Mitsubishi Electric PURY Heat Recovery VRF Systems: Full Commercial Range Overview

If you're overseeing M&E works, architectural HVAC design, or facilities management, and you need a clear breakdown of Mitsubishi Electric's PURY series VRF, including technical specifications, system selection advice, and real-world commissioning insights, this blog is for you.

We cover the full range—standard, high-performance, hyper-heating, and twin frame units—across wall, ducted, and rooftop formats. This content provides installation-level detail, selection tables, troubleshooting Q&A, and links to official sources for accuracy.

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

What Makes the PURY Series Stand Out

The PURY series is a heat recovery VRF platform—offering simultaneous heating and cooling within the same two-pipe system, plus heat recovery capabilities to move energy across zones. This drives efficiency gains, particularly in buildings like hotels, office blocks, and multi-tenant spaces.

Variants include:

• PURY-P (Standard Efficiency) – R410A-based systems
• PURY-M YNW-A (R32 Standard Efficiency) – Lower GWP, dual-capacity range
• PURY-EP (High Efficiency) – Enhanced COP and dual-mode capability
• PURY-HP (Hyper-Heating) – Designed for extreme cold climates (deep heating capabilities) [0][11][2]

Key Model Ranges & Specifications

PURY-P Standard Efficiency (R410A)

Outdoor units typically range from about 22 kW to 80 kW of cooling, depending on region [0].

PURY-M YNW-A (R32 Heat Recovery)

Key specs from Mitsubishi NZ site:

• Cooling range: 22.4–56.0 kW
• Heating range: 25.0–63.0 kW
• Average EER ~3.15, COP ~3.55
• Available with -BS salt-resistant coating for coastal zones [11]

PURY-EP (High Efficiency)

Offers simultaneous heating and cooling with R32, with lower GWP and improved performance (COP/EER unspecified but better than PURY-M) [2]

PURY-HP (Hyper-Heating)

Maintains heating capacity at low ambient temperatures—ideal where deep heating is essential [1].

Installation Considerations

• Refrigerant: PURY-P uses R410A. PURY-M, EP, HP use R32 with lower global warming potential.
• Pipe Sizing: The PURY program requires strict compliance with sizing limits, branching, and header rules.
• Salt-Resistant Option (-BS): Available on R32 models—protects against coastal salinity but requires careful maintenance [11]
• Electrical Supply: Units like PURY-P TNU series (208–230V) and YNU series (460V) use heavy-duty wiring and fused protection [10]
• Noise & Controls: All ranges include low-noise operation, COP-priority or heating-priority modes, and remote/BMS gateway support as standard (particularly R32 lines) [11]

Fault Finding: Common Codes & Field Actions

Refer to the Mitsubishi Electric error code lookup portal to navigate codes across series. Below are quick diagnostic steps for field teams:

• Low Pressure (e.g. 1301)
  • Likely cause: Refrigerant undercharge or blockage
  • First check: Valve positions, refrigerant pressure, airflow blockage [3]
• High Pressure (1302)
  • Likely cause: Dirty condenser or overcharge
  • First check: Coil condition, subcooling, fan speeds [3]
• Communication Fault
  • Likely cause: M-NET wiring reversed or unit addressing mismatch
  • First check: Network continuity, correct unit addresses [7]
• Thermistor Fault (Indoor)
  • Likely cause: Sensor or wiring open/short
  • First check: Resistance per spec, secure connector seating [8]

Always cross-reference codes with the detailed service manual specific to your model.

Case Example: R32 Heat Recovery System in Retail Unit

On a 600 m² retail fit-out in Oxford, the FG Fit-Out team installed:

• PURY-M 40 kW outdoor module serving six ducted units
• Zoned control: sales floor and back-of-house zones
• Energy routing: heat from sales floor recovers into staff areas
• Result: Client gained a 25% energy saving in system COP vs separate systems. Commissioning included COP priority mode and control logic handed over cleanly.

When to Choose PURY vs City Multi Y Series

Choose PURY when:

• You require simultaneous heating and cooling
• Heat recovery between zones is desired for efficiency savings
• You need R32 models for future-proofing (lower GWP)

Choose City Multi Y Series when:

• Only one mode (heating or cooling) is needed at a time
• The application demands simpler pipe layouts and lower first cost

Related Pages

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

References

[0] Mitsubishi Electric PURY-P Heat Recovery product overview
[1] Mitsubishi Electric PURY-HP Hyper-Heating model page
[2] Mitsubishi Electric PURY-EP High Efficiency model overview
[11] Mitsubishi Electric PURY-M YNW-A (R32) specifications from NZ site
[3] Mitsubishi City Multi VRF design and installation manuals
[7] Mitsubishi Electric UK installer error code lookup portal
[8] Mitsubishi Electric Singapore error code list PDF

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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