ISO 23550:2018 pdf free

ISO 23550:2018 pdf free.Safety and control devices for gas and/or oil burners and appliances – General requirements
The wall thickness between these holes and gas ways shall take into account the design, material selected and method of manufacturing and be at least 1 mm nominal for casted parts. Holes necessary during manufacture, which connect gas passageways to atmosphere but do not affect the operation of the control, shall be permanently sealed by metallic means. Suitable jointing compounds may additionally be used.Parts of controls which are intended to be dismantled for servicing or adjustment shall be capable of being dismantled and reassembled considering specific provisions. Disassembling and assembling shall be in accordance with the installation and operating instructions.
Parts of controls shall be constructed or marked in such a way that incorrect assembly is impossible when following the installation and operating instructions.Closure parts, including those of measuring and test points, which are dismantled for servicing or adjustment shall be constructed such that leak-tightness is achieved by mechanical means (e.g. metal-to-metal joints, 0-rings) without using jointing compounds such as liquids, pastes or tapes.
Closure parts not intended to be dismantled shall show evidence of interference (e.g. lacquer), or fixed by fasteners requiring tools that are not commonly available.
Pre-setting devices shall only be adjustable by use of a tool. The means of adjustment shall be easily accessible and shall not change of its own accord.
Interference with the means of adjustment other than authorized in the installation and operating instructions shall be visible [for example, use of a sealing (lacquer)].Pre-setting devices that connects a gas-carrying part to atmosphere shall be made sound by a means which shall not seal on the thread of the pre-setting means (for example, use of an O-ring seal).
The pre-setting devices shall not be able to fall off. If an 0-ring or equivalent gasket provides a seal against the atmosphere, then when the pre-setting device is completely unscrewed, it shall not be able to be pushed out by gas pressure and shall remain tight at the maximum inlet pressure.ISO 23550 pdf free download.