Ademco - 164 Mercury Contact For Central Office

No 164 MERCURY CONTACT CENTRAL OFFICE 164 DOUBLE CIRCUIT MERCURY CONTACT mount a WINDOWS THAT SWING IN MOUNTING ABOVE THE HINGE mount pointing SCREW IS ON THE RIGHT block MOUNTING BELOW THE HINGE mount pointing SCREW IS ON THE LEFT block WINDOWS THAT SWING OUT MOUNTING ABOVE THE HINGE mount I NG SCREW I S ON THE LEFT MOUNTING BELOW THE HINGE mount SCREW IS ON THE RIGHT block I NAL ADJUSTMENT the door on temporary etter ohmmeter where mercury now adjusted without either word ADEMCO With trifle connect not used jumper must be IONS TO CIRCUIT single N oppos OUT na I hear na I