42/24-10 EN Rev. 9 Chapter 2: Gas Analyzer Unpacking and Installation 2-5Gas Connections InstallationSince the gas ports are now easily accessible, connect the gas lines to theanalyzer module before the gas analyzer is installed.Gas Port Design The analyzer module gas ports have 1/8-NPT internal threads (connection diagramssee Chapter 3 “Gas Line Connection”).Material SuppliedTubing connectors with 1/8 NPT threads andPTFE sealing tapeyesnoWhat materials areneeded?orThreaded connections with 1/8 NPT threads andPTFE sealing tapenonoCAUTION!The fittings must be clean and free of residue. Contaminants can enter theanalyzer and damage it or lead to false measurement results.Do not use sealing compounds to seal the gas connections.Sealing compound components can lead to false measurement results.The gas connections on the gas module are made of plastic (PVDF). Do notuse metal tubing connectors or threaded connectors.The gas connection ports on the Caldos25 versions for flowing referencegas and for corrosive sample gas are made of plastic (PVC-C). Do not usemetal tubing connectors or threaded connectors.Step Action1 Remove the yellow stopper screws (5 mm Allen screws) from theconnection ports.Screw the tubing or threaded connectors with sealing material in theconnection ports.Gas ConnectionInstallation2Screw the fittings on carefully and not too tightly. Follow themanufacturer’s installation instructions.Gas Path SealIntegrity VerificationThe sample gas and reference gas (if applicable) path seal integrity is checked inthe factory. Since the gas path seal integrity can be affected during shipping, thischeck should be performed at the installation site (see page 9-2 for instructions).Since the system housing has to be opened if a leak is found, the gas path sealintegrity should be checked before the gas analyzer is installed.
