When it is used as a basement model, a drop duct and instructions are available. Series C and D 393 Counterflow boxes are not interchangeable with the 394 Counterflow boxes. Before beginning installation, read these instructions carefully. When making a Counter-Flow or Basement installation, also read the separate instructions furnished with the additional equipment required. Install the furnace in accordance with the requirements of the local utility or authority having jurisdiction. The in

Type “S” for steam can be used in systems with a maximum work“ ing pressure of 15 psig. Type fiW” for water can be used in systems with a maximum working pressure of 50 psig. Installer; The boiler is shipped knocked down. Check rating piate for type of gas, input, voltage) etc,, to be sure that all equipment furnished meets the requirements of the installation. Read these instructions completely before beginning the installation. On the end of manifold fitting box there is a master copy of all