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
