bryant 582K Perfect Humidity Adaptive Dehumidification System
Product Info
Features/Benefits
The New Bryant Legacy™ Line rooftop units (RTU) with Axion™ Fan Technology were designed by customers with integrated new technology to provide value added benefits never seen in this type of equipment before.
New major design features include:
• Patented, industry’s first efficient indoor fan system using Vane Axial fan with electric commutated variable speed motor. As compared to today’s typically used belt drive with forward curve fans, system provides reliable operation with:
– 75% fewer moving parts
– No fan belts, pulleys, shaft, and shaft bearings
– 40% more efficient than traditional belt drive forward curve fans
– Slow ramp up capability for better sound and comfort control
– Internal protection from phase reversal and phase loss situations
– High external static capability
– Slide out blower assembly design
• Reliable and highly safety protected 2 stage cooling with tandem scroll compressors technology, fully active evaporator coil, and mixed air temperature protection on all models
• New unit control board with intuitive indoor fan that uses simple dial and switch adjustments
• Reliable copper tube/aluminum fin condenser coil with 5/16 in. tubing to help reduce refrigerant charge and reduce weight versus prior designs 582/559K Legacy™ Line units up to 12.5 tons are specifically designed to fit on Bryant roof curbs that were installed back to 1989, which makes replacement easy and eliminates the need for curb adapters, changing utility connections or supporting curb overhang situations.
2 speed indoor fan motor system helps deliver IEERs up to 15.2. All models are capable of either vertical or horizontal airflow without dedicated models or field install kits. With “no-strip” screw collars, handled access panels, and more, the unit is easy to install, easy to maintain, and easy to use. Your new 7.5 to 12.5 ton Bryant Legacy Line rooftop unit (RTU) provides optimum comfort and control from a packaged rooftop.
Value-added features include:
• optional Perfect Humidity™ dehumidification system for improved part load humidity performance
• single point gas and electrical connections
• 7.5 to 12.5 ton models use fixed TXV refrigerant metering devices
• Scroll compressors with internal linebreak overload protection
• Units come with an easy access tool-less filter door. Filter track tilts out for filter removal and replacement. All filters are the same size in each unit
Installation ease
All Legacy Line units are field-convertible to horizontal airflow, which makes it easy to adjust to unexpected job-site complications. Lighter units make for easy replacement and aid in the structural approval process. Simple, fast plug-in connections to the standard integrated unit control board (UCB). Clearly labeled connections points to reduce installation time. Also, a large control box provides room to work and room to mount Bryant accessory controls.
Easy to maintain
With the new Axion Fan Vane Axial fan system and direct drive ECM motor, there is no longer a need to adjust or replace belts or pulleys as in past designs. This frees up maintenance, installation and commissioning time.
Easy access handles by Bryant provide quick and easy access to all normally serviced components. Our “no-strip” screw system has superior holding power and guides screws into position while preventing the screw from stripping the unit’s metal.
Sloped, corrosion resistant composite drain pan sheds water; and won’t rust.
Easy to use
The newly re-designed Unit Control Board by Bryant puts all connections and troubleshooting points in one convenient place. Most low voltage connections are made to the same board and make it easy to access it. Setting up the fan is simple by an intuitive switch and rotary dial arrangement. Bryant rooftops have high and low pressure switches, a new mixed air temperature switch, a filter drier, and 2-in. filters standard.
Axion™ Fan Technology
Direct drive Axion Fan Technology indoor fan system uses Vane Axial fandesign and electrically commutated motors. This new Vane Axial design over past belt drive systems has 75% fewer moving parts, uses up to 40% less energy and has no fan belts, blower bearings and shaft. Full fan and motor assembly also slides out for easier maintenance and service.
Streamlined control and integration
Units are compatible with conventional thermostat controls.
Operating efficiency and flexibility
The 582/559K rooftops meet the Department of Energy (DOE) 2023 efficiency standard, as well as ASHRAE (American Society of Heating, Refrigerating, and AirConditioning Engineers) 90.1-2019, IECC1 (International Energy Conservation Code) IECC-2018 minimum efficiency requirements.
