6.2.2 Planning the gas installationRules for safe gas installation of the appliancesObserve the following rules to prevent hazards caused by faulty gas connections:The combi steamer is supplied from the factory for operation with a defined gas type (see appli‐ance type plate). In order to operate the combi steamer using different gas types, a qualified mem‐ber of staff from an authorized service company must first convert the combi steamer.After connecting to the gas supply and after any subsequent operation on gas-carrying compo‐nents, always check for leaks at every connection point and supply point to gas-carrying compo‐nents. Ensure that all the specified points inside and outside the appliance are gastight before put‐ting the combi steamer into operation.For table-top units with a wheeled platform, the gas supply must be provided via a flexible gas sup‐ply pipe.For table-top units on a wheeled platform, the length of the gas supply pipe must accommodate therange of movement allowed to the appliance by the retaining device of the wheeled platform. Whenmoving the assembly (platform plus appliance), never strain or wheel over the gas supply pipe.Type of gas applianceThe combi steamer is the following type of gas appliance:Type of gas appli‐anceMeaningB23 Open flues dependent on room airWith burner fan upstream of the burner andWithout draught diverterGas installation regulations and customer-supplied fittingsThe table below shows what equipment must be provided by the customer and what regulations mustbe observed when connecting the appliance.Equipment RegulationsFixed connection The appliance is designed to be permanently connected to the customer'sgas supply. Position of the gas supply: point J in the connection plan.The appliance must be secured in place.Gas shut-off device A gas shut-off device must be fitted close to the appliance. The gas shut-off device must be easily accessible, and situated so that it can also beshut off in case of danger.Pressure reducer A pressure reducer must be fitted if the supply flow pressure is too high.All connection compo‐nents All connection components provided by the customer must be tested inaccordance with local and national regulations.Providing a guaranteed supply of combustion airIn order to ensure a sufficient supply of combustion air, take specific measures according to the instal‐lation situation and power of the combi steamer in accordance with local regulations, standards anddirectives. As the responsible gas fitter, you must ensure there is an adequate supply of combustionair.Please note the following points:The amount of combustion air required depends on the rated gas consumption; see'Exhaust gasoutput rate' on page 125.6 InstallationInstallation manual 79
