Step 2—Component Location and Wiring
Considerations
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Turn off unit before routing routing control wiring or any
service operation. Remember, there may be more than one
power supply to unit.
All wiring must comply with national, local, and state codes.
LOCATING CARRIER 3-ZONE SYSTEM — All wiring is run
back to the Carrier 3-Zone System. Select a location near the
furnace or fan coil where wiring from each thermostat, each
damper actuator, and the equipment itself can come together
easily.
The Carrier 3-Zone System is approved for indoor use only and
should never be installed with any of its components exposed to
the elements. It may be installed in any area where the temperature
remains between 32° and 158°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. It may be
mounted in either vertical or horizontal position. Remember that
wiring access is likely the most important consideration.
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage.
To prevent possible damage to Carrier 3-Zone System, do not
mount control on plenum, duct work, or flush against furnace.
LOCATING THERMOSTATS — For proper operation, each
thermostat must accurately measure the temperature within its
zone.
For accurate temperature measurement, the following guidelines
should be followed:
Thermostat should be mounted:
•
Approximately 5 ft. (1.5m) from floor.
•
Close to the center of its zone, preferably on an inside wall.
•
On a section of wall without pipes or duct work.
Thermostat should NOT be mounted:
•
Close to a window, on an outside wall, or next to a door leading
to the outside.
•
Where it will be exposed to direct light and heat from a lamp,
sun, fireplace, or other temperature radiating object which may
cause a false reading.
•
Close to or in direct airflow from supply registers and return-air
grilles.
•
In areas with poor air circulation, such as behind a door or in
an alcove.
WIRING CONSIDERATIONS — All wiring in the Carrier Three-
Zone system may be unshielded. Ordinary thermostat wire is ideal.
Use 22 gage or larger for normal wiring. Lengths over 100 ft.
should use 20 gage or larger wire.
Each damper actuator requires 3 conductors. The connection to
thermostats and equipment (furnace or fan coil) could require as
many as 8 conductors for a multi-stage installation. The leaving air
temperature (LAT) and heat pump temperature (HPT)—(used with
heat pumps only) sensors require 2 conductors each.
Cables with excess conductors are acceptable. Cut off or fold back
and tape any unneeded conductors.
Plan the routing of wiring early to avoid possible problems later
on.
Remember all wires converge at the Carrier 3-Zone system, so its
location is important.
Step 3—Install Components
INSTALL CARRIER 3-ZONE SYSTEM
The Carrier 3-Zone System is designed so that wires can enter it
from behind, above, or below. Plan wire routing before mounting.
1. Open door to access eight mounting screw slots
2. Mount to wall using four screws and wall anchors provided.
3. Level and tighten screws.
INSTALL THERMOSTATS
1. Follow manufacturer’s supplied instructions for installing
thermostats.
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage.
Improper wiring or installation may damage the thermostats.
Check to make sure wiring is correct before proceeding with
installation or turning on unit.
Step 4—Install Zone Dampers
Proper selection and sizing of dampers is important for proper
system operation. Selection and sizing information is not provided
in this installation instruction.
If duct work requires multiple dampers for a single zone, up to 5
dampers may be wired in parallel.
Zone dampers may be installed in any position.
Install dampers so that actuator is visible for inspection and
accessible in the event it would ever need to be serviced. The black
mark on the end of damper shaft represents position of damper
blade.
The 45 degree actuators on round ducts have their mechanical
stops set at 45 degrees. DO NOT CHANGE THIS SETTING.
Doing so will allow the actuator to close when it is trying to open.
If an actuator is removed, it must be properly aligned when it is
reinstalled. Do this by rotating the actuator and the blade to their
closed positions and then tightening the actuator to the shaft. This
assures alignment at the closed position. (Pressing the blade
release button releases the motor and allows the actuator to be
manually turned.)
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage.
When dampers are located in an unconditioned space, con-
densation is likely to occur in cooling. Regular and severe
condensation will damage the actuator. To prevent conden-
sation and losses, all dampers and ductwork in unconditioned
space must be insulated or otherwise protected.
Whenever condensation might occur, it is recommended that
plastic actuator covers (Part# DAMPACTXXCOV) be used over
the actuator. These covers can help prevent condensation on
actuators by locking out ambient humidity. Insulation may be
applied over the cover to minimize heat transfer.
To install, place the cover over actuator and seal in place over the
surrounding insulation with duct tape on all four sides. Sealing
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Summary of Contents for ZONECC3Z
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