Product data

Features/Benefits (cont)
Leaving-air temperature (LAT)
algorithm monitors the leaving- air
temperature to ensure safe and proper
operation of the HVAC equipment.
The LAT is constantly monitored and
system adjustments are made to
maintain LAT requirements.
Time Guardt compressor protec-
tion prevents excessive equipment
cycling by requiring a minimum down
time after a heating or cooling cycle
and a minimum heating and cool-
ing run time.
Staggered unit starting times of
multiple units upon power failure and
at the start of occupied times re-
duces unnecessary electrical demand
loads. The unique addressing of
thermostats automatically provides
this capability without additional con-
figuration requirements.
Serviceability and trouble-
shooting
Advanced diagnostics are built-in to
the VVTt Comfort System and con-
stantly verify proper system operation
and provide information to speed
system troubleshooting.
Fan and filter status allows service
needs to be pinpointed.
Heating and cooling mode error
set points continuously monitor
the supply-air temperatures. If the
supply-air temperatures exceed the
configurable error set points, then
an operating error is generated to
inform the service personnel of the
condition.
Error code display on each thermo-
stat provides a quick diagnosis of
system operating status.
Space comfort trending eases
troubleshooting. If space comfort tem-
perature trends indicate a loss of
comfort conditions, a comfort trend
error is generated. The comfort trend
error alerts the servicing contractor
to provide quick resolution.
Self-health test is performed by the
system to ensure proper system op-
eration and performance.
Simplified installation and
configuration
Multiple configuration access lev-
els of security protect system con-
figurations while providing occupant
access to space temperature and
operating schedules.
Easily accessible function menus
make system setup and configura-
tion intuitive, even for first time users.
System displays present the data in
a clear easy to read format, with
all data grouped in logical categories.
Start-up configuration category
contains essential start-up configu-
ration options for a quick system
setup. Typical default values are as-
signed to minimize start-up and
configuration time.
Full system configuration is done
at the thermostat. No additional
computer or start-up configuration
tools are required to complete system
installation.
Model number nomenclature
3