Benefits of Mitsubishi Electric Two-Pipe VRF

Here at Advanced Products Group (APG) we’re committed to providing our customers the top HVAC technologies and systems. That’s why we offer Mitsubishi Electric CITY MULTI® VRF technology. Curious about VRF? Review our listing of VRF’s main benefits below:

Cost Savings:

Mitsubishi Electric offers simultaneous heating and cooling VRF in a two-pipe system while most of the industry still requires three pipes. The branch controller (BC) configurations eliminate the need for individual “selector” boxes in each zone, reducing costly and unnecessary proprietary fittings as well as the additional piping and electrical connections that are inherent in a three-pipe system. In addition, utilizing pre-insulated soft copper tubing between the branch controllers and the evaporators reduces labor costs and eliminates possible leak points associated with the use of standard hard copper.

Precise Control:

Two-pipe architecture allows indoor units to change temperature quickly from cooling to heating, or heating to cooling. The cooler/hotter refrigerant from one indoor unit moves to the branch controller and gets redistributed right there to another indoor unit. Since a three-pipe system’s refrigerant has to be moved farther to undergo the same redistribution process, the system responds more slowly, loses energy and costs more money to operate.

Energy Efficiency:

Energy efficiency is key in today’s marketplace. Mitsubishi Electric’s INVERTER-driven compressor technology uses the absolute minimum energy necessary to maintain personalized comfort levels while adjusting to part-load conditions, which occur most frequently. VRF systems consistently perform at 25 percent higher efficiency than conventional HVAC systems and help eliminate hot and cold spots.

Superior Technical Support:

Mitsubishi Electric has an unmatched technical support infrastructure across the U.S. As a part of its distributor network, APG is proud to offer comprehensive training on CITY MULTI VRF technology. Instructors provide lectures and hands-on training and are an open resource for students both in the classroom and out in the field.

Ease of Serviceability and Maintenance:

With the use of refrigeration ball valves on each circuit, CITY MULTI VRF systems have unmatched maintenance flexibility. An individual zone can be shut down, serviced and even relocated without affecting the functionality of the rest of the system. Through comprehensive controls – such as the CITY MULTI® Controls Network or Diamond Controls™ Solutions – technicians have remote access to the system and maintenance data which can be monitored and adjusted without the need for a third-party controls system. These features bring an owner piece of mind and build value for a servicing technician in meeting the needs of their customer.

Mitsubishi Electric VRF Provides Renovated Hotel Efficiencies and Flexibility

The Virginian Hotel will soon be the gem of downtown Lynchburg, Virginia. Originally built in 1913, the historic building has gone through many changes over the years. Formerly known as “The Grand Hotel of Downtown Lynchburg,” the property has also functioned as student residences for Liberty University and low-income housing. When the property went up for sale in 2014, George Stanley and his team at Cityscape, LLC decided to return the building back to its hotel roots. Once complete, this 114,000-square-foot hotel will feature 115 guest rooms, 10,000 square feet of conference and banquet space, a ballroom and several dining options including a rooftop restaurant, coffee shop and steakhouse.

With multiple functions for the space, a flexible HVAC system was key. The project team’s choice: Mitsubishi Electric Variable Refrigerant Flow (VRF) technology. Below we talk with George Stanley, owner, The Virginian Hotel, and Melinda Ruble, mechanical engineer, MDR Engineering, about the development and why Mitsubishi Electric VRF was the right selection for this project.

What is the concept of this hotel?
When we first explored the building, we knew it had potential. This hotel blends the historic with modern amenities. It’s also part of Hilton’s Curio Collection, which is their soft brand. They handle operations but we are our own unique brand.

Why VRF?
VRF is an extremely efficient system in how the units play off one another. One is heating and one is cooling – there’s an efficiency there. You don’t pay for the connection twice. We also didn’t have a lot of ceiling space for piping. Mitsubishi has a two-pipe system versus other market competitors that use three pipes. This feature was critical to the job. Having never used Mitsubishi Electric previously, I would absolutely use them again.

Did you receive any technical assistance regarding Mitsubishi Electric products?
Bill Warner at Aireco was instrumental in the selection and is as solid as they come. He was there to explain any questions we had and has given us full confidence in the system.

Apparently, the project team was torn between a traditional chiller/boiler four-pipe system and VRF before they made their final HVAC decision. What led to VRF?

There were a lot of historical constraints with this job – one of which involved maintaining ceiling heights to preserve the historic nature of the building. To have chilled water and heated water running through piping on a building this size was really going to be difficult. In my opinion, this naturally needed to be a Mitsubishi Electric VRF system.

Why is VRF technology an efficient choice for hospitality settings?

In a hotel, there are large areas that potentially are going to be unused at any time. It is unlikely to have all guest rooms booked 100 percent of the time. With VRF, you get the energy sharing – if you have one space that requires cooling and heating, you can have simultaneous conditioning that allows you to conserve energy and save money. You also get the zoning. As a crowd moves within a space, the system picks that up and allows the building to meet the conditioning demands.
Project Team

The Virginian Hotel is set to open mid-May.

Watch the project profile video.