KMC Controls BAC-4000 User Manual

BAC-4 _ _ _ CW0003

1

3H/2C

3 3H/2C and economizer

0 Without humidity
2 With humidity

0 Without motion
2 With motion

AppStat for Heat Pump Units

Installation Guide

BAC-4000 Series BACnet Controllers

Applicable models

This installation sheet applies to AppStat controllers
for heat pump units. The model numbers for these
models end with "0003". Additional information for
the controllers can be found in the document

Installation, Operation and Application Guide for the
AppStat which is available on the KMC partners web

site.

Illustration 1—Heat Pump models

Planning for motion sensing

For models with a motion sensor mount the AppStat
on a wall that will have an unobstructed view of the
typical traffic in the coverage area. When choosing a
location, do not install the sensor in the following
areas.

Behind curtains or other obstructions

In locations that will expose it to sunlight or heat
sources

Near a heating or cooling inlet or outlet.

The effective detection range is approximately 10
meters or 33 feet. Factors that may reduce the range
include:

The difference between the surface temperature
of the object and the background temperature of
the room is too small.

Object movement in a direct line toward the
sensor.

Very slow or very fast object movement.

Obstructions as shown in the illustration Typical

motion sensing coverage area on page 1.

False detections may be triggered by:

The temperature inside the detection range
suddenly changes because of the entry of cold or
warm air from an air-conditioning or heating
unit.

The sensor being directly exposed to sunlight, an
incandescent light, or other source of far-infrared
rays.

Small animal movement.

Mounting the AppStat

For the most accurate performance, install the
AppStat on an inside wall where it can sense the
average room temperature. Avoid locations with
direct sunlight, heat sources, windows, air vents,
and air circulation or obstructions such as curtains,
furniture, etc.

Illustration 2—Typical motion sensing coverage area

AppStat for Heat Pump Units 1

The AppStat must not be:

Mounted on an exterior wall.

Mounted on or near an object with large a
thermal mass such as a concrete block wall.

Blocked from normal air circulation by
obstructions.

Exposed to heat sources such as lights,
computers, copiers, or coffee makers, or to direct
sunlight at any time of the day.

Exposed to drafts from windows, diffusers, or
returns.

Installation Guide

Exposed to air flow through connecting conduits

A

5.12 in.

130 mm

3.50 in.
89 mm

Inputs and

network

Power and outputs

Turn clockwise to remove
from base.

Turn counterclockwise
until the screw engages
the base.

Caution

Outdoor Air Temp.

Remote Space Temp.

Discharge Air Temp.

N.C. Fan Status

MS/TP

+B

A

RS

OAT

GND

DAT

ECON

G

Y1

Y2

RC

O/B

AUX/E

AO6

AO7

COM

24VAC

RH

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

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.

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.

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.

2.

Swing the AppStat away from the mounting base
to remove it.

3.

AppStat for Heat Pump Units 2

Route wiring for the AppStat through the

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—HPUinputs

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

Installation Guide