IO Hvac Controls iO-FAV-ENH-06 System 318518-761 The 0063231 is the lead-free

The 0063231 is the lead-free backflow preventer version (LF)

As a direct-match OEM York replacement part

There is no functional or technical difference

double-throw (SPDT) equivalent switching action where the main contacts open on a temperature drop (Open Low) while the reverse-acting auxiliary contact simultaneously closes to trigger an external alarm or BAS signal

The Johnson Controls P352PN-3 is a professional-grade electronic proportional pressure control designed for precise pressure management in commercial HVACR systems

IO Hvac Controls iO-FAV-ENH-06 System 318518-761 The 0063231 is the lead-freeFor residential contractors and HVACR technicians looking to maintain ASHRAE 62. 2 indoor air quality standards, the iO HVAC Controls iO FAV ENH 06 is a integrated solution for controlled performance. This fresh air ventilation system features a sophisticated micro processor logic panel housed under a single cover, preassembled with a 20VA transformer and a dedicated junction box for proper line voltage separation. The included 6 inch powered open 2