algorithms.
D: Type = reverse
Update Interval = 0:15
P = 20 (36 metric)
I = 1.0 (1.8 metric)
D = 0
Bias = 0
Deadband = 0
VAV Heating
–
Set to
Enable
to have the terminal modulate its airflow to meet a zone
heating demand when the air source mode is Heating or Warm-up. Always set to
Disable
for parallel fan terminals.
D:
R:
Disable
Disable/Enable
Number of Heat Stages
–
The number heat stages when the
Heat Type
is
Staged EH
.
Fan-powered terminals are limited to no more than 2 stages.
D:
R:
Two stages
One stage
Two stages
Three stages
Valve Type
–
The hot water valve's position with no power applied to the valve.
D:
R:
NC
NC/NO (normally
closed/normally open)