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Control Systems have always played an important part in the function of HVAC systems and for many years were centered around the safe and optimum performance of the hardware deployed. Every HVAC system is a closed-loop process, with inputs fed into control logic that determines the best course of action to achieve the desired output. Energy management and integration into Building Information Management saw the advent of energy-saving techniques like free cooling and night-time purge reduce mechanical cooling loads, whilst occupation data allowed greater holistic management of systems. These are well-recognized practices that are being refined using predictive weather data, additional focus on heat recovery and more environmentally energy sources. Control Systems have always played an important part in the function of HVAC systemsThe scope of the typical systems loosely described above are around the management of systems on one site and their operation and maintenance tends to be centered around that particular location. Multi-site Development & Management The UK temperature-controlled warehousing market tends to develop on a project-by-project basis that fosters the site-by-site focus of ongoing management and maintenance. For multi-site logistics operators and manufacturers and distributors with a multi-site portfolio. this approach has the following disadvantages: Disparate system KPI data collection and reporting Setpoint adjustment left to untrained operators who apply their individual assessment of compliance risk and often don’t consider the financial and operational implications of fine-tuning (or meddling) Enterprise-wide energy management is difficult to control Duplication of staff tasked with reporting and maintenance Inconsistency of measurement and interpretation Slow response to system failures Poor interpretation of operational processes that impact system efficiency Portfolio Management The distinction here is that a portfolio of temperature-controlled sites is managed centrally instead of independently. The enabler to the solution is the rapid Energy management and integration into Building Information Management saw the advent of energy-saving techniquesdevelopment of access control systems and data communication. The next step is vital in the customer engagement process; what do they want to see? What’s important and what is not? How often do they want to see it and in what format? From experience of going through this process this is a voyage of discovery for the warehouse operator in understanding the stakeholders in their business. Quality and compliance managers are the obvious starting point, facilities managers, finance managers who are tasked with reducing energy costs, customer service and the end customer. Alongside the KPI monitoring, Jet Environmentals created a hierarchy of alarms management that alerts the right people with system information, that triggers a sequence of actions driven by the data. Trends are monitored to predict where there might be a problem on the horizon so action can be taken before there is an issue. Faults and failures are alerted instantly and corrective action alerts sent to the right people. Conclusion The continuous development of HVAC controls and reliability of secure data connections has provided a means of improving performance, lowering cost and building trust in provider/user relationships. To be successful, the roll-out of such a project requires the willingness and collaboration of all parties and the groundwork defining stakeholder requirements is vital in defining a scope that meets expectations.
Many of us are spending more time at home. Given that work and home lives are becoming more intertwined, it makes sense to create a “comfort zone” in the place where people spend the most time. I am speaking about the benefits of zoned HVAC comfort control through duct-free split systems. Imagine offering your customers the ability to cool their bedroom at night without having to cool the whole house. Maybe they want to cool their home gym to 68 degrees while leaving the playroom at 76 degrees. Duct-free systems offer the ability to individually set preferred comfort settings for each individual zone or room in the home. Control the temperature, humidity and even the volume and direction of airflow, all according to personal preference. Imagine offering your customers the ability to cool their bedroom at night without having to cool the whole house Pandemic trends During the pandemic, one trend we are seeing is more consumers adding duct-free systems to spare rooms to function as a home office or the conversion of a garage for a home theater or as a social-distanced gathering place for family and friends. There are many options today to meet all of these needs and more. LG offers a variety of stylish, duct-free indoor units ranging from a smoked glass mirror finish to traditional white. You can offer your customers the ability to customize their space with the Art Cool Gallery, a unit that looks like a picture hanging on the wall, allowing them to add their own artwork or photographs. With so many options, there is no reason not to have the comfort you deserve. Each unit is powered by an energy efficient inverter with heat pump technology – some offering up to 28 SEER. The SEER calculates air conditioning and