Field convertible airflow
All Legacy™ Line 7.5 to 12.5 ton units are field-convertible to horizontal airflow, which makes it easy to adjust to unexpected job-site.
1. IECC is a registered trademark of the International Code Council, Inc.
Comfort control
Bryant’s patented Perfect Humidity™ dehumidification system is an all-inclusive factory-installed option on gas heating/ electric cooling and electric cooling/electric heat models. This system provides reliable, flexible operation to meet indoor part load sensible and latent requirements as well as multiple gas heat and electric heat sized to fit an array of applications.
Model number nomenclature
582K MODEL NUMBER NOMENCLATURE
559K MODEL NUMBER NOMENCLATURE
Options and accessories
Factory-installed options
Economizer (dry-bulb or enthalpy)
Economizers save money. They bring in fresh, outside air for ventilation; and provide cool, outside air to cool your building. This is the preferred method of low-ambient cooling. When coupled to CO2 sensors, economizers can provide even more savings by coupling the ventilation air to only that amount required.
Economizers are available, installed and tested by the factory, with either enthalpy or dry-bulb temperature inputs. Additional sensors are available as accessories to optimize the economizers. Economizers include a powered exhaust system to help equalize building pressures. Economizers can be factory-installed or easily field-installed.
Unit mounted CO2 sensor
The CO2 sensor works with the economizer to intake only the correct amount of outside air for ventilation. As occupants fill your building, the CO2 sensor detects their presence through increasing CO2 levels, and opens the economizer appropriately. When the occupants leave, the CO2 levels decrease, and the sensor appropriately closes the economizer. This intelligent control of the ventilation air, called demand controlled ventilation (DCV), reduces the overall load on the rooftop, saving money. It is also available as a field-installed accessory.
Smoke detector (supply and/or return air)
Trust the experts. Smoke detectors make your application safer and your job easier. Bryant smoke detectors immediately shut down the rooftop unit when smoke is detected. They are available, installed by the factory, for supply air, return air, or both. Optional Perfect Humidity™ dehumidification system Bryant’s Perfect Humidity dehumidification system is an allinclusive factory-installed option that can be ordered with any Legacy™ Line 582/559K*08-14 rooftop unit.
This system expands the envelope of operation of Bryant’s Legacy Line rooftop products to provide unprecedented flexibility to meet year round comfort conditions. The Perfect Humidity dehumidification system has a unique dual operational mode setting. The Perfect Humidity system provides greater dehumidification of the occupied space by two modes of dehumidification operations in addition to its normal design cooling mode.
The Legacy™ Line 582/559K*08-14 rooftop coupled with the Perfect Humidity system is capable of operating in normal design cooling mode, sub-cooling mode, and hot gas reheat mode. Normal design cooling mode is when the unit will operate under its normal sequence of operation by cycling compressors to maintain comfort conditions. Sub-cooling mode will operate to satisfy part load type conditions when the space requires combined sensible and a higher proportion of latent load control. Hot Gas Reheat mode will operate when outdoor temperatures diminish and the need for latent capacity is required for sole humidity control Hot Gas Reheat mode will provide neutral air for maximum dehumidification operation.
NOTE: Perfect Humidity system includes Low Ambient controller.
Thru-the-base connections
Thru-the-base connections, available as a factory option, are necessary to ensure proper connection and seal when routing wire and piping through the rooftop’s basepan and curb. These couplings eliminate roof penetration and should be considered for gas lines, main power lines, as well as control power.
Hinged access panels
Allows access to unit’s major components with specifically designed hinged access panels. Panels are filter, control box access indoor fan motor access.
Cu/Cu (indoor) coils
Copper fins and copper tubes are mechanically bonded to copper tubes and copper tube sheets. A polymer strip prevents coil assembly from contacting the sheet metal coil pan to minimize potential for galvanic corrosion between coil and pan.
E-coated (outdoor and indoor) coils
A flexible epoxy polymer coating uniformly applied to all coil surface areas without material bridging between fins. Coating process shall ensure complete coil encapsulation of tubes, fins and headers.
