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• Carrier and Bryant offer zoning systems for residential and light commercial applications.

Comfort™ & Legacy™ Series Three-Zone System

• The system controls temperature and humidity and consists of individually sold components.
• A separate transformer is not needed; wires can enter from behind, above, or below.
• It offers independent temperature settings controlled by a 24v or Wi-Fi thermostat with up to five dampers per zone
• Each system controller includes a duct temperature sensor.
• Diagnostic LEDs and intelligent system diagnostics aid in troubleshooting.
• It allows four equipment cycles per hour for maximum equipment protection.
• Ten-year parts limited warranty is available with timely registration.
• The Comfort Series Three-Zone control panel options include: ZONECC3ZAC01 (1 Heat / 1 Cool), ZONECC3ZHP01 (3 Heat / 2 Cool), ZONEBB3ZAC01 (1 Heat / 1 Cool), and ZONEBB3ZHP01 (3 Heat / 2 Cool)

Comfort™ & Legacy™ Series Three-Zone System Features

• Has two separate controllers for AC and HP
• It uses conventional TSTATS and the Same Dampers as Other Carrier or Bryant Zone Systems
• Compatible with Rc Rh for Dual Heat Markets
• Has installer checkout routines
• Offers modulating damper control in emergency situations
• Has Damper fuse protection and high and low temperature limits
• Includes Time Guard override and compressor protection.
• Offers auto changeover, bypass setup routine, and staging time for energy savings
• It features automatic checkout with installer mode, override zoning switch, and timer override for serviceability.
• The system has: advanced energy savings algorithms, Remote access using your Apple or Android device
• Is compatible with your smart home and works seamlessly with Apple HomeKit and Amazon Alexa
• Includes an Outdoor Air Temperature (OAT) sensor and humidity display
• Has a five-year parts limited warranty

Dampers

• Up to five dampers may be used in each zone by electrically connecting them in parallel.
• By-pass dampers are available to prevent static pressure buildup and noise control.
• They can be mixed in round, slip-in, and rectangular configurations.
• Ten-year parts limited warranty is available with timely registration.

Performance™ & Preferred™ Series Four-Zone System

• Controls temperature and humidity in up to four zones in residential or light commercial applications.
• Features an innovative enclosure design with multiple wiring and mounting options
• The controller guides setup with simple steps and has an easy-to-read backlit LCD display indicating system status.
• Provides independent temperature settings for each zone controlled by a 24v or a Wi-Fi thermostat with up to five dampers per zone
• ELC (Electronic Limit Control) technology protects the system’s compressor and heat exchanger from freeze-up and overheating
• Offers color-coded LED indicators for easy troubleshooting
• Has a five-year parts limited warranty upon timely registration

Ease of Operation for the Four-Zone System

• Mix and match standard gas/electric and heat pump thermostats
• Offers staging based on supply air temperature and automatic changeover for maximum comfort
• A microprocessor manages complex decisions with adjustable staging time and temperature.

Configuration

• It features a simple step-by-step system setup guided by the controller and has an easy-to-read backlit LCD display.
• Has no dip switches, eliminating confusion

Troubleshooting

• The display indicates full system status with color-coded LED indicators for each thermostat.
• Has call and equipment call functionality
• Includes two-color LED indicators to show damper position and a red LED to indicate a blown fuse.
• There is no need for the customer to use the control panel.
• Offers selectable zone-1 priority for more customer control
• Emergency Heat can be enabled from the zone-1 thermostat
• Constant supply air monitoring from ELC ensures customer safety.
• Provides zone-specific ventilation by energizing the fan from any thermostat
• Compatible for 24V thermostat with single-stage thermostats

Installation

• It mounts with two screws and has quick-connect screw-less terminals and an innovative enclosure design with multiple wiring and mounting options

Infinity® & Evolution® Zoning Systems

• Control temperature and humidity in up to eight zones in residential or light commercial applications.
• Separate control of multiple zones maximizes efficiency and indoor comfort.
• Has a full-color touch screen, serves as the brain of the zoning system, and offers a default temperature and humidity sensor for Zone 1
• Users can operate, program, setup, monitor, and troubleshoot the system
• Manages each zone's airflow and adjusts for quiet comfort.
• Offers ten-year parts limited warranty upon timely registration.
• Works with variable speed systems and has four or eight zone configurations with an additional zone board
• Requires no LAT and HPT Sensors and no bypass damper
• Increases humidity control and is the easiest to use and most comprehensive controller in the business.

