Hitachi VRF

HITACHI VRF SYSTEMS

The Best Commercial Parts and Service

​Hitachi VRF Systems: Technology that leads to a whole new level of performance.

Hitachi is the world's third largest manufacturer of VRF devices.

Johnson Controls has invested $2.8 billion in buying 60% of Hitachi's Air-Conditioning division, bringing the best of both worlds to the North American market: unmet VRF innovation from a major VRF supplier through one of the most known manufacturers of traditional HVAC systems and controls.

Johnson Controls recently launched the second generation of VRF HVAC equipment for the North American market, the Hitachi Variable Refrigerant Flow (VRF) Gen II.

Why is Hitachi top 3 in VRF?

  • Unmatched efficiency: outstanding performance with an average energy savings of up to 39% compared to conventional HVAC systems for some applications.
  • High customization: versatility to configure a specific modular system according to each project’s exacting specifications, with options including heat pump and heat recovery systems and a variety of fan coil options.
  • Engineering freedom: allows designers to select ducted systems with long or short runs or, non-ducted systems that allow much lower clearance between building floors (and consequently reduce construction costs).
  • Whisper quiet operation: Amazingly quiet comfort, precisely delivering the right amount of heating or cooling to each area.

VRF Systems: The HVAC market's fastest-growing segment.

In the United States, Variable Refrigerant Flow systems are becoming increasingly popular as demand for zoning systems, sustainable solutions, and energy efficiency continues to grow. In fact, in the American HVAC industry, VRF systems are the fastest-growing segment.

Why?

VRF systems successfully balance building comfort and performance by supplying each room with the right amount of heating and cooling.

By using DC inverter scroll compressors to save energy and avoid frequent cycling wear and tear, VRF technology achieves this balance. Such compressors increase the efficiency of air conditioning by modulating the supply of refrigerant to each particular area to meet demand, and are the cabal for heat transfer from one area to another.

The new generation of Hitachi VRF: the most robust and energy-efficient HVAC system has just improved.

Hitachi VRF is building on game-changing technologies that make variable refrigerant flow systems the most versatile and energy-efficient HVAC solutions in the world.

Hitachi VRF Gen II offers increased performance, more development flexibility, new business opportunities and exceptional control with an extended, re-engineered equipment line and innovative technology.

Advanced technology allows cooling when outdoor ambient temperatures are as low as -10 ° F or as high as 122 ° F (-10 ° F – 75 ° F in simultaneous heating and cooling mode) and heating when outdoor ambient temperatures are -13 ° F to 59 ° F (-11 ° F – 59 ° F in simultaneous heating and cooling mode).

VRF Systems: The HVAC market's fastest growing segment.

  • In the ratings that matter most for VRF engineering, Hitachi VRF systems rank impressively high: simultaneous cooling and heating efficiency (SCHE) and integrated ratio of energy efficiency (IEER).
  • SCHE refers to VRF systems with characteristics of energy recovery. The ratio of total capacity (heating and cooling) of a system to effective power consumption is defined.
  • The SCHE ratings of Hitachi VRF systems are as high as 32.2.
  • IEER communicates cooling efficiency at different part-load conditions based on weighted operation.
  • The IEER ratings for Hitachi VRF systems are as high as 26.5.
  • The Coefficient of Performance (COP) ratio expresses a heat pump’s efficiency while in heating mode. Two specific ambient temperatures, 47 ° F and 17 ° F, are measured according to AHRI.
  • Hitachi has values up to 4.25 and 2.78 for COP 47 ° F and 17 ° F for COP.

Hitachi Water Source VRF Heat Pump: Premium Solution Where Space is Limited

The need for compact and exceptionally energy-efficient systems has increased, due to high-rise condos, apartments, and office buildings becoming smaller and more prevalent over time, requiring manufacturers to develop solutions that provide individualized comfort with maximum design flexibility.

Hitachi Water Source VRF heat pump is best where space is limited and the placement is difficult – such as coastal areas or extremely cold climates – where units are located indoors. Even in tight spaces, the installation of the system is simple, with options for top and front piping.

And it is not possible to compare flexibility with any other VRF system on the market. In order to meet the design needs, all VRF indoor units are fully compatible with new water source systems.