heat pump cooling efficiency. The higher the number, the less you will spend on energy costs. These systems – many of which are ENERGY STAR® certified – are built with cost-savings in mind, so whether it is low installation costs or reduced lifetime costs, your customers will be surprised to see the money they will save with duct-free HVAC technology. app technology “Smart” indoor units from LG come equipped with Wi-Fi capabilities and on some other models, this function can easily be added using a separate module. This allows control via the included wireless controller or from a smartphone. The free app for both iOS and Android is called LG ThinQ®. This is where we have a unique advantage over the competition. The app is the same communication platform used with LG home appliances and TVs. When a homeowner presses the “away mode” it will set all of the indoor HVAC units to their predetermined temperature, and at the same time other smart appliances in the home - refrigerator, dishwasher, washer and dryer - will be set to a low energy consumption mode. Imagine the savings! The app also allows the control of HVAC modes (Heating, Cooling, Dehumidification, Auto Changeover, or Fan Only), temperature, airflow direction/vane movement (up, down, side to side), fan speed and of course power (on/off). Users can control one or several units and each can be set up for group control. For instance, a parent might want to control all of the zones in the house, but only give children control of their room. Duct-free units give everyone their own personal level of comfort. There is also the option of installing these units in rooms that are typically warmer in the summer months or difficult to keep cool as temperatures rise. A connected home LG units can also be voice-controlled when paired with Amazon Alexa or Google Home For a more connected home, any of the LG units can also be voice-controlled when paired with Amazon Alexa or Google Home. This offers the convenience and freedom to use simple commands to set a desired temperature in various areas, such as: “Alexa, set the master bedroom to 70 degrees,” or “Alexa, set the office to heating.” So how does it work? The inverter compressor can adjust the speed of the compressor in 1 hertz level increments to match the load. This allows the outdoor condenser to operate at the minimum-required hertz level to meet the load and achieves a desirable energy efficiency at lower sound levels. The indoor unit also maintains greater cooling and wicks the moisture from the air to provide lower humidity levels. The reward is monthly energy savings on utility bills. These duct-free systems allow homeowners to efficiently make the most of all available spaces.
Manufacturers continue to make improvements in heat-pump technology, including higher efficiencies, contractor-friendly designs, and innovative extras like two-stage compressors that allow them to run at lower speeds and cut down energy use and homeowners’ bills. Below is a sampling of six of the latest products to hit the heat pump market. Nortek Global HVAC introduced the W-Series of air conditioning and heat pump equipment for residential and light commercial applications, completing its redesign of Gibson®, NuTone®, and Frigidaire® branded 1.5- to 5-ton, single-phase air conditioning units and heat pumps. The redesign offers contractors a ‘good-better-best’ strategy (the premium F-Series, the mid-range E-Series, and the economically-priced W-Series) to accommodate varying consumer price ranges. Coil-Protecting wire guard The W-Series heat pump is available in 14- and 16-SEER models. Standard features include Copeland scroll compressors and a liquid line filter-drier for field installation in an accessible position to facilitate easy periodic change-outs. It also has a coil-protecting wire guard that adds cabinet structural integrity and holds a plastic mesh in place to safeguard against hail and accidental contact damage, plus an anti-corrosive polymer drain pan with more drainage holes to eliminate potential standing water. On the unit’s exterior cabinet, above the refrigerant access port, is a weather-proof QR code called ‘Charge Me’ that can be scanned to access Nortek’s charge assist tool. “The new W-series of heat pumps recently introduced by Gibson, Frigidaire, and NuTone features a high-tech way to charge,” said Dave Garvin, product manager, Nortek Global HVAC. Variable Speed Heat Pump Rheem’s next generation Prestige® heat pump harnesses the power of the new EcoNet Smart Thermostat “The proprietary website helps account for subcooling, fixed orifices, thermostatic expansion valves, ambient temperature at time of charging, lineset length, and other variables that can trip up contractors when charging any heat pump brand.” The Rheem® Prestige® Series EcoNet®-Enabled Variable Speed Heat Pump features a contractor-friendly design, which means expanded valve space and triple service access, for fast and easy install and repairs. Corner-service access allows optimal access to internal components, while individual louver panels speed coil cleaning and cabinet reassembly. Plus, Rheem’s next generation Prestige® heat pump harnesses the power of the new EcoNet Smart Thermostat, which provides control, monitoring, and one-touch alert capability. Proper installation and reduced time “Rheem’s Prestige Heat Pump powered by our EcoNet Smart Thermostat