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Repeated tripping of the 426 PSI high-pressure limit typically indicates a dirty condenser coil
This Apollo 20-100 series gauge is rated for 125 PSI at a maximum temperature of 350F
Direct Cross-Reference: Seamlessly replaces 461002 and 461002-24VDC without mounting modifications
a rhythmic "thumping" or "squealing" sound
The dial allows for adjustments between 75
Resideo L8148E1299 Aquastat Relay Els PW 29614 Repeated tripping of the 426The Resideo L8148E1299 is a technical grade high limit Aquastat relay designed for immersion type hydronic systems. This 120Vac controller effectively combines system safety with operational switching, managing both the burner and circulator motors. Engineered with a vertical mount configuration, it provides a high limit operating range of 180F to 240F with a 15 degree fixed differential. This ensures consistent thermal cycling and reliable system
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