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Duotone terrace — saffron brief on the left, garden-folded ledger on the right.
This is the control board only
the 720 Series valve operates within a temperature range of -40°F to 175°F
This model is supplied without a harness
Specifically engineered for 2-way direct-acting gas shutoff valves with AC coils—including models 8040G021
eliminating the flame rollout or ignition sequence issues often associated with generic aftermarket controls
McDonnell & Miller 310462 Switch Assembly Els PW 29614 This is the control boardThe McDonnell & Miller 310462 (Model SWA 150S) is a heavy duty snap action switch assembly designed for precise low water cut off and pump controller transitions. This automatic reset assembly is a critical replacement component for Series 150S and Series 157S mechanical boiler controls. Built to manage steam boiler water levels up to a maximum operating pressure of 150 psi, the SWA150S provides reliable SPDT switching to prevent dry fire conditions