Allanson 2721-620 Transformer Els PW 17895 The Weil-McLain 635-100-003 Automatic Air

The Weil-McLain 635-100-003 Automatic Air Vent is a critical component for maintaining hydronic system efficiency by ensuring the continuous removal of trapped air

Integrating this HVAC outdoor sensor ensures the control board can calculate the correct reset ratio for various heating loads

0 Cv rating ensures minimal pressure drop across 3/4 sweat furnace valve installations

Engineered with a 5% low-heat input calibration

We recommend it for all outdoor bulb placements to protect against reflected heat and shifting sun patterns throughout the seasons

Allanson 2721-620 Transformer Els PW 17895 The Weil-McLain 635-100-003 Automatic AirThe Allanson 2721 620 is a heavy duty oil burner ignition transformer engineered specifically for Wayne E burners. This industrial grade unit operates on a 120Vac primary supply, delivering a consistent 10,000Vac secondary voltage at 23mA. Designed with a mid point ground configuration, it ensures stable arc performance and efficient combustion in demanding heating applications. Unlike solid state electronic ignitors, this traditional ferro magnetic