Mitsubishi Electric Zubadan Power Inverter R32 Series for Commercial Use

When speed, efficiency, and reliability matter, the Mitsubishi Electric PUZ-ZM R32 Zubadan Power Inverter Series brings advanced technology into commercial HVAC fit-outs. This range combines the benefits of R32 refrigerant with flash injection and extended pipe lengths, making it a go-to choice for large offices, retail, hospitality, and multi-tenanted developments.

Read on for detailed product specs, install advice, sales-oriented Q&A, and practical guidance for integrating the Zubadan range into commercial projects.

Explore our commercial air conditioning services:
https://www.climateworks.co.uk/commercial-air-conditioning

What Makes the Zubadan Series Stand Out

The Zubadan range delivers full heating capacity down to –3°C outdoor temperature, thanks to flash-injection compressor technology. It uses low-GWP R32 refrigerant, achieving seasonal efficiencies above 7.0—a significant win for sustainability and regulation compliance. The series also supports extended refrigerant piping up to 250 metres, vastly increasing installation flexibility in complex builds. [2]

Key features include:

• R32 refrigerant for lower environmental impact
• Full performance in cold ambient conditions
• Extended piping ranges from 60 to 250 metres
• Energy‐saving control functions like 2+1 backup, rotation, cut-in standby
• Customised setpoint ranges (14–30°C) for high-activity zones
• Remote diagnostic visibility via smart controller displays

Ranged Capacities and Technical Data

Using data from Mitsubishi Electric’s commercial documentation: [2][18]

• Outdoor units include models like PUZ-ZM60, 71, 100, 125, 140, 200, and 250—indicating maximum cooling capacities in thousands of BTU or roughly 17 kW to 73 kW.
• Efficiency: Seasonal energy efficiency ratios exceed 7.0 for cooling, making them among the most efficient in their class on the market. [2]
• Extended piping: Up to 250 metres supported—ideal for large commercial zones or segregated areas. [2]
• Cold-weather performance: Capable of maintaining rated heating capacity in ambient temperatures as low as –3°C. [2]
• Operational intelligence: Functions such as “2+1 backup, rotation, cut-in standby” increase uptime and reduce wear—valuable in critical commercial equations. [2]

Compatible Indoor Units for Commercial Fit-Outs

Zubadan units pair with the comprehensive Mr. Slim indoor portfolio:

• Wall-mounted (PKA) for office or clinic consultation spaces
• Ceiling cassette (PLA) for open-plan areas
• Ceiling-suspended (PCA) for high internal full-height areas
• Low and mid-static ducted (PEAD/PEA) for concealed installations
• Multi-position handlers (PVA) where service ducting is complex

This flexibility supports diverse commercial environments, including hotels, retail, communal workspaces, and healthcare facilities.

Key Installation Guidance that Drives Sales Confidence

Flash Injection and Cold-Climate Capability

Ensure the unit type is specified as Zubadan. Flash injection requires specific controller settings and power availability, but unlocks full heating even when outdoor temperatures drop.

Extended Piping Layouts

The ability to run pipework 250 metres long allows for centralized plant areas, split-level buildings, or installations behind hoarding without multiple condensers.

Smart Control Functions

Enable “2+1 backup” and zoning controls during commission. Clients benefit from resilience and reduced plant downtime—selling points for facilities teams.

Adjusted Set-Point Range

Use the extended cooling range (14–30 °C) for high-activity areas such as fitness suites or kitchens, where standard systems often struggle to maintain comfort without overcooling.

Noise Management

These units typically run at sound levels around 49–52 dBA. For sensitive locations, low-noise mode activation (via remote or dip switches) is a helpful feature.

Power Requirements

These are three-phase power units. Confirm panel capacity and ensure wiring meets spec for high starting currents, especially on larger 140–250 models.

Installation & Product Q&A (Sales-Focused)

Q: My client needs reliable heating for cold shafts in a winter fit-out—can the Zubadan R32 deliver?
Yes. The Zubadan series maintains rated heating capacity at −3 °C, making it ideal where conventional systems lose capacity in frost.

Q: Cabling and pipe runs are tight across the plant deck—how can this system adapt?
With 250 m of permitted piping, you can run from a central plant location and cascade into separate zones with minimal module count.

Q: My client wants system backup—can we achieve redundancy without mirrors of every component?
Yes. The “2+1 backup” mode switches to a standby compressor if the primary fails, giving downtime protection without doubled resources.

Q: We need a system that can adjust setpoints for different operational activities—does the Zubadan offer this?
Zubadan supports a cooling set range from 14–30 °C, adjustable via installer controller or BMS, accommodating a wider thermal preference based on activity zones.

Q: Aesthetic screens are tight. How quiet can this be made?
Activate low-noise mode via a relay or timer. This reduces output by 3–4 dB—useful in rooftop positioning over occupied space.

Project Examples Showcasing Zubadan in Commercial Builds

Hotel Refurbishment – Winchester

A heritage site required improved heating with minimal exterior intervention. A PUZ-ZM140 unit delivered heat reliably down to −3 °C, feeding cassettes in the bar area and wall units in rooms. Backup mode assured uptime in guest zones.

Retail Mix-Use Outlet – Oxford

A PUZ-ZM200 unit with 200 m pipework supply to multiple retail pods. Extended piping and rotation control delivered energy savings and robust performance across different shopfront fit-outs.

Office Fit-Out – Central London

A PUZ-ZM100 unit serviced test labs requiring stable temperature, using extended set-point control from a smart wall controller. The installer also used rotation features to distribute wear across runs—not usually discussed, but a practical asset for building managers.

When Zubadan Beats VRF or Standard Heat Pumps

Choose Zubadan when:

• The building experiences wide temperature swings (e.g. cold stores, atria)
• Central resequenced plant layout simplifies load distribution
• A single-zone or small multi-zone scenario needs efficiency and frost reliability
• Extended pipe-runs present installation complexity challenges
• Backup coverage is needed with minimal infrastructure duplication

Related Pages

• Commercial air conditioning installation for large projects
  https://www.climateworks.co.uk/commercial-air-conditioning

References

[2] Mitsubishi Electric PUZ-ZM R32 “Power Inverter” Specs and Features (Extended piping, low ambient, backup functions)
[18] Mitsubishi Electric PUZ-ZM Deluxe Outdoor Unit Brochure (Extended compatibility, downloads)
[8] Mitsubishi Technical Info App – Zubadan Series
[0] Mitsubishi VRF Range Overview (Zubadan mention)
[7] Mitsubishi HVAC Product Range Details

Dr. Julian Carter
Dr. Julian Carter is a highly experienced thermal systems expert with over 15 years in the field, holding a PhD in thermal systems. His career spans academic research, consulting, and teaching, focusing on air conditioning and refrigeration systems. Dr. Carter bridges the gap between theoretical advancements and practical applications, providing expert insights to organisations like ClimateWorks, where his guidance informs decision-making and industry best practices. Notably, he has worked on international projects with organisations such as Daikin Industries, the International Institute of Refrigeration (IIR), and the United Nations Environment Programme (UNEP). These collaborations addressed energy performance, sustainable refrigerants, and advanced cooling technologies. Currently a lecturer at Edinburgh University, Dr. Carter combines his expertise with a passion for educating the next generation of engineers and advancing climate control technologies.

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