Appendix A: VVT Zone II Points/Properties
VVT Zone II Controller
CARRIER CORPORATION ©2019
Installation and Start-up Guide
All rights reserved
66
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
– The delay in reheat coming on after the zone has a
heating demand. If the
Term Type
is
Parallel
, this allows the fan time to use plenum air
to heat the space prior to bringing mechanical reheat. If the
Term Type
is
Single Duct
,
we recommend that you set this value to 1 minute.
D:
R:
15 minutes
0 to 30 minutes
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:
105°F (40.6°C)
100 to 140°F
(37.7 to 60°C)
Max RH Override Position
– The maximum damper position that the RH function can
override the damper to. When active, the damper modulates to the temperature control
position, RH override position, or the IAQ override position, whichever is greater.
D:
R:
60%
0 to 100%
DCV Max Vent Damper Pos
– The maximum damper position that the IAQ function can
override the damper to. When active, the damper modulates to the temperature control
position or the IAQ override position, whichever is greater.
D:
R:
70%
0 to 100%
Filter Service Alarm Timer
– The amount of time a Parallel or Series 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
Setpoint Adjustment
– Enables the setpoint adjustment slider on the SPPL space
sensor.
D:
R:
Enable
Disable/Enable
Setpoint Adjustment Range
- The maximum amount that a user can adjust the setpoint
on the local ZS or SPT sensor.
D:
R:
2 °F (1.1 °C)
0 to 5 °F
(0 to 2.7 °C)
Heating Lockout Temperature
– Supplemental reheat is disabled if outside air
temperature exceeds this value. Supplemental reheat is enabled when the outside air
temperature falls below a fixed hysteresis of 2 °F (1.1 °C). This function is active only
if there is a valid network outside air temperature.
D:
R:
70°F (21.1°C)
-60 to 150°F
(-51.1 to 65.5°C)
Summary of Contents for VVT Zone
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