BAC-19xxxx FlexStat Installation Guide
2 926-019-02C
WIRING CONSIDERATIONS
See the
BAC-19xxxx FlexStat Sequence of Oper-
for sample wiring for dif-
ferent applications.
See the
for additional important wiring
considerations.
CAUTION
The BAC-19xxxx models are
NOT compatible with the
backplates of older BAC-
10xxx/12xxxx/13xxxx/14xxxx
FlexStats! If replacing an older
FlexStat, replace the backplate as
well.
• Because of the many connections (power,
network, inputs, outputs, and their respective
grounds or switched commons),
be sure wiring
is well planned before installation of conduit!
•
Make sure that conduit for all wiring has
adequate diameter for all necessary wiring.
Using 1-inch conduit and junction boxes is
recommended! Use external junction boxes
above the ceiling or in another convenient
location as needed to make connections that
run to the FlexStat’s junction box.
• To prevent excessive voltage drop,
use a
conductor size that is adequate for the wiring
length! Allow plenty of “cushion” to allow for
transient peaks during startup.
• Using
multiple conductor wires
for all inputs
(e.g., 8 conductor) and outputs (e.g., 12
conductor) is recommended. Grounds for all
the inputs can be combined on one wire.
MOUNTING
A
C
B
Terminal Blocks
on Backplate
Optional
Ethernet Jack
on Back of
Cover
Cover Locking Screw
Embossed “UP” Indicator
DIMENSIONS
A
3.874 inches
99.4 mm
B
5.124 inches
130.1 mm
C
1.301 inches
33.0 mm
Illustration 1—Dimensions and Mounting Information
NOTE:
For optimum temperature sensor
performance, the FlexStat must be
mounted on an interior wall and
away from heat sources, sunlight,
windows, air vents, and air circulation
obstructions (e.g., curtains, furniture).
Additionally, for a model with an
occupancy sensor option, install it
where it will have unobstructed view
of the most typical traffic area. See
Mounting Location and Maintenance
NOTE:
If replacing an existing thermostat,
label wires as needed for reference
when removing the existing
thermostat.
1. Complete rough-in wiring at each location prior
to FlexStat installation. Cable insulation must
meet local building codes.
CAUTION
Use only the mounting screw supplied
by KMC Controls. Using other screws
may damage the FlexStat. Do not turn
the screw in farther than necessary to
remove the cover.
2. If the cover is locked on the backplate, turn the
hex screw
in the bottom of the FlexStat
clock-
wise
until the screw (just) clears the cover.
(See Illustration 1.)
