Maxitrol M420B-1/2 Valve 30067439-890 The A22-1112 is a "No

The A22-1112 is a "No Off" model

Can the A421GBF-02 control both heating and cooling

Its robust design is a direct-fit solution for technicians looking to restore factory-standard demand defrost logic in residential and light commercial equipment

ensuring the inducer motor establishes proper draft before allowing the ignition sequence to proceed

the 2PNO (2-Pole

Maxitrol M420B-1/2 Valve 30067439-890 The A22-1112 is a "NoThe Maxitrol M420B 1 2 is a professional grade modulating gas valve engineered for atmospheric burners and indirect fired heating systems. Designed specifically for integration with the Maxitrol Selectra Series 94 and A200 electronic modulation systems, this 1 2" NPT valve provides precise, infinite flame adjustment to maintain tight temperature tolerances. The "B" designation indicates that both sides are fitted for low fire adjustment, allowing