Pre-coated outdoor coils
A durable epoxy-phenolic coating to provide protection in mildly corrosive coastal environments. The coating minimizes galvanic action between dissimilar metals. Coating is applied to the aluminum fin stock prior to the fin stamping process to create an inert barrier between the aluminum fin and copper tube.
Condenser coil hail guard
Sleek, louvered panels protect the condenser coil from hail damage, foreign objects, and incidental contact.
Stainless steel heat exchanger (582K units only)
The stainless steel heat exchanger option provides the tubular heat exchanger be made out of a minimum 20 gage type 409 stainless steel for applications where the mixed air to the heat exchanger is expected to drop below 45°F (7°C). Stainless steel may be specified on applications where the presence of airborne contaminants require its use (applications such as paper mills) or in area with very high outdoor humidity that may result in severe condensation in the heat exchanger during cooling operation.
Convenience outlet (powered or un-powered)
Reduce service and/or installation costs by including a convenience outlet in your specification. Bryant will install this service feature at our factory. Provides a convenient, 15 amp, 115v GFCI receptacle with “Wet in Use” cover. The “powered” option allows the installer to power the outlet from the line side of the disconnect or load side as required by code. The “unpowered” option is to be powered from a separate 115/120v power source. The unpowered convenience outlet is available as a 15 amp factory-installed option or a 20 amp field-installed accessory.
Non-fused disconnect
This OSHA-compliant, factory-installed, safety switch allows a service technician to locally secure power to the rooftop. When selecting a factory-installed non-fused disconnect, note they are sized for the unit as ordered from the factory. The sizing of these do not accommodate field-installed items such as power exhaust devices, etc. If field installing electric heat with factory-installed non-fused disconnect switch, a single point kit may or may not be required.
Condensate overflow switch
This sensor and related controller monitors the condensate level in the drain pan and shuts down compression operation when overflow conditions occur. It includes:
• Indicator light – solid red (more than 10 seconds on water contact – compressors disabled), blinking red (sensor disconnected)
• 10-second delay to break – eliminates nuisance trips from splashing or waves in pan (sensor needs 10 seconds of constant water contact before tripping)
• Disables the compressors operation when condensate plug is detected, but still allows fans to run for economizer.
Power exhaust with barometric relief
Superior internal building pressure control. This field-installed accessory may eliminate the need for costly, external pressure control fans.
Fan data
GENERAL FAN PERFORMANCE NOTES
1. Interpolation is permissible. Do not extrapolate.
2. External static pressure is the static pressure difference between the return duct and the supply duct plus the static pressure caused by any FIOPs or accessories.
3. Tabular data accounts for pressure loss due to clean filters, unit casing, wet coils, and highest gas heat exchanger (when gas heat unit).
4. Factory options and accessories may effect static pressure losses. Gas heat unit fan tables assume highest gas heat models; for fan selections with low or medium heat models, the user must deduct low and medium heat static pressures. Selection software is available, through your salesperson, to help you select the best motor/drive combination for your application.
5. The fan performance tables offer motor/drive recommendations. In cases when two motor/drive combinations would work, Bryant recommends the lower horsepower option.
6. For information on the electrical properties of Bryant motors, please see the Electrical information section of this book.
7. For more information on the performance limits of Bryant motors, see the application data section of this book.
8. The EPACT (Energy Policy Act of 1992) regulates energy requirements for specific types of indoor fan motors. Motors regulated by EPACT include any general purpose, T-frame (three-digit, 143 and larger), single-speed, foot mounted, polyphase, squirrel cage induction motors of NEMA (National Electrical Manufacturers Association) design A and B, manufactured for use in the United States. Ranging from 1 to 200 Hp, these continuous-duty motors operate on 230 and 460 volt, 60 Hz power. If a motor does not fit into these specifications, the motor does not have to be replaced by an EPACT compliant energy-efficient motor. Variable-speed motors are exempt from EPACT compliance requirements.
Sequence of operation
General
The sequence below describes the sequence of operation for an electro-mechanical unit with and without a factory-installed EconoMi$er® X (W7220 controller). For information regarding a direct digital controller, see the start-up, operations, and troubleshooting manual for the applicable controller.
