Our industry-leading VRF zoning systems are designed to be modular and configurable and provide you with many options to design best solution for your unique needs:
- Indoor units come in ducted and ductless variations and are designed to be placed just about anywhere you want in your interior spaces. Our ductless configurations free up valuable interior space so you can increase ceiling height or even get more usable floors without increasing your building envelope. And, our ducted systems have a low profile, reducing the amount ceiling space required to conceal the systems.
- Condensing units have a wide range of capacities depending on your needs and can utilize a number of cooling and heating energy sources. They are compact, quiet and simplify system design.
Unbeatable Zoning Ability
Intelligent indoor units have sensors to measure room air temperature at the return, or if the design requires it, air temperature can be measured at a remote thermostat. The ability to choose the measurement location allows for better air temperature management, maintaining the set point within 1 degree Fahrenheit (half of a degree Celsius). Some split and VRF system indoor units feature an i-see™ sensor accessory, which senses and compares air and floor temperatures, and then adjusts vane direction as needed to optimize the comfort within the space. Also, each indoor unit features linear expansion valves to ensure the precise amount of refrigerant is delivered to the zone.
Mitsubishi Electric Cooling & Heating VRF and split systems with multiple indoor (air-handling) evaporator units connected to an outdoor compressor unit can deliver just the right amount of refrigerant to precisely meet each zone’s load. Indoor units can be controlled to operate only in those occupied areas that need conditioning; indoor units in vacant areas can be turned off. By conditioning only the occupied areas, heating or cooling capacity is not wasted.
Diversity and Zoning
Certain VRF systems feature simultaneous cooling and heating. Also called heat recovery, these systems enhance the capabilities of zoning technology considerably by using a branch circuit (BC) controller to control energy. The BC controller can remove energy from one zone that doesn’t need it, and apply it to a different zone that does. For example, if an indoor unit in one room is calling for cooling and an indoor unit in another room is calling for heating, the BC controller can take the heat removed from the room operating in cooling and use it to warm the room in heating mode. The BC controller performs all the work, bypassing the compressor unit and saving electricity.
Most fixed-speed compressors in traditional HVAC systems only operate at 0% and 100%; in other words, fixed-speed compressors are either off or on, wasting energy when partial-load conditions prevail. And even if you have a traditional system with 2 or 3 stages, it doesn’t compare to the full-range variable capacity of the inverter-driven system that fully supports part-load operation.
In comparison, INVERTER compressors ramp up quickly, providing the energy necessary to achieve the cooling or heating demand of the zone. Then, working in tandem with system controls and sensors, the INVERTER compressor varies its speed to maintain the desired comfort level. Thus, the system performs at only the minimum energy levels necessary and does not waste electricity when partial-load conditions are present, which is 97% of the time in most locations.
The industry is beginning to recognize part-load operations-part-load systems are now being rated with a new procedure yielding an Integrated Energy Efficiency Ration (IEER) rating. This is a great improvement over the IPLV (Integrated Part Load Value) method. To obtain IEER ratings, the systems are tested at four different capacity levels and outdoor temperature conditions to provide a very accurate part-load measure. IEER will be the gold standard for part-load systems in the near future, and Mitsubishi Electric Cooling & Heating VRF systems, with the INVERTER technology, are designed to be among the best.
Mitsubishi Electric Cooling & Heating VRF and smaller split systems also save energy through zoning capabilities; INVERTER-driven VRF systems can be sized and designed to adjust for a building’s solar gain and the changing seasons. And certain VRF systems have the ability to simultaneously operate in cooling and heating-using the building’s own environment to save energy. These systems, also called heat recovery systems, use a branch circuit (BC) controller to control energy. The BC controller can remove energy from one zone that doesn’t need it, and apply it to a different zone that does. The BC controller performs all the work, bypassing the compressor unit and saving electricity. Click on the “Zoned Comfort” link for more information.
Lower Lifecycle Costs
The components in Mitsubishi Electric Cooling & Heating VRF and split system indoor and outdoor units are robust (CITY MULTI systems have a life expectancy of 15 to 20 years), and require significantly less maintenance than other systems. Many other systems require retro-commissioning and constant maintenance to preserve their installed efficiency, but VRF technology has all the logic built in. VRF system performance is constantly modified to maximize performance and comfort, and changing the filters is the only required periodic maintenance. Also, CITY MULTI W-Series (water source) models have lower maintenance costs than water-cooled chillers because water treatment issues are avoided.
M series and CITY MULTI indoor and outdoor units are ideal for applications where quiet is a necessity-libraries, places of worship, lecture halls, classrooms, bedrooms, living rooms, home theaters, and more. Sound pressure levels on an M series indoor evaporator unit range from 19 dB(A) at low speed to 49 dB(A) at high speed; sound pressure levels on CITY MULTI indoor evaporator units range from 22 dB(A) at low speed to 47 dB(A) at high speed. Compare those decibel levels to standard indoor sound levels, which are generally between 45 and 55 dB(A). M Series and CITY MULTI indoor units emit similar sound levels you’d expect from a whisper, the inside of a library, or the rustling of leaves in secluded woods. And the great variety of indoor unit styles gives you greater flexibility in deciding on the style, from wall mounted to ceiling concealed, to further minimize any unwanted sound.
M Series and CITY MULTI outdoor compressor units are also quiet-operating from 50 dB(A) (small capacity M series compressor units) to about 65 dB(A) (for the larger CITY MULTI modular units). Special care has been taken in the design of the outdoor units to compartmentalize the compressor so that sound is reduced at the source. Specially designed blades and multi-speed motors also reduce system operation sound. The low sound levels allow these outdoor compressor units to be installed near windows, on balconies or near rooftop amenities, giving you back usable space and minimizing disruption to your environment.
Many products use T-branches and headers for the ultimate in piping design flexibility. Modular systems with a variety of indoor and outdoor units can be put together for a system that is just right for your needs.
- Condensing Units (heat recovery, heat pump and water-sourced) offer vertical air discharge that allows units to be installed side-by-side in a single area, saving space and resources. They also offer long line lengths – up to 2,624 feet on R2 Series and 3,280 on Y-series (one way). Additionally, you don’t need space for compressor farms because the mechanical chases take up very little space.
- Indoor units meet your design and space needs – ducted or ductless, ceiling, floor, wall or vertical.
Maintain / Service
The network manages operation, monitoring, scheduling (daily, weekly, yearly) error email, personal browser, tenant billing and maintenance diagnostic information. There are a variety of remote controllers and timers to satisfy the exact level of tenant control on a zone-by-zone basis, while providing the ultimate in individualized control. You can also integrate CMCN with a Building Management System (BMS) using LonWorks or BACnet® for collective control of all building systems.
If you think you’d like a Mitsubishi Electric Cooling and Heating ductless air conditioning system installed in your house, or just want to know more about it, call us at 256-428-1983 – we’d love to help you!