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<h2 id="refrigerants-used-in-pioneer-hvac-equipment"><strong>Refrigerants Used in Pioneer HVAC Equipment</strong></h2><p>Pioneer systems, as of August 2025, are using two refrigerants, R32 and R454B. The below table details which series of models use which.</p><h4 id="r32"><strong>R32</strong></h4><table style="width: 100%;"><tbody><tr><td style="width: 100.0000%;">WYT-17 (Diamante Essenza) High Wall Ductless&#xA0;</td></tr><tr><td style="width: 100.0000%;">WYT-FA (Quantum Fresh) High Wall Ductless</td></tr><tr><td style="width: 100.0000%;">PYR and PYZ (Recreational / RV) Packaged Systems</td></tr><tr><td style="width: 100.0000%;">QHD (Whole-Home Dehumidifier)</td></tr></tbody></table><p><br></p><h4 id="r454-b"><strong>R454-B</strong></h4><table style="width: 100%;"><tbody><tr><td style="width: 100.0000%;">WYT-20 (Diamante Pro) High Wall Ductless&#xA0;</td></tr><tr><td style="width: 100.0000%;">WYT-24 (Quantum Ultra) High Wall Ductless&#xA0;</td></tr><tr><td style="width: 100.0000%;">WYT-25 (Quantum Hyperformance) High Wall Ductless&#xA0;</td></tr><tr><td style="width: 100.0000%;">YNL-24 + MSI-24 (Quantum Ultra) Multi-Zone Outdoor and Indoor Units<br></td></tr><tr><td style="width: 100.0000%;">CYT-24 (Quantum Ultra) Ceiling Cassettes</td></tr><tr><td style="width: 100.0000%;">UYT-24 (Quantum Ultra) Floor-Ceiling Flex Consoles</td></tr><tr><td style="width: 100.0000%;">RYT-24 (Quantum Ultra) Ceiling Concealed Ductable</td></tr><tr><td style="width: 100.0000%;">DYC-18 (Vertex) Centrally Ducted Split Heat Pumps</td></tr></tbody></table>

Pioneer systems, as of August 2025, are using two refrigerants, R32 and R454B. The below table details which series of models use which.

What Refrigerants do Pioneer HVAC Systems Use?

General Technical Questions

HVAC Related General Queries

Do I need to restart my unit manually after the power goes out?

How can I fix my indoor air handler when the unit is not turning On?

How do I determine which breaker size and wire is needed for my system?

How does my system receive power?

What is the difference between 115V and 230V systems?

Electrical Related General Queries

Does the fan for my system shut Off in Cooling mode?

Does my system include factory pre-charged refrigerant?

How can I check the resistance of a Pioneer temperature sensor?

How can I fix leaks that are difficult to trace?

How can I locate the Pioneer model or serial number for my system?

How do I apply Pioneer Flare Leak Guard during installation?

Pioneer lineset diameter selection guide

What are the requirements for installing a mini split?

What type of oil is used for my unit?

Why did my ductless mini split system freeze on the inside air handler?

Are the linesets pre-flared when I buy a mini split?

Diagnosing and Preventing Crossed Wiring in Multi-Zone Systems

Sizing Systems & Short Cycling

Can a wall-mounted indoor unit be set onto the ceiling instead?

Can I operate the indoor unit without a remote control?

Can I turn Off the LED display for the indoor unit?

Can the lineset exit from the side of the indoor unit?

Does the indoor unit require anything extra in order to be mounted to the wall?

What is the ideal height for mounting indoor units?

What is the indoor unit’s weight and dimensions?

Indoor Unit

Are there recommended resources to find a professional near me?

Can the lineset be angled upward?

What gauge of wire is used for connections between the ductless mini split indoor and outdoor sections?

What hole saw size do I need for drilling walls to accommodate drain and refrigerant lines?

What is the cost and time spent on installing systems?

What torque wrench size do I need?

Where can I find wire-related information?

Who is permitted to install the A/C?

Installation

Why is my mini split leaking water improperly?

Plumbing and Drainage Queries

How can I access manuals and technical documents?

What is the telephone number to receive Tech Support?

Technical Support

Can a single-zone mini split be used with multiple indoor units?

Can I buy a Pioneer system that only offers cooling?

Can I order different lineset lengths?

Can I use a mini-split system with fewer indoor units than the outdoor unit's zonal capacity?

Do these split-type systems function as dehumidifiers?

Do you carry hyper-heat units (-22°F)?

Do you offer any discounts?

Do you offer pre-charged linesets?

How can I obtain spare parts?

How do I determine the unit size needed for my space?

How do I find an installer for my Pioneer Mini Split purchase?

How do I make a return?

How do I use my Pioneer Rewards Points when shopping?

How does the Energy-Star Federal Tax Credit work for Pioneer systems?

How do the units receive power?

What does “multi-zone” mean?

What is the difference between Inverter+ and Inverter++ systems?

What is the life expectancy of my system?

What is the Qualified Manufacturer ID for Parker Davis HVAC International?

What types of refrigerants are used in the new models?

Where can I learn more about IRA tax credits?

Which units are rated Energy-Star?

Why do I see multiple charges on my credit card?

Why does the discount code only say "SAMPLE" when trying to refer friends?

Are Pioneer Systems Able to Be Self-Installed?

Frequently Asked Questions

Process for returning an item

Refund eligibility requirements

Return an item

Return fees

Return policy

Start your return

Undeliverable or refused shipments

Returns and Refunds

Free shipping qualifications

Shipping and delivery details

What should I do if I receive an email saying my package was delivered, but I haven't received it?

Shipping and Delivery

Warranty coverage

Warranty durations

Warranty

Online Shopping

Error code E0

Error code E9/P0

Error code FY

Error code PA for multi-zone Diamante Ultra Series systems

Indoor unit displaying 0A code

Error Code Troubleshooting (Diamante Series)

Understand the difference between Diamante Pro and Diamante Ultra systems

Wall Mounted WYT-19 Diamante Pro Series

Wall Mounted WYT-22 Diamante Ultra Series

Technical Documentation (Diamante Series)

Connect your WYT-19 Diamante Series with the Pioneer Airlink App

Connect your WYT-22 Diamante Series with the Pioneer Airlink App

Integrate the Pioneer Airlink App with Apple's Smart Home Environment

Pioneer Airlink App

Diamante Series Systems (WYT-19, WYT-22)

Understand how Cased A-Coils interact with furnaces and other heating units

Technical Documentation (DYR Series)

Ducted Central Split DYR Series

Error code CL

Error code E1/EL 01/EL01

Error code E3/EH 03/F5/EC 07

Error code EC/EL 0C

Error code F4/EC51

Error code P0/PC00

Error code P1/PC01

Error code P2/PC02

Error code PC 03/PC03

Error code P4/PC 04/PC04

Interpret LCAC error codes

Error Code Troubleshooting (Quantum Series)

Connect CYB, RYB, and UYB systems with the NetHome Plus App

Connect WYS-20 and WYS-22 systems with the NetHome Plus App

NetHome Plus

Switch between °F and °C on the RG10 remote

RG10 Remote

CYB Ceiling Cassette

RYB Ceiling Concealed

WYS Wall Mounted

Technical Documentation (Quantum Series)

Quantum Series Systems (WYS/CYB/RYB/UYB/FYB)

Products

R454-B

Refrigerants Used in Pioneer HVAC Equipment

What Refrigerants do Pioneer HVAC Systems Use?Updated 2 hours ago

Refrigerants Used in Pioneer HVAC Equipment

R32

R454-B