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Operating on 18-30Vac or 750mV (Powerpile)
the non-conductive sub-base and cover assembly mount directly to a standard 2" x 4" vertical junction box
if the fuse blows
As an open on rise switch action device
McDonnell & Miller 61-HD Low Water Cut Off R-410A Operating on 18-30Vac or 750mVThe McDonnell & Miller 61 HD (Part Number 140300) is a heavy duty mechanical low water cut off designed specifically for low pressure steam boiler applications. This head mechanism serves as a direct replacement component for Series 61 controllers, facilitating reliable burner circuit interruption when water levels drop below the safe line. Rated for a maximum steam pressure of 20 PSI, the 61 HD utilizes a high buoyancy float operated mechanism to
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