Electro-Mechanical Units with No Economizer
Cooling (two stage units)
When the thermostat calls for cooling, terminals G and Y1 are energized. The indoor fan will run at the low fan speed and the C1 compressor contactor (CC) is energized causing the compressor and outdoor fan to run. The low indoor fan speed is 50% or 60% of the user set fan speed depending on unit size. If additional cooling is needed, the thermostat will add the call for Y2. This will increase the indoor fan speed to the user set fan speed and energize the C2 contactor and second compressor for full compressor capacity. The outdoor fan is the same speed for Y1 and Y2.
When the thermostat removes the call for Y2 but leaves the Y1, the indoor fan will slow to the reduced percentage of the user set fan speed, the C2 contactor will de-energize, the second compressor will turn off, and the outdoor fan will remain on. When the thermostat removes the call for Y1 the compressor contactor will de-energize shutting down the compressor and the outdoor fan. When the thermostat removes the call for G, the indoor fan will turn off after the specific unit fan off delay.
NOTE: Per ASHRAE 90.1-2019 and IECC-2018 standards, during the first stage cooling operation the Unit Control Board (UCB) will adjust the fan motor speed to provide 50% or 60% of the total cfm established for the unit.
Gas Heating (582K units)
NOTE: Legacy™ Line units have either 1 or 2 stages of gas heat.
When the thermostat calls for heating, power is sent to W on the Integrated Gas Controller (IGC) board. An LED (light-emitting diode) on the IGC board turns on and remains on during normal operation. A check is made to ensure that the roll-out switch and limit switch are closed. If the check was successful, the induceddraft motor is energized, and when its speed is satisfactory, as proven by the flue gas pressure switch, the ignition activation period begins. The burners will ignite within 5 seconds. If the burners do not light, there is a 22 second delay before another 5 second attempt. This sequence is repeated for 15 minutes or until the burners light. If, after the 15 minutes, the burners still have not lit, heating is locked out. To reset the control, break 24 V power to the thermostat.
When ignition occurs, the IGC board will continue to monitor the condition of the roll-out switch, the limit switches, the flue gas pressure switch, as well as the flame sensor. 45 seconds after ignition occurs, assuming the unit is controlled through a room thermostat set for fan auto, the indoor-fan motor will energize (and the outdoor-air dampers will open to their minimum position). If, for some reason, the over-temperature limit opens prior to the start of the indoor fan blower, the unit will shorten the 45 second delay to 5 seconds less than the time from initiation of heat to when the limit tripped. Gas will not be interrupted to the burners and heating will continue. Once the fan-on delay has been modified, it will not change back to 45 seconds until power is reset to the control. On units with 2 stages of heat, when additional heat is required, W2 closes and initiates power to the second stage of the main gas valve. When the thermostat is satisfied, W1 and W2 open and the gas valve closes, interrupting the flow of gas to the main burners. If the unit is controlled through a room thermostat set for fan auto, the indoor-fan motor will continue to operate for an additional 45 seconds then stop. A LED indicator is provided on the IGC to monitor operation.
Electric Heating (559K units)
NOTE: 559K units are sold as cooling only. If electric heaters are required, use only factory-approved heaters. They will operate as follows.
Units have either 1 or 2 stages of electric heat. When the thermostat calls for heating, power is applied to G and the W1 terminals at the unit. The unit control will energize the indoor fan contactor and the first stage of electric heat. On units with twostage heating, when additional heating is required, the second stage of electric heat (if equipped) will be energized when power is applied at the W2 terminal on the unit.
Electro-mechanical Units with Factory-Installed EconoMi$er X
When free cooling is not available, the compressors will be controlled by the zone thermostat. When free cooling is available, the outdoor-air damper is modulated by the EconoMi$er X control to provide a 50°F (10°C) to 55°F (13°C) mixed-air temperature into the zone. As the mixed air temperature fluctuates above 55°F (13°C) or below 50°F (10°C) dampers will be modulated (open or close) to bring the mixed-air temperature back within control. If mechanical cooling is utilized with free cooling, the outdoor-air damper will maintain its current position at the time the compressor is started. If the increase in cooling capacity causes the mixed-air temperature to drop below 45°F (7°C), then the outdoor-air damper position will be decreased to the minimum position. If the mixed-air temperature continues to fall, the outdoor-air damper will close. Control returns to normal once the mixed-air temperature rises above 48°F (9°C). The power exhaust fans will be energized and de-energized, if installed, as the outdoor-air damper opens and closes.