The unified 6-, 8-, 10- 12-, 14-, 16- and 18-ton single module units offer the flexibility to be used as heat pump or heat recovery systems, and are available in 208/230V and 460V.

  • Integrated Energy Efficiency Ratio (IEER) — 20.3 to 29
  • Heating Coefficient of Performance (COP) — 68°F: 4.3 to 6.3

Change-Over Boxes for Ultimate Refrigerant Flow: The Heart of VRF Systems Optimized

Hitachi provides a complete line of Change-Over Box options,  including Single-Port Change-Over Boxes in two sizes and Multi-Port Change-Over Boxes with 4,8 and 12 ports for maximum versatility in system design.

For you, that means:

  • Simplicity built-in: The Change-Over Box guides the refrigerant to the desired zone and indoor unit(s). The design does not generate condensate, therefore no drain or condensate considerations are required.
  • Noise control: There are a minimum number of valves in each box designed to minimize noise and condensation. This increases versatility in positioning.
  • Reliable performance: Valves in Change-Over Boxes work according to each zone’s cooling and heating demand, and an integrated box layout allows easy access to service if necessary.

Expanded Product Line for Unmatched Performance

14 DIFFERENT INDOOR UNITS AND FAR MORE FLEXIBILITY

  • Addintional design options
  • In medium and high-static indoor units, up to 25% increase in static tension
  • Available in additional capacities: 4-way cassette, wall-mount and ducted medium and high-static units

BOOST ENERGY EFFICIENCY WITH NEW INVERTER COMPRESSOR

  • Drive control modulates in smaller increments resulting in a 30% lower power draw at a system load of 30%
  • Standard dual inverter compressors in the outdoor units of 8, 10, 12, 14 and 16 ton for increased performance

FOR EXCEPTIONAL PERFORMANCE - REDESIGNED OUTDOOR UNITS

  • Increased air flow up to 23% and lower sound levels with new dual fan design
  • Up to 150% extended connection ratios for ALL outdoor unit capacities

INCREASE LAYOUT FLEXIBILITY WITH EXTENDED VERTICAL PIPING DISTANCE LIMITS

  • 360 feet of vertical piping distance

What’s New: Hitachi VRF Products and Updates

NEW DCAHLA DFS H-Link Gateway Leads To Exciting Changes in DFS Systems Layout and Configuration

The H-Link Gateway provides you with options for compatibility with VRF systems and VRF systems installed with BACnet’s VRF Smart Gateway for DFS visibility.

For a DFS standalone BACnet program, the H-Link Gateway can link directly with a VRF Smart Gateway, providing you with easier and better connectivity.

Hitachi VRF: The Best Choice For Multi-zone Buildings

Office Buildings

Research shows that temperature and humidity directly affect the productivity of employees.

The level of concentration of workers decreases and they become more likely to feel sleepy when a room is too hot. You have to deal with complaints and illnesses if a room is too cold.

In order to maintain comfort and concentration, Hitachi VRF provides the exact temperature.

Additionally, energy efficiency and quiet operation increase the value of the building and lead to LEED certification.

Healthcare

In hot environments, bacteria flourish, and incorrect temperatures jeopardize the safe environment of hospitals and clinics at risk.

It also causes stress for patients doctors, and staff, having an impact on either recovery or productivity.

Hitachi VRF systems slow the growth of bacteria and viruses and help to keep temperature and humidity at the optimal levels recommended by ASHRAE ensuring the safety of the environment

Education

Studies show that there is a significant difference in learning depending on environmental factors. Ambient temperature affects the ability of students to absorb information and concentrate on classroom activities.

If a classroom is too hot or too cold, the minds of the students keep reminding them to do something about it. This can lead to cognitive challenges and an impact on their motivation, if not also their health (with asthma, wheezing, etc.).

Hitachi VRF creates the perfect learning atmosphere and climate by maintaining temperatures in classrooms year-round between 71 and 77 degrees Fahrenheint.

Hospitality

In the hospitality industry, air conditioning is more important for reputation than you think.

Hotels that do not provide their guests with quality air conditioning have lower ratings and more complaints, 7 out of 10 guests say having a good AC system is a requirement.

