MCO 200/400 Series Controller Conversions GAS: 200 to 450 115v Gas use 4518191 (click for instructions) (click for diagram) 450/410 to 200 115v Gas use 4522593 (click for instructions) (click for diagram)   Electric: 200 to 450 Electric use 4518192 (click for instructions) (click for diagram) 450/410 to 200 Electric use 4518523 (click for instructions) (click for diagram) Harness Adapter for Non Molex Units Detail