Page 38 - Climate Control News Magazine July 2021

New products
Compact unit with advanced controls
SYSTEMAIR HAS ADDED a range of rooftop units operating on lower GWP refrigerant R32. The SYSAER R32 boasts a number of fea- tures including scroll compressors, energy- saving EC fans, advanced controls and low
noise levels in a small chassis of only 8.55m2. They are available in two models with cooling capacities of 106kW and 139kW and heating ca- pacities of 106kW and 142kW. They handle wide
operating limits from -15°C to +50°C OAT.
In cooling operation, a dehumidification function is now available to provide an even
better air quality and comfort.
In addition to the obvious benefits of R32,
the SYSAER R32 units are equipped with new
The SYSAER R32 boasts plenty of new features.
heat exchangers allowing a refrigerant charge reduction of 40 per cent.
Aware of the flammability of R32, a safety ventilation system has also been incorporated to ensure venting of the refrigerant gas to the outside of the unit in case of a leak.
The SYSAER R32 units have been designed with double skin panels (25mm glasswool), new EC indoor fans and compressors covered with sound jackets and closed in a “low noise box”.
They also feature a new advanced control system with, among others, Modbus protocols, an optimised defrosting logic, a high security envelope, Modbus control of the indoor fans and cloud connection.
38
VFD technology for energy savings, ROI
CLIMATECONTROLNEWS.COM.AU
VFDs are engineered to save energy.
EMERSON HAS INTRODUCED Copeland commercial HVACR variable frequency drives (VFDs).
They are specifically engineered to save ener- gy in a variety of demanding commercial and in- dustrial refrigeration applications.
Adding a VFD to control the speed of a com- pressor, evaporator or condenser fan in applica- tions such as a refrigeration rack or chiller can enhance overall system reliability and provide significant energy reductions, delivering a quick return on investment (ROI) for users.
When applying Copeland commercial HVACR VFDs to equipment, the same work gets done us- ing less energy: 15 to 30 per cent energy savings can be achieved compared to running a fixed- speed compressor or general duty motor.
When a drive is applied to a fan or pump, the motor speed for those applications can be modu- lated from 10 to 100 per cent. The efficiency from using a VFD is the result of better load matching, reducing the number of start/stop events and pulling down loads faster, which eliminates un- necessary energy consumption.
Emerson scroll & drives senior product man- ager, Joe Summers, said with variable frequency drive technology, the end user typically experi- ences improved temperature and humidity con- trol, reduced noise, and adaptable capacity for changing loads and weather conditions. “By adding a VFD, users will see a rapid return on investment in as little as a few months, as there is commonly no need to change existing equipment, resulting in faster and affordable ret- rofits,” Summers said.
“Copeland VFDs were designed with contrac- tor ease of installation and use as a top priority, with many features such as quick-start menus in- cluded to streamline commissioning and service.”
In addition, they integrate seamlessly with Emerson’s legacy E2 supervisory control, new Lumity E3 supervisory control, and Dixell refrig- eration controllers.
Emerson will be releasing two new commer- cial HVACR VFD product suites: the EVM and the EVH series. Copeland EVM VFDs cover from 1⁄2 to 30 horsepower, have single and three-phase input options, and are simple to use with Blue- tooth onboard connectivity.
Copeland EVH VFDs cover from 1 to 250 horsepower and all standard three-phase op- tions, including 575-volt. They have expanded control to handle applications requiring more functionality, such as centralized rack applica- tions, CO2 booster systems, advanced chillers and industrial refrigeration.
The VFD platform covers all Copeland com- pressors, including scroll, semi-hermetic and screw compression technologies.