keeps contractors in control,” said Ryan Teschner, product manager for Rheem Mfg. “From real-time alerts and system notifications to a charge mode capability, which allows for proper installation and reduced time on the job, Rheem’s heat pump increases job site efficiencies and reduces labor costs for contractors.” The hybrid electric Voltex® from A. O. Smith has an energy factor (efficiency based on the amount of hot water produced per unit of fuel consumed over a typical day) of 2.3, and is Energy Star® qualified. “Heat pump water heaters use electricity to pull heat from the surrounding air rather than generating their own heat,” said Brandon Stepanek, national field marketing manager at A. O. Smith. Reducing greenhouse gas emissions Carrier’s Hybrid Heat systems automatically switch between electric and gas heating “This means that they can be a logical choice for dedicated green home builders interested in enhancing energy efficiency. Because a heat pump water heater uses energy efficiently, it can save customers up to 10 percent on energy bills, which adds up to thousands of dollars over the life of the water heater,” he continued. “The significant reduction in electricity use also has a direct effect on reducing greenhouse gas emissions.” Carrier’s Performance™ Series heat pumps offer a range of efficiencies that start at 14 SEER and reach 17.5 SEER and up to 9.5 HSPF. Combining a gas furnace, an electric heat pump, and a compatible thermostat, Carrier’s Hybrid Heat systems automatically switch between electric and gas heating to optimize the efficiency of each fuel source, helping defend homeowners against utility cost fluctuations. They have Energy Star designation. Carrier indoor furnace “Our microtube coil technology saves space and provides lasting comfort with its corrosion-resistant construction,” the company stated. “In addition, some models include innovative extras, like a two-speed compressor for added benefits like higher efficiency and even, consistent comfort. When installed with a custom-matched Carrier indoor furnace or fan coil and a Côr® Wi-Fi® thermostat, our two-stage heat pumps can operate on low stage up to 80 percent of the time to keep airflow and temperatures even and consistent while adding humidity control during cooling operation.” Heating operation is rated down to minus 5˚F outdoor temperature Fujitsu General America Inc. recently debuted the RGLX Series, three medium-static pressure ducted indoor units for the single-zone Halcyon mini split line. They have sufficient static pressure to heat or cool a whole house. Heating operation is rated down to minus 5˚F outdoor temperature. The 12,000-, 18,000-, and 24,000-Btuh models are Energy Star qualified. V-Shaped heat exchanger Units are available in seven sizes ranging from 12,000 to 48,000 Btuh, with efficiency ratings up to 21.3 SEER. The evaporators are slim enough to fit most ceiling spaces, making them ideal for hidden installations, while the condensing units can be installed below a window or in a narrow space. The new models can be installed in applications that require static pressure up to 0.80 inches of water column and offer maximum piping lengths of up to 246 feet. A built-in drain pump with 33.5 feet of vertical lift comes standard. “The combination of the V-shaped heat exchanger, air stabilizer, and the energy-efficient DC fan motor results in high efficiency and quiet operation,” Fujitsu wrote in the product specs. Customized indoor comfort The Goodman GSZC18 Heat Pump features the next-generation Copeland Scroll™ two-stage compressor coupled with Goodman’s ComfortBridge® communicating technology to deliver up to 19 SEER and 10 HSPF performance. ComfortBridge ‘off-the-wall’ technology gives contractors more installation options and intelligent controls. It works with any thermostat, including single-stage ones. ComfortBridge constantly gathers data, making automatic adjustments for peak performance ComfortBridge constantly gathers data, making automatic adjustments for peak performance, using the minimum energy needed for consistent, customized indoor comfort. A companion CoolCloud™ app connects technicians wirelessly via Bluetooth to ComfortBridge. Advanced ComfortAlert™ Diagnostics constantly monitor the system, reducing failures and pinpointing trouble spots. “Our 18-SEER heat pumps provide high-efficiency, energy-saving indoor comfort with the ease of installation as compared to less sophisticated products,” said Cory Gottfredson, senior product manager, Outdoor Split Systems for Goodman. Compressor crankcase heater “We have incorporated ComfortBridge technology to optimize installation while allowing homeowners to use any thermostat. This truly enhances both operation and installation, freeing contractors from hassles and leaving money in the hands of homeowners where it belongs.” The scroll compressor inside the GSZC18 is designed with fewer moving parts, and the high-efficiency, two-speed electronically commutated condenser fan motor with advanced fan design provides quiet airflow. Other features include SmartShift® technology with short-cycle protection, a bi-flow liquid-line filter-drier, suction line accumulator, high- and low-pressure switches, coil and ambient temperature sensors, a transformer, compressor crankcase heater, high-capacity muffler, and a color-coded terminal strip for non-communicating set-up.
