Navien CH-180 ASME Installation Manual

Also see for CH-180: Owner's operation manual User's operation manual Service manual Installation manual Operation manual

Navien CH-180 ASME Installation Manual Manual pdf 29 page image

Gas Piping:29Gas Piping Guidelines:Navien recommends the combination Boiler be the first appliance installed downstream of thegas meter to ensure it will have sufficient gas supply.Use the charts on the following pages to properly size the gas supply line.The gas connection fitting on all Navien units is 3/4". DO NOT use less than 3/4" piping.When using flexible gas line, ensure the pipe’s inner diameter is sufficient to supply therequired BTUs, also ensure that the flexible line has no crimps or tight bends as this willrestrict gas flow.Install a manual gas shut-off valve on the gas supply line and the Boiler.When using rigid pipe, Navien recommends the installing a union on the gas supply lineclose to the Boiler to facilitate any future maintenance and service.A sediment trap must be provided upstream of the gas contols.LP Gas Piping Installatinon-. Regular System1 2034569871 2034569871 2034569871 2034569871 2034569871 203456987Gas supplyGasregulatorFurnace Domesticgas stovePipe size: Min. 3/4 inch(inner diameter)Gas inlet adapter UnionTotal capacity of connected appliancesGas meter’s capacityBottom viewFull Size Pipe1/4"~3/8" PipeGas Regulator(Supply Press. 12")Full Size PipeGas TankNavien recommends that the Combinationboiler be the first appliance to be connected tothe gas meter/gas regulator.~h{lywylzz|yl~h{lywylzz|yl