You have most likely been a hotel guest before and had to deal with a load AC unit or didn't get cold enough, ruining a good night's sleep.

Hitachi VRF offers guests unmatched experience from the moment of check-in until it's time to travel back, keeping all floors at a comfortable temperature and providing the comfort of home away from home.

Government

Government buildings have an important effect on how tourists view the public system, illustrating the care and value given to the people.

Inadequate air conditioning temperatures are a sign of employee disrespect and visitor disservice, and lack of efficiency and noisy HVAC systems give the impression that the public system is outdated and sluggish.

Hitachi VRF welcomes every person – employees, public figures, and civilians – to the building and shows that the government is making smart investments, taking care not only of the public contribution but also of issues like global warming.

VRF Smart Gateway: Access at Your Fingertips and Simple BAS Integration 24/7

The new Johnson Controls VRF Smart Gateway is the solution if you need elite-level VRF integration with your building automation system

The VRF Smart Gateway was developed with BACnetTM Building Automation Systems (BAS) to quickly and easily incorporate Hitachi VRF technology.

All VRF Smart Gateway data is available 24/7 for each element throughout the network and accessible via a laptop, tablet or smartphone. VRF Smart Gateway uses Ethernet to discover all point data from Hitachi VRF Indoor and Outdoor Units.

For the first time ever, the entire system is accessible and controllable through the BAS interface, including all Hitachi VRF components.

Experts In Factory OEM Service

We've got your back from the initial design through installation and maintenance. Our technical support will answer all questions and provide fast and comprehensive guidance.

You will be provided with unparalleled customer support with us from an outstanding team of experts beginning at your local level and expanding to Hitachi’s global team.

We are committed to continuous training to keep up-to-date with all VRF market innovations, and dedicated to serving your equipment with the most advanced tools and techniques available, achieving the best possible results in the shortest possible time.

Yet our aim is to go further and equip you to efficiently design and install Hitachi VRF Systems. Therefore, through the Midwest Machinery University, we have several training classes available for you. Take a look!

Midwest Machinery University - Hitachi

Midwest Machinery and Hitachi have collaborated to provide you with the ultimate library of top-of-the-line tools and shortcuts to become a Hitachi VRF Systems expert. Here you'll find complete courses with training, seminars, spreadsheets, checklists, and fun videos to help you broaden your office knowledge and develop your field performance.

Full Courses

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Frequently Asked Questions

What is the average life expectancy of a VRF system?

According to the ASHRAE handbook, 15 to 20 years is the average life expectancy range for air-cooled VRF systems. 

Can VRF condensing units be installed indoors?

Yes, both VRF systems, air source or water source, can be installed indoors.

How is such excellent part-load efficiency possible with a VRF system?

The heat transfer over the coils in the indoor and outdoor units is improved when a VRF system operates at partial load. For example, the system will provide 50% of its maximum capacity, running at 50% efficiency, although using a system’s coil surface twice as large. This dramatically improves the system’s efficiency, especially at partial load.

Are oil traps required for Hitachi VRF systems?

Due to low compressor discharge, oil traps are not needed on VRF systems. To recover any oil discharge into the piping network, a regular oil recovery process is performed automatically.

Is continuous heating capability during defrost cycle possible with Hitachi VRF?

Yes. During the cold-weather seasons, VRF condensing units may accumulate frost buildup during heating mode. To combat this, a defrost cycle begins by temporarily switching a segment of the overall system to cooling mode, thus allowing discharge vapor to melt the accumulation of frost on the condenser coils. This ability ensures constant comfort for occupants within the building. 

When using the Hitachi VRF Smart Gateway for BMS integration, how much total equipment can be connected?

64 total VRF systems, up to 160 Indoor units, and up to 200 total Indoor and Outdoor units.

What are the consequences of incorrectly sized pipe diameters (either too large or too small)?

The ability to return oil is affected, which can result in long-term compressor failure. On the flip side, if the diameter of the piping is too low, there may be issues with capacity reduction and issues with pressure could occur.

What is the maximum distance between condensers and evaporators for vertical piping?

The maximum vertical distance is 360 ft. when the outdoor unit is located above the indoor unit.

For branch/unit isolation are valves required or recommended?

