This service manual provides comprehensive technical information for the RXYQ72-240PYDN and REYQ72-240PYDN series heat pumps and heat recovery units. These units are designed for efficient operation on a 60Hz power supply, utilizing R-410A refrigerant. Engineered for reliability and performance, they represent advanced climate control solutions for various applications.

The scope of this manual encompasses detailed maintenance procedures, diagnostic troubleshooting guides, and essential technical specifications. It also includes wiring diagrams and schematics to facilitate accurate understanding and repair. This resource is intended to assist owners, service technicians, and maintenance personnel in ensuring the optimal performance and longevity of these HVAC systems.