this is an essential HVAC humidifier repair part to have on hand during seasonal maintenance to restore the system to factory-spec humidification levels
If 24V is present at the valve terminals during the ignition trial but the valve fails to open
precision-molded elastomer sealing rings
consult the McDonnell & Miller technical manual for site-specific modifications
the unit is rated for both indoor and outdoor installations
Johnson Controls A28AA-28 Temperature Control Refrigerant this is an essential HVACTemperature Control, Two Stage, 2 SPDT Switch Action, 120 208 240 277 Vac, 30 110 Degree Setpoint Range, 3 1 2 Degree Differential Each Stage, 2 7 Degree Adjustable Differential Between Stages, 12' Averaging Bulb, 6' Capillary Length, Screwdriver Range Adjuster