Generally speaking, to accommodate future unit repair or replacement it is recommended to install isolation valves.

If needed, can the VRF system energize an ancillary heat source?

Yes. For backup, emergency or supplementary heating purposes, an ancillary heat source, such as an electric duct heater or baseboard heat, can be energized.

What are the lowest recorded ambient operating temperatures for the latest VRF generation for simultaneous heating/cooling and heating modes?

Cooling: -10o
Simultaneous heating and cooling: -10oF
Heating:-13oF

When ambient temperatures are outside the published range, will the Hitachi VRF system experience a fixed, temperature-based shutoff?

No. Unlike others, although at a derate, Hitachi VRF will continue to operate outside the published range Nevertheless, if environmental pressures are surpassed for extended periods of time, the systems may eventually reach conditions where the outdoor device is stopped for safety on a high or low pressure sensor.

When a power failure happens on-site how will the VRF system restart operation?

All controllers have a backup memory. After power restoration, units can restart in the mode prior to the power failure.

Can I lock out an individual VRF compressor in case of an emergency, if required?

Yes, individual compressors can be locked out.

Blog Posts and Podcasts

Contact Us

Are you working on a VRF-capable project? Would you like to meet or talk to one of our VRF Ninjas? Looking for parts or service for VRF? How about saving money and improving your system?

If you answer any of these questions with "YES," give us a shout! With Hitachi, we are ready to lead you into the future. To send us a message, use the form below, or call us at 636-537-1919.

We promise to reply in one business day.

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DUCT-FREE MINI-SPLIT SYSTEMS

Compact and Powerful Single Zone Air Conditioners and Heat Pumps

Bring More Comfort to More Places.

In HVAC, architectural changes like room additions and remodels have more impact than most people think. Most often, this impact includes the cost and trouble of installing ducts.

Well, that is no longer an issue. The Y Series Duct-Free Mini-Split energy-saving single-zone air conditioners and heat pumps are the ideal comfort solution for room additions, remodels and other rooms.

Besides eliminating the cost and hassle of installing ducts, they allow you to dial the exact temperature and humidity you need. These help to save up to 30 percent more power than central air conditioning systems by using no more than the energy needed to heat and cool the room and are much easier to install.

Easy Installation

Superb Energy Savings

Convient Control

Whisper Quiet Operation

Perfect for Single Room applications and IT Closets

Problem Rooms

You know how uncomfortable it can be if you've been in a room that's either "too hot" or "too cold." The Mini-Split Duct-Free transforms problem rooms into cozy spaces.

Room Additions

It doesn't have to be expensive to heat or cool new spaces. In reality, ducts can limit your freedom of layout. The Mini-Split Duct-Free is cost-effective, ideal for individual comfort.

Security Sheds

Attics and garage are less frequented places, and if there is no one there, it is a waste of energy to cool and warm the areas. The Duct-Free Mini-Split allows you to use air conditioning only when the room is in use.

IT Closets

The Duct-Free Mini-Split will add heating or cooling to an older home without changing its charming design or adding noise to the space.

DUCT-FREE MINI-SPLIT INVERTER HEAT PUMP

Flexibility and Discretion Like No Other

MULTI-ZONE WALL- MOUNT UNIT

  • Ideal for limited wall space
  • Comfortable sleep mode
  • Infrared remote controller
  • Four fan speeds
  • Turbo mode
  • Wired controller (optional)

4-WAY CEILING CASSETTE UNIT

  • Distributes conditioned air throughout large open spaces or small rooms
  • Multi-speed fan
  • 4-way air discharge
  • Simple installation with suspended ceilings
  • Remote control lockout

DUCTED UNIT

  • Concealed within open closet spaces or above suspended ceilings
  • Medium static pressure capability
  • Standard or optimal wired central controller
  • Decorative discharge grilles in the ceiling
  • Internal condensate drain pump

FLOOR / CEILING UNIT

  • Ideal for wall-limited spaces with a compact design
  • Swing louver
  • Wired controller
  • Comfortable sleep mode
  • Slim and unobtrusive, fit beneath windows
  • Remote control lockout

What’s New: Duct-free mini-split products and Updates

Question? Contact Us.