Infinity® & Evolution® Zoning Components

• One system consists of some or all of the following components: a full glass touch screen with 2.8 color display
• Has a small size (3.5" x 2.5" x 0.85") providing an intuitive user experience.
• Temperature accuracy displays outdoor temperature and indoor humidity plus the ability to change temperature or fan speed from the zone
• Offers ten-year parts limited warranty upon timely registration
• Provides the temperature reading to the Infinity system control in remote locations.
• Two-wire sensors are wired back to the Infinity damper control module.
• One should recommend running four wires for future smart sensor installation.
• Receives signals from the Infinity system control and turns on equipment and modulates the necessary dampers to maintain space temperature Major components connect directly to the damper control module.
• One damper control module serves up to four zones, cycling one zone at a time to minimize the system transformer load.
• Modulating dampers are available in round, rectangular, or slip-in sizes.
• Powered open and closed using a 24 VAC three-wire connection with non-spring return and specific drive timing
• Designed to draw less current, allowing up to five dampers to a single zone and can be mixed in different combinations
• The Zoning Systems control up to 8 zones independently.
• Systems provide separate temperature and fan speed in each zone with ComfortFan.
• Features smart recovery and smart sensors.
• Each zone can handle five dampers
• Zoning System Sensors include: ZONEXX0DTS01 LAT & HPT SENSOR and TSTATXXSEN01 OAT SENSOR

Why is zoning important?

• Address temperature differences greater than 5 degrees between floors or rooms.
• Customers are willing to pay for comfort, increasing profitability by over 20% and saving energy. -The primary objective of zoning is increasing home comfort.

Zoning System Design Factors

• A zoning system is only part of a complete heating and cooling system and a properly selected system has limited heating and cooling capacity.
• Ensure the air distribution system does not become too small.

Questions to Answer Before Zoning

• Assess homeowner goals for comfort and energy savings and conduct a site survey to make preliminary zone assignments
• Calculate the structure block load estimate and each zone's load estimate for heating and cooling.
• Size the heating/cooling equipment for the block load, not the zoning load
• Determine if a bypass is needed or allowed and explain the Duct Sizing Worksheet.

Assigning Zones

• It is essential to understand the goals before designing the system and addressing potentially unrealistic customer expectations.

Site Survey

• Provides the rough dimensions of each area or room.
• Indicates the location and relative size of doors, windows, and skylights.
• Identify large glass areas exceeding 30 percent of the wall area and any equipment adding sensible/latent load.
• Determines if any overhangs, trees, or buildings cast shade on the building's exposures.
• Pay attention to the home/building's orientation to determine solar heat load.

Retrofitting Installation Considerations

• Modify existing ductwork and dampers for additional airflow.
• Set mechanical minimum damper positions in some zones, and improve insulation to reduce heating/cooling demand.
• Utilize multi-stage heating and cooling equipment to match the load when only a limited number of zones require conditioning.
• Select an air handler/furnace to overcome high static pressure; ECM motors are a good choice.

Equipment Sizing

• Calculate block load estimates and zone load estimates for heating and cooling and use a reliable method to estimate.
• Calculate individual "room-by-room" heating and cooling load estimates (in Btu's) for sizing dampers and ductwork.
• Zone load estimates determine whether zone assignments make sense and size zone dampers and ductwork.

Duct System Sizing

• Oversizing of ductwork by 20-25% to handle varying conditions of airflow within the system is recommend.
• Some distributors/dealers design with as much as 30% oversizing as a built-in safety factor."
• "The "rule of thumb" is using friction rates of 0.1 (supply) or 0.08 (return) to design a duct system.
• Knowing this is based on 100 ft of equivalent ductwork and that factoring in fittings can cause Total Effective Length (TEL) to exceed 100 ft, potentially undersizing the ductwork, is important.

Types of System Bypass

• "Direct Return" - takes the excess supply air and directs it back into the return air side of the system.
• "Dump Zone" - takes the excess supply air and directs it back into the conditioned space."
• "Controlled Leakage" - type can divert the excess supply air and direct it into different zones.

