Qmark Muh102 Wiring Diagram. Products range from specially designed. Web northstock | industrial / commercial ac units, heaters, and parts Operating instructions Qmark CBD Series HeavyDuty Commercial from www.manualsdir.com Web on models muh0521,muh0581, muh072, muh078, muh102, and muh108 (figure 3a), move only the two wires marked “a1”. Web installation instructions figure 1 horizontal duct heater […]