If field-installed accessory CO2 sensors are connected to the EconoMi$er X control, a demand controlled ventilation strategy will begin to operate. As the CO2 level in the zone increases above the CO2 set-point, the minimum position of the damper will be increased proportionally. As the CO2 level decreases because of the increase in fresh air, the outdoor-air damper will be proportionally closed. For EconoMi$er® X operation, there must be a thermostat call for the fan (G). If the unit is occupied and the fan is on, the damper will operate at minimum position. Otherwise, the damper will be closed.
When the EconoMi$er X control is in the occupied mode and a call for cooling exists (Y1 on the thermostat), the control will first check for indoor fan operation. If the fan is not on, then cooling will not be activated. If the fan is on, then the control will open the EconoMi$er X damper to the minimum position.
On the initial power to the EconoMi$er X control, it will take the damper up to 2 1/2 minutes before it begins to position itself. After the initial power-up, further changes in damper position can take up to 30 seconds to initiate. Damper movement from full closed to full open (or vice versa) will take between 1 1/2 and 2 1/2 minutes. If free cooling can be used as determined from the appropriate changeover command (switch, dry bulb, enthalpy curve, differential dry bulb, or differential enthalpy), then the control will modulate the dampers open to maintain the mixed-air temperature set-point at 50°F (10°C) to 55°F (13°C). If there is a further demand for cooling (cooling second stage — Y2 is energized), then the control will bring on compressor stage 1 to maintain the mixed-air temperature set-point. The EconoMi$er X damper will be open at maximum position.
2-Speed Note: The EconoMi$er X controller will adjust the damper position as the Indoor Fan Speed changes, per its configured values.
Heating
The sequence of operation for the heating is the same as an electro-mechanical unit with no economizer. The only difference is how the economizer acts. The economizer will stay at the Economizer Minimum Position while the evaporator fan is operating. The outdoor-air damper is closed when the indoor fan is not operating. Refer to Service and Maintenance Manual for further details.
Optional Perfect Humidity™ dehumidification system
Units with the factory equipped Perfect Humidity system option are capable of providing multiple modes of improved dehumidification as a variation of the normal cooling cycle. The Perfect Humidity system option includes additional valves in the liquid line and discharge line of each refrigerant circuit, a small reheat condenser coil downstream of the evaporator, and variable-speed control of some or all outdoor fans. Operation of the revised refrigerant circuit for each mode is described below.
The Perfect Humidity system provides three sub-modes of operation: Cool, Reheat1, and Reheat2.
Cool mode — Provides a normal ratio of Sensible and Latent Cooling effect from the evaporator coil.
Reheat1 — Provides increased Latent Cooling while slightly reducing the Sensible Cooling effect.
Reheat2 — Provides normal Latent Cooling but with null or minimum Sensible Cooling effect delivered to the space. The Reheat1 and Reheat2 modes are available when the unit is not in a Heating mode and when the Low Ambient Lockout switch is closed.
Refer to the following figures for piping flow diagrams.
Guide specifications
Note about this specification:
This specification is in the “Masterformat” as published by the Construction Specification Institute. Please feel free to copy this specification directly into your building spec.
Gas Heat/Electric Cooling Packaged Rooftop
HVAC Guide Specifications
Size Range: 7.5 to 12.5 Nominal Tons
Bryant Model Number: 582K*08-14
Part 1 — (23 06 80) Schedules for Decentralized HVAC Equipment
1.01 (23 06 80.13) Decentralized Unitary HVAC Equipment Schedule
A. (23 06 80.13.A.) Rooftop unit (RTU) schedule:
1. Schedule is per the project specification requirements.
Part 2 — (23 07 16) HVAC equipment insulation 2.01 (23 07 16.13) Decentralized, Rooftop Units:
A. (23 07 16.13.A.) Evaporator fan compartment:
1. Interior cabinet surfaces shall be insulated with a minimum 1/2 in. thick, minimum 1 1/2 lb density, flexible fiberglass insulation bonded with a phenolic binder, neoprene coated on the air side.
