A2L Heat Pump Quick Start Guide

This video is intended for licensed HVAC professionals only. Always follow local codes, manufacturer instructions, and safety standards. Improper installation can result in equipment damage, personal injury, or property loss. Use EPA 608 certification and A2L-specific training before working with R‑454B refrigerant systems. This video includes an overview of how to work with R‑454B refrigerant in a Heat Pump. The purpose of this video is to demonstrate key troubleshooting solutions for servicing HVAC products. All service should be performed by a qualified professional. This video is not intended as an installation instruction video nor is it a substitute for the product and accessory installation instructions. Only accessories approved for installation with each individual product must be used. The appliance used in this video is WSEHV Cold Climate Heat Pump 454B Hybrid and Air Handler. Additional Support Videos: RDS Kit Installation: https://youtu.be/SPYuV1JCjoU How to Calculate Static Pressure: https://youtu.be/J6dTolH2dOY What’s covered in this video: ✓ Installation of R454B Heat Pump with Furnace & Air Handler ✓ Dip switch settings for capacity, communication mode, operating modes, defrost, and noise reduction ✓ Leak sensor relocation for horizontal installs ✓ Charging instructions ✓ Crankcase heater check for cold weather startup ✓ Wiring details for air handler vs furnace setups (H1/H2, D wire, J39 jumper) ✓ CFM adjustments after static pressure calculation 00:00 Intro 00:08 About System 00:40 H1/H2 Terminals 01:02 Retrofitting 01:33 Horizontal Applications 01:57 Dip Switch Settings 05:40 System Charging 05:57 Crank Case Heaters 06:34 Furnace Install Requirements 07:14 Air Hander Install Requirements 08:29 Wiring Schematic Explained