Product data

Holiday scheduling for up to 18
holiday schedules with multiple days
per schedule allows flexibility and
adaptability to the needs of each appli-
cation. Daylight savings and leap
year scheduling is also included.
External timeclock control can be
used with the VVTt Comfort Sys-
tem thermostat to allow an external
clock control of the occupied and
unoccupied schedules.
Network occupancy control allows
the VVT Comfort System thermo-
stat to use its own occupancy
schedule, or to follow the schedule
of a network device. Schedules can
be used by many different devices
for ease of programming and
serviceability.
Control flexibility
Occupant control of set points
allows the VVT Comfort System to
satisfy all user comfort levels. Individu-
ally adjustable heating and cooling
set points maximize occupant comfort
for every scheduling requirement.
Unoccupied override allows the oc-
cupant to extend or return to the
occupied set points by overriding the
unoccupied schedule. The occupied
schedule can be extended for 1 to
4 hours after the unoccupied sched-
uled start time.
Temperature and time schedule
access is provided to suit the level of
comfort of every occupant.
Raised interface buttons improve
the look and feel of the interface
which make configuration changes
effortless.
Rotating display option provides
two different information displays to
suit the needs of the user. Set points
or zone temperature and set points
can be displayed.
Wide scope of capabilities for
all building requirements
IAQ (indoor air quality) sensor
continuously monitors space or system
air quality (CO
2
) and adjusts outdoor
air intake as needed. An alarm is gen-
erated if the IAQ level exceeds the
user-configured limits.
Pre-occupancy purge provides a
‘‘flushing’’ of the building one hour
previous to the scheduled occupancy
time.
Remote room sensor averaging
improves the total comfort of the
conditioned space. When large zones
exist with hot or cold spots, a total
of 4 remote room sensor readings
can be averaged.
Demand limiting integrates the
energy management functions of the
Loadshed module into the system
to optimize participation.
Tenant metering offers an easy way
to collect 3 different types of usage
data. The amount of time that zone
demand matches system mode, the
amount of time that zone demand
matches system mode during unoccu-
pied override, and the amount of
time that unoccupied override is active
can be collected by tenant metering.
The zone controller can collect the
amount of time that supplemental
heat is used.
Supplemental heat provides supple-
mental or zone heat independent of
the central HVAC unit. Supplemental
heat can be disabled when the out-
side air rises above a user-configured
lockout set point.
System performance is
optimized
System heating and cooling mode
lockout maximize the effectiveness
of system heating and cooling require-
ments by disabling heating or cool-
ing operation when the outside air
temperature exceeds the configurable
lockout set point.
Optimal start brings the conditioned
space to within occupied set points
prior to the occupied time period to
ensure occupant comfort.
Optimized staging maximizes first
stage heating or cooling performance
by suspending second stage opera-
tion when the first stage continues to
meet space temperature requirements.
Economizer operation optimizes
the use of outside air for cooling.
When the outside air temperature is
suitable for cooling, the economizer
operates to condition the space, main-
taining performance while reducing
the system requirement for mechani-
cal cooling.
Reliable equipment operation
maximizes unit dependability
System mode demand establishes
the minimum number of zones that
require heating/cooling before a sys-
tem heating or cooling mode is se-
lected. This unique sequence prevents
the cycling of equipment attempting
to meet troublesome requirements
of a single zone.
High- and low-temperature limit
protection ensures the supply-air
temperature is maintained within
a configurable unit-specific range.
When acceptable temperatures cannot
be maintained, heating and cooling
stages will be shut off to ensure safe
and proper operation of the
equipment. This avoids having to reset
the HVAC unit.
Table of contents
Page
Features/Benefits .................................................1-3
Model Number Nomenclature ...................................... 3
Accessories ...................................................... 4
Base Unit Dimensions ............................................. 5
Accessory Dimensions .............................................6,7
Component Selection Procedure .................................... 8
Performance Data ............................................... 9-11
Application Data ................................................12-19
Typical VVT System Installation .................................... 19
Guide Specifications .............................................20-23
2