Modine 5H0547510021 Orifice R-407C The CCW rotation (lead end)

The CCW rotation (lead end) and band mount configuration streamline the installation process

the main valve diaphragm is the first part to inspect for pinholes or deformation

This assembly is designed for specific furnace chassis

The Honeywell ST9120C4054 fan control provides a 5-second post-purge and incorporates fixed cool fan-off delays to ensure complete thermal exchange

and unit heater series

Modine 5H0547510021 Orifice R-407C The CCW rotation (lead end)The Modine 5H0547510021 Orifice is a precision engineered Natural Gas Main Orifice designed for consistent gas flow regulation in commercial and industrial Modine heating units. As a critical component in the burner manifold assembly, this orifice is calibrated to maintain the specific manifold pressure required for efficient combustion and clean flame characteristics. Built from high grade, corrosion resistant brass, it ensures long term reliability