Nortek™ Air Solutions introduces the CDU1200, a 1,200-kW coolant distribution unit (CDU) that’s the single most powerful, compact CDU on the planet, and the newest addition to its ServerCool™ data center liquid cooling product line. The CDU1200’s small 58 (d) x 35 (w)-inch (1,475 x 900-mm) footprint supplies an industry-first 1.2-MW of cooling capacity in a density of 14.6-ft2 (1.3-m2) that helps attain optimum power usage effectiveness (PUE). The CDU1200 is a perfect new construction or retrofit liquid cooling solution for high performance computing (HPC) and enterprise data centers, as well co-location, corporate network edge, government, research and other data center formats. Superior Pumping Power In an age where liquid cooling is required to support growing chip power densities, the CDU1200’s kW/ft2 capacity is unrivaled when directly compared to competitor products. The CDU1200’s compatibility with existing ServerCool CDU’s, such as the CD6 300-kW floor mount and the CD5 50-kW rack-mount, enables modular growth of existing systems. The CDU1200’s superior pumping power also allows it to be placed outside of the white space. The CDU1200 offers two redundant 15-hp stainless steel pumps with many energy-efficient features The CDU1200’s highly-efficient heat exchanger technology thermally transfers primary loop cooling to the secondary loop’s liquid cooling circuit for distribution to IT rack cold plates. The CDU1200 offers two redundant 15-hp stainless steel pumps with many energy-efficient features including electronically-commutated (EC) motors and variable frequency inverters that efficiently modulate optimum performance flow rates for the system’s 320-gpm (1,211-L/m) capacity. Liquid Cooling Control Experience System water purity is optimized with a standard 50-micron washable ultra filter/strainer and an optional ultraviolet (UV) light biological contaminant sterilization system. The CDU1200 has an onboard programmable logic controller (PLC)-based microprocessor using custom-written, proprietary software based on ServerCool’s decades of liquid cooling control experience. The unit’s control infrastructure features compatibility and plug-and-play connections with Modbus The system’s full instrumentation of triple-redundant pressure transducers and temperature sensors offer unprecedented pinpoint control and monitoring of vital statistics, such as primary and secondary loop discharge/return temperatures, data hall temperature and humidity, pump PSI and many other critical parameters. Operation parameters are accessed from the CDU1200’s user-friendly, seven-inch (17-cm) color LED touchscreen HMI or a remote monitor. The unit’s control infrastructure features compatibility and plug-and-play connections with Modbus, BACnet™ and other building automation system (BAS) protocols. Computer-Automated Testing System The CDU1200 has a narrow Delta-T temperature which helps facilitate eligibility for the Green500 supercomputers list. It’s rated nominally with a 90°F (32°C) primary and a 7.2°F (4°C) approach Delta-T and exceeds 2.5-MW capacity with an approach of 14.4°F (8°C). Nortek’s commitment to the CDU1200’s quality control and short lead times is illustrated by a newly-built state-of-the-art, dedicated production line established at Nortek Global HVAC’s world-class 350,000-square-foot (32,516-m2) Dyersburg, Tennessee., manufacturing facility. The Demand Flow Technology-certified plant uses quality control and reliability processes, such as multiple checkpoints each with the unit’s CAD drawings on a computer monitor. A 100-percent computer-automated testing system prevents human error. Dripless Smart Connector Accessories The CDU1200 design also includes: Requires less life space than a CRAC when converting a data center to higher cooling and higher density liquid cooling; Robotically welded, corrosion-resistant ASIS 316 stainless steel is used instead of some competitors’ plastic piping that potentially melts or leaks easily under higher pressures. Piping infrastructure is subjected to a stringent series of factory pressure and hydraulic quality control testing; Maintenance is minimal and requires only periodic filter/strainer checks; Modulating actuator valve can control dew point and prevent condensation; Compatible with all brands of chillers, evaporative coolers, cooling towers and other chilled water central plant formats; User-definable LED alarms for leak detection/prevention and performance criteria; Fixed flow meters on primary and secondary circuits; Two-year standard warranty–one of the industry’s longest; Optional manifolds and dripless smart connector accessories fit all cold plate piping configurations. ServerCool products are ISO-9001:2015-certified and backed by Nortek’s proven 20 years of mission critical experience, design and customer support.
The introduction of this product series completes the final phase of an overall redesign of Gibson®, NuTone® and Frigidaire® branded 1.5- to 5-ton, single-phase air conditioning units and heat pumps. The air conditioner is available in 13-, 14-, and 16-SEER models, and the heat pump is available in 14- and 16-SEER models. Standard features include Copeland scroll compressors and a liquid line filter-drier for field installation in an accessible position to facilitate easy periodic change-outs. Coil-protecting wire guard Featured aesthetic and functional additions include a coil-protecting wire guard that adds cabinet structural integrity and holds a plastic mesh in place to safeguard against hail and accidental contact damage. The wire guard is secured by the top and three corner screws to promote quiet operation and easy disassembly for coil cleaning access. The series features a barcode on the interior control panel to scan and access all the particular unit’s Nortek website documents.