The Johnson Controls P499ACP-105 Pressure Transducer is a heavy-duty solution designed for precise pressure monitoring in commercial refrigeration and HVAC/R systems

It is fully adaptable with a four-way mounting orientation to fit tight manifold configurations

maximizing uptime for commercial and residential contractors managing hydronic zone valves

This kit is mandatory when converting an A-coil or slope coil fan coil to a horizontal right airflow position to ensure the air seal plate remains fully seated and airtight

Always verify the manufacturer's specification plate on the boiler

Lennox 14D89 Fan Switch 326058-756 The Johnson Controls P499ACP-105 PressureMaintain consistent head pressure and prevent evaporator icing with the Lennox 14D89 Fan Switch, a critical component for low ambient cooling operations. This genuine OEM Lennox replacement part is engineered to cycle the outdoor fan based on system pressure, ensuring the compressor operates safely even when outdoor temperatures drop as low as 0F. Operating on a 208 230V 60Hz electrical configuration, the 14D89 provides the precise switching required