Carrier’s new thermostat.
Carrier introduces first VRF line for rooftops
01 April 2019
Carrier has introduced a new rooftop unit-style fan coil for the Toshiba Carrier variable refrigerant flow (VRF) system that allows multiple rooftop units to be connected to one condensing unit and additional VRF fan coil units, thus optimising energy efficiency and comfort with a rooftop heating, ventilating and air-conditioning (HVAC) solution.
Building on Carrier’s legacy of innovation, the Toshiba Carrier VRF Rooftop is the first product line of its kind specifically designed using VRF technology, says a company spokesman.
He says the VRF Rooftop can utilise existing roof curbs and ductwork and can be installed without running refrigerant piping into the building. It also has economiser capability to bring in outside air, and when used in conjunction with carbon dioxide sensors, helps with building codes and standards compliance. When these features are combined with options like electric heat and horizontal or vertical discharge, rooftop replacements may result in minimal downtime and reductions in installation costs, the spokesman points out.
The Toshiba Carrier VRF Rooftop, available in 3-, 4- and 5-ton capacities, is described as being ideal for both new construction and retrofit projects in school buildings, strip malls, shopping plazas, open office spaces, and buildings with structure load requirements.
“The all-new Toshiba Carrier VRF Rooftop is a pioneer in the industry, having been specifically designed using VRF technology, and we are excited to offer our customers continued innovation in the rooftop segment with this unique VRF integration,” says Meredith Emmerich, managing director, Ductless & VRF Carrier.
Among other innovations, Carrier has also introduced the new ComfortVu BACnet thermostats, which help building owners and operators to maximise occupant comfort and increase energy efficiency.
These thermostats offer control of a building’s heating and cooling equipment from inside a facility, or from any BACnet-based building management system (BMS), including Carrier’s powerful i-Vu building automation system.
The wall-mounted BACnet thermostats are designed to work with commercial HVAC equipment, including rooftop units, heat pumps, fan coils, and unit heaters. On-board sensing options include temperature, humidity and motion detection, and integrated DIP switches make it easy to configure equipment type and sequence of operation.
They are available in two versions – Standard and Plus – and feature large backlit LCD displays and intuitive controls (push-buttons on the Standard, touchscreen interface on the Plus), putting occupants in direct control of their comfort.
A built-in clock and seven-day programmable calendar enable the BACnet thermostats to operate stand-alone or on a BACnet MS/TP network. The thermostat buttons and touchscreens can be locked down when the BMS is in control to limit occupant interaction and setpoint adjustments.
The new BACnet thermostats also offer online management tools when they are integrated with Carrier’s i-Vu building automation system.
Setpoints and occupancy status can be controlled directly through the thermostat or any BACnet BMS, making it easy to view, schedule, and manage the connected equipment from within the building or remotely at any time of day.
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