Check the listing for details. WEIL MCLAIN 510312166 Transformer and Relay 120/24V, SHIPS FREE TODAY!. Condition: New. Listed at 89.60 USD. Normal 0 Normal 0 This listing is for a new WEIL MCLAIN 510312166 Fan Control Center and Relay. Primary Voltage: 120V; Secondary Voltage: 24V; Switch Action: SPDT (single pole double throw); capable to handle up to a 3/4 horsepower fan blower motor. Need it immediately? We have your replacement Weil McLain Fan Control Center in stock, ready for same-day shipping with USPS Priority Mail (… not the cheaper, slow economy ground freight or third-party drop-shipping). Exclusive & FREE - we included easy-to-read trouble-shooting tips, instructions, and a neat bag with "must-have" hardware. (After over 40 Years of repair service - I may know what you're looking for!) Transformer and Relay, for easy installation on a 4″x 4″ junction box Line voltage connections pre-wired Energy limiting class II transformer design Color coded pre-stripped leads Low voltage connections on terminal board Comes with installation instructions.FREE Same Day Shipping with USPS Ground Advantage®, incl. Tracking/Delivery Confirmation via e-mail! Orders before 2 PM Eastern Time (EST). Delivery in just 1 -3 days (usually). We appreciate and thank you for your business. Have a blessed and beautiful day! Appliance and Air©.