Greenheck 382861 Motor Adapter 322838 752 The internal SPDT switch provides The internal SPDT switch provides versatile wiring configurations for various HVAC automation and industrial process controls System Safety: Prevents the escape of hazardous combustion byproducts and maintains the integrity of the boiler’s sealed combustion system mounting bolts and hardware should be sourced based on the specific motor and fan housing requirements found in the Greenheck technical manual this 382861 model provides the necessary structural integrity to bridge the gap between varying motor frame sizes and standard Greenheck blower configurations