"Direct Return" Bypass Features

A DIRECT RETURN" type takes the excess supply air and directs it back into the return air side of the system.

• Direct bypassing only slows getting too hot or cold
• Additional temperature sensors must be installed.
• Bypass ducts must be six feet from the equipment leaving the air temperature (LAT).

"Dump Zone" Bypass Features

• It takes the excess supply air and directs it back into the conditioned space.
• This "could cause the area you are using as the 'Dump Zone' to become conditioned resulting in a lack of Comfort for the homeowner."
• One must install the bypass duct connection a minimum of 6' away from the equipment or return.
• The “Dump Zone” has a risk of increasing air noise.
• This bypass reduces the effect of downtime.

"Controlled Leakage" Bypass Features

• Can divert excess supply air and direct it into different zones.
• “Controlled Leakage” bypassing may cause areas to become over-conditioned
• Set a minimum set screw position on the zone damper/s to continuously leak air.
• The "Dump Zone” could increase air noise. eliminates shutdown to temp.

Infinity™ & Evolution™ Airflows

• The Infinity and Evolution zoning systems do not facilitate bypass.
• These systems know the airflow capability of the ductwork and zones and control the blower to provide airflow and capacity for zones in demand.
• Purpose for a Bypass has always been to address noise;
• The system only registers this addition as a leak.

Installation Factors

• Use a user interface (thermostat) with room sensors in non-condensing areas.
• Zone Dampers and Zone Damper Module are in non-condensing areas (32 to 120 degrees).
• Zone Dampers are Ambient between -4° F to 158° F
• TXV (thermostatic expansion valve) is required at the indoor unit coil
• There should be proper duct and equipment sizing
• It is desirable because of the smallest zone handle the minimum airflow: A two-stage system on HIGH typically intakes 275cfm/ton, vs the average lowest 175 cfm/Ton.
• An important design tip is to use industry-standard design tools to help design the duct and zoning systems.

The Zoning Starting Point

• Is to match design with a strong heat loss/gain calculation for the structure.
• Larger equipment won’t always be more effective. Select equipment that is meant for more smaller air flow loads.
• After the calculation, determine the air flow, in cfm, for the zone. It is critical to deliver the correct amounts of airflow to each zone for an efficient system.
• Consult a professional for more instructions for HVAC systems, more specifically the airflow amount.

Zoning Components

• Smart Zoning Sensors (SYSTXZNSMS01)You choose the Brand of the Sensor when you power it up! & Remote Room Sensors (CEYSTXCCRRS01 SYSTYRRRRS01)
• INFINITY® & EVOLUTION® DAMPER CONTROL MODULE (SYSTXCC4ZC01 SYSTXBB4ZC01) & DAMPERS (8-IN. OR 24-IN.) (DAMPREC, DAMPSL, DAMPRND)
• Zoning Dampers & Accessories
• 45° Actuator for round dampers DAMPACT45DEG---R & 90° Actuator for rectangular dampers DAMPACT90DEG---R & Damper Actuator Cover DAMPACTXXCOV
• Round Dampers - DAMPRND08INC---B /Rectangular Dampers DAMPREC08X10---B/ Rectangular Barometric Bypass DAMPRECB08X14/ Round Barometric Bypass DAMPBAR10INC/ Slip---In Dampers Side mount & Bottom mount DAMPSLS08X10---

Planning the Installation

• Requires grouping rooms with similar usage, occupancy, and heat load.
• Separate different levels in a home into different zones and Existing ductwork.
• The installation is a retrofit with a system containing one or more existing and future duct systems.
• Existing duct systems may include limitations, dampers, or other existing problems.
• Damper Arrangement, Rectangular, and rectangular, will all be intermixed in any configuration.
• Comfort VS Energy Saving, save at different times, different losses and gains, different levels of desired temperatures, separated into separate zones
• Most systems include HVAC options and multi capability.
• In reality, The Zone-to-Zone system will be much less expensive or easier to be repaired.
• Many sections, which feature modulators.

Terms You Should Know

• ACCA Manual J - covers Load Calculations
• ACCA Manual D - covers Duct Design
• ACCA Manual ZR - covers Residential Zoning
• SMACNA - Sheet Metal and Air Conditioning Contractors