2. Insulation and adhesive shall meet NFPA 90A requirements for flame spread and smoke generation.
B. (23 07 16.13.B.) Gas Heat Compartment:
1. Aluminum foil-faced fiberglass insulation shall be used.
2. Insulation and adhesive shall meet NFPA 90A requirements for flame spread and smoke generation.
Part 3 — (23 09 13) Instrumentation and control devices for HVAC
3.01 (23 09 13.23) Sensors and Transmitters
A. (23 09 13.23.A.) Thermostats
1. Thermostat must
a. energize both “W” and “G” when calling for heat.
b. have capability to energize 1 or 2 stages of cooling, and 2 different stages of heating.
c. include capability for occupancy scheduling.
Part 4 — (23 09 33) Electric and Electronic Control System for HVAC
4.01 (23 09 33.13) Decentralized, Rooftop Units:
A. (23 09 33.13.A.) General:
1. Shall be complete with self-contained low-voltage control circuit protected by a resettable circuit breaker on the 24-v transformer side. Transformer shall have 75VA capability.
2. Shall utilize color-coded wiring
3. Shall include a Unit Control Board to conveniently
and safely provide connection points for vital control functions such as: smoke detectors, phase monitor, gas controller, economizer, thermostat, and low and high pressure switches. Controller shall also provide an intuitive means to adjust the indoor fan speed through a simple switch and pot adjustment design.
4. The heat exchanger shall be controlled by an integrated gas controller (IGC) microprocessor. See heat exchanger section of this specification.
5. Unit shall include a minimum of one 8-pin screw terminal connection board for connection of control wiring.
B. (23 09 33.13.B.) Safeties:
1. Compressor over-temperature, over-current. High internal pressure differential.
2. Low pressure switch.
a. Low pressure switch shall use different color wire than the high pressure switch. The purpose is to assist the installer and service technician to correctly wire and or troubleshoot the rooftop unit.
3. High pressure switch.
a. High pressure switch shall use different color wire than the low pressure switch. The purpose is to assist the installer and service technician to correctly wire and or troubleshoot the rooftop unit.
4. Mixed air auto re-set temperature switch.
a. When return air temperatures get the critical point that can cause compressor reliability issues, this switch will shut down compression only until the temperature raise accordingly. Switch opens at 60°F (16°C) and closes at 65°F (18°C).
5. Automatic reset, motor thermal overload protector.
6. Heating section shall be provided with the following minimum protections:
a. High temperature limit switches.
b. Induced draft motor speed sensor.
c. Flame rollout switch.
d. Flame proving controls.
Part 5 — (23 09 93) Sequence of Operations for HVAC Controls
5.01 (23 09 93.13) Decentralized, Rooftop Units:
A. (23 09 93.13.A.) INSERT SEQUENCE OF OPERATION
Part 6 — (23 40 13) Panel Air Filters
6.01 (23 40 13.13) Decentralized, Rooftop Units:
A. (23 40 13.13.A.) Standard filter section:
1. Shall consist of factory installed, low velocity, disposable 2 in. thick fiberglass filters of commercially available sizes.
2. Unit shall use only one filter size. Multiple sizes are not acceptable.
3. Filters shall be accessible through an access panel with “no-tool” removal as described in the unit cabinet section of this specification (23 81 19.13.G).
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Documents / Resources
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bryant 582K Perfect Humidity Adaptive Dehumidification System [pdf] Instructions 582K, 559K, 547K, 581K, 551K, 549K, 582K Perfect Humidity Adaptive Dehumidification System, 582K, Perfect Humidity Adaptive Dehumidification System, Humidity Adaptive Dehumidification System, Adaptive Dehumidification System, Dehumidification System |