AppStat For Fan Coil Units
2
Installation Guide
Exposed to air flow through connecting conduits
or empty spaces behind walls.
For models with motion sensing, see the topic,
Planning for motion sensing
.
Rough-in preparation
Complete rough-in wiring at each location before
mounting an AppStat. This includes the following
steps.
Install the supplied mounting base directly to a
wall, a vertical electrical box, or a box with a wall
plate kit.
Routing the connecting cable or cables from the
AppStat to the equipment it is controlling.
If required, install an appropriate wall plate kit.
Block leaks and airflow from conduits with
plumber’s putty or similar material.
If replacing an existing thermostat, label existing
wires for reference when removing the existing
thermostat.
Illustration 3—AppStat mounting base details
A
5.12 in.
130 mm
3.50 in.
89 mm
Input
s and
network
Power and output
s
Installing the AppStat
To install the controller on a mounting base, do the
following:
1.
Turn the Allen screw in the base of the sensor
clockwise until it clears the case.
Turn clockwise to remove
from base.
2.
Swing the AppStat away from the mounting base
to remove it.
3.
Route wiring for the AppStat through the
mounting base.
4.
Position the base with the embossed UP toward
the ceiling and fasten it directly to a vertical 2 x 4
inch electrical box. For horizontal boxes or 4 x 4
applications, use a wall plate kit. See
Installation
accessories
on page 4
for part numbers.
5.
Connect the wires for the AppStat to the
terminals in the mounting base.
6.
Place the top of the sensor over the top of the
mounting base and swing it down over the Allen
screw bracket. Be careful not to pinch any wiring.
7.
Turn the Allen screw counterclockwise until it
backs out of the mounting base and engages the
case.
Turn counterclockwise
until the screw engages
the base.
Caution
To prevent mounting screw heads from
touching the circuit board in the
controller, use only the mounting
screws supplied by KMC Controls.
Using screws other than the type
supplied may damage the AppStat.
Connecting inputs
The inputs for the AppStat are configured for
specific functions and do not require set up in the
field. Not all inputs are required for every model or
application.
Illustration 4—FCU inputs
Remote Space Temp.
Water Source Temp.
Discharge Air Temp.
N.C. Fan Status
MS/TP
+B
A
RS
WST
GND
DAT
COM
FAN-L
FAN-M
FAN-H
R
BO4
BO5
GND
AO6
AO8
AO7
24VAC
Remote space temperature sensor (optional)
Connect a 10kΩ, Type II thermistor temperature
sensor to the remote space temperature (RS) input
and ground (GND) terminals. The input includes
