2
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service,
maintenance, or use can cause fire, electrical shock, or other
conditions which may cause personal injury or property
damage. Consult a qualified installer, for information or
assistance. The qualified installer must use factory autho-
rized kits or accessories when modifying this product. Refer
to the individual instructions packaged with the kits or
accessories when installing. Follow all safety codes and
wear safety glasses. Read these instructions thoroughly
and follow all warnings or cautions attached to the unit.
Consult local and state building codes and Sheet Metal and
Air Conditioning National Association (SMACNA) for
special installation requirements.
Recognize safety information. This is the safety alert
symbol . When you see this symbol on the unit or in
instructions and manuals, be alert to the potential for
personal injury. Understand the signal words DANGER,
WARNING, and CAUTION. These words are used with the
safety--alert symbol. DANGER identifies the most serious
hazards which will result in severe personal injury or death.
WARNING signifies hazards
which could result in personal injury or death. CAUTION
is used to identify unsafe practices which may result in
minor personal injury or product and property damage.
Note is used to highlight suggestions which will result in
enhanced installation, reliability, or operation.
INTRODUCTION
The ComfortChoice System is the industry-leading two-way
verifiable demand management solution. Using this unique
solution, your utility can remotely adjust the operation and
temperature of your air air conditioning or heating system,
for short periods of time during periods of peak energy
usage. You have the Choice to override (cancel) the
adjustment if needed, always keeping you in ultimate
control of your Comfort. ComfortChoice is a two-piece
solution consisting of a programmable thermostat and a
utility I/O board equipped with two-way radio communica-
tions. The programmable thermostat offers programming
options that allow you to set different cooling and heating
settings that will change automatically in accordance with
schedules that you set up to fit your particular lifestyle.
•
Thermostat—Each installation has 1 thermostat. This
is the command center for the system.
•
Utility I/O board—The Utility I/O board communicates
to the thermostat and provides 24 Vac outputs to the
cooling/heating equipment. The on-board two-way
radio provides system access via wireless radio
frequency communications.
•
Auxiliary Load Controller—Optional component, not
supplied by Carrier, to facilitate utility auxiliary
curtailment or optionally control a residential device
remotely through combined wireless/internet capabil-
ity. Device is wired to the Utility I/O board.
INSTALLATION CONSIDERATIONS
These instructions cover the physical installation and start
up of the ComfortChoice system.
1. Install thermostat in non-condensing areas with ambients
between 30
°
F and 104
°
F (0
°
C to 40
°
C). Install the Utility I/
O board in non-condensing areas with ambients between
-4
°
F and 158
°
F (-20
°
C to 70
°
C). The auxiliary load
controller can be mounted outdoors if used with the
proper conduit fittings (follow local code requirements).
2. The use of separate isolated transformers is required if
the existing system transformer is less than 40 va. The
ComfortChoice system can be powered from the system
transformer in most applications. If the thermostat blanks
or the electronics turn off when the system is active
connect a separate (field supplied) 40 va class 2 isolation
transformer to the 24 Vac and C terminals to power the
electronics.
INSTALLATION
Step 1 — Check Equipment and Job Site
INSPECT EQUIPMENT—File claim with shipping company,
prior to installation, if shipment is damaged or incomplete.
Step 2 — Component Location and Wiring Considerations
All wiring must comply with national, local, and state
codes.
LOCATING UTILITY I/O BOARD
All wiring is run back to the ComfortChoice Utility I/O
board. Select a location near the furnace or fan coil where
wiring from the thermostat and the equipment itself can
come together easily.
The ComfortChoice I/O board and thermostat are approved
for indoor use only and should never be installed with
these components exposed to the elements. The Utility I/O
board may be installed in any area where the temperature
remains between -4
°
F and 158
°
F (-20
°
C to 70
°
F), and there
is no condensation. The cover must be installed to prevent
damage from other sources. Do not locate where it will be
accessible to children. Avoid areas in which the sound of
relays energizing on the Utility I/O board may
be an annoyance. The Utility I/O board should be mounted
with the antenna positioned vertically. Wiring access is
likely the most important consideration.
LOCATING THERMOSTAT
The thermostat should be mounted:
•
approximately 5 ft (1.5m) from floor.
•
close to the center-preferably on an inside wall.
•
on a section of wall without pipes or duct work.
WARNING
PERSONAL INJURY AND UNIT DAMAGE HAZARD
Failure to follow this warning could result in personal
injury and unit damage.
Disconnect power supply before routing wire.
!
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this caution may damage equipment.
To prevent possible damage to the Utility I/O board, do
not mount on plenum, duct work, or flush against
furnace or air handler.
!
CAUTION
!
