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 Home > Digital Systems > KMC Controls > BacNet Thermostat
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The award-winning FlexStat is a controller and
sensor in a single, attractive package that creates a
flexible solution to stand-alone control challenges or
BACnet network challenges. Temperature sensing is
standard with optional humidity, motion, and CO2
sensing. Flexible input and output configurations and
built-in or custom programming ensure that a variety
of application needs can be met. Such applications
include single- and multi-stage packaged, unitary,
and split systems (including high SEER/EER variable
speed packaged equipment), as well as factory-packaged
and field-applied economizers, water-source
and air-to-air heat pumps, fan coil units, central station
air handling units, and other similar applications.
In addition, an on-board library of programs permits
a single model to be rapidly configured for a wide
range of HVAC control applications. Thus, a single
“one size fits all” FlexStat model can replace multiple
competitor models.
A single BAC-120163CW, for
example, can be quickly configured for any of these
application options:
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Air handling unit, with proportional heating and
cooling valves, and with optional economizer,
dehumidification, and/or fan status
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Fan coil unit, 2-pipe or 4-pipe, proportional or
2-position valves, with optional dehumidification
(w/ 4-pipe option) and/or fan status
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Heat pump unit, with up to two compressor
stages, and with optional auxiliary heat, emergency
heat, dehumidification, and/or fan status
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Roof top unit, with up to two H/C stages, and
with optional economizer, dehumidification, and/
or fan status
FlexStats also provide the capability to customize the
standard library of sequences using a KMC programming
tool (BACstage or TotalControl). This enables a
local authorized KMC installing contractor to adapt
the standard library to the unique site needs and application-
specific requirements of a particular project.
BACnet over MS/TP communication is standard.
“E” versions, with an RJ-45 jack, add BACnet over
Ethernet, BACnet over IP, and BACnet over IP
as Foreign Device (for communication across the
Internet).
Features:
Interface and Function
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User-friendly English-language menus (no obscure numeric codes) on a 64 x 128
pixel, dot-matrix LCD display with 5 buttons for data selection and entry
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Multiple display options include selectable space temperature display precision,
degrees F/C toggle, rotation values, display blanking, hospitality mode, and
locked mode
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Built-in, factory-tested libraries of configurable application control sequences
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Integral energy management control with optimum start, deadband heating and
cooling setpoints, and other advanced features to assure comfort while
maximizing energy savings
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Schedules can easily be set uniquely by the entire week (Mon.–Sun.), weekdays
(Mon.–Fri.), weekend (Sat.–Sun.), individual days, and/or holidays; six On/Off
and independent heating and cooling setpoint periods are available per day
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Three levels of password-protected access (user/ operator/administrator) prevent
disruption of operation and configuration—plus Hospitality mode and Locked User
Interface mode offer additional tamper resistance
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Integral temperature and optional humidity, motion (shown in photo above),
and/or CO2 sensors
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All models have 72-hour power (capacitor) backup and a real time clock for
network time synchronization or full stand alone operation
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Models functionally replace most Viconics and other competitors’ products
Inputs
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Six analog inputs for additional configurable remote external sensors, such as
remote space temperature (with averaging, highest, and lowest options), remote
CO2, OAT, MAT, DAT, water supply temperature, fan status, and other sensors
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Inputs accept industry-standard 10K ohm (Type II or III) thermistor sensors, dry
contacts, or 0–12 VDC active sensors
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Input overvoltage protection (24 VAC, continuous)
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12-bit analog-to-digital conversion on inputs
Outputs
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Nine outputs, analog and binary (relays)
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Each short-circuit protected analog output capable of driving up to 20 mA (at
0–12 VDC)
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The NO, SPST (Form “A”) relays carry 1 A max. per relay or 1.5 A per bank of 3
relays (relays 1–3 and 4–6) @ 24 VAC/VDC
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8-bit PWM digital-to-analog conversion on outputs
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