Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to start a boiler [title] Familiarize yourself with the boiler operating instructions. [step] Depending on the make and model of your boiler, its startup procedure may vary. Many boilers list general startup instructions on a label attached to the front jacket panel.

Ending1: Always follow boiler directions for safe startup and usage. [substeps] Improper boiler startup or operation could result in damage to the boiler, exposure to hazardous materials, fires, or an explosion. Ending2: In most cases, however, you will follow these instructions for the proper boiler. [substeps] When using your boiler for a single burner, make sure that no one in the boiler is left out and that all goods, workloads, and materials and such are removed from the boiler before beginning to make your boiler. Ending3: [substeps] The boiler will have a proper turning elements to hot or cool the water tank on a hot or cold setting. Under the stove control panel for the boiler is a list of low changes. Ending4: The instructions can include any number of settings, such as " start this engine, " " shut off system, " or " fuel pull. " you may want to skip this section and access the boiler while you work.

Answer format: ending1/ending2/ending3/ending4