Is this for high-altitude installations

and 31 systems for precise electronic control

the Weil-McLain 383-500-390 includes the hardware necessary to secure the venturi and gas valve assembly to the blower housing

Multi-Refrigerant Compatibility: Rated for high-pressure service

leading to potential vacuum leaks

Copeland ZR16K5E-PFV-800 Compressor R-410A Is this for high-altitude installationsThe Copeland ZR16K5E PFV 800 is a high efficiency 1. 5 ton scroll compressor engineered for residential and light commercial air conditioning applications. Running on 208 230V single phase power, this hermetic unit is the direct updated replacement for the 921043 and serves as a reliable service solution for R 22 and R 407C systems. Designed with 70% fewer moving parts than reciprocating models, it features an optimized scroll and seal design that