Daikin VRV IV W+ Series Installer And User Reference Manual

Also see for RWEYQ10T9Y1B: Installer and user guide Installation and operation manual Installation and operation manual

18 | Piping installationInstaller and user reference guide79RWEYQ8~14T9Y1BVRV IV water-cooled system air conditioner4P452191-1B – 2020.10NOTICEIn case of plastic pipes, make sure they are fully oxygen diffusion tight according toDIN 4726. The diffusion of oxygen into the piping can lead to excessive corrosion.▪ Connecting piping – Legislation. Make all piping connections in accordance withthe applicable legislation and the instructions in the "Installation" chapter,respecting the water inlet and outlet.▪ Connecting piping – Force. Do NOT use excessive force when connecting thepiping. Deformation of the piping can cause malfunctioning of the unit.▪ Connecting piping – Tools. Only use appropriate tooling to handle brass, which isa soft material. If NOT, pipes will get damaged.▪ Connecting piping – Stainless steel. Only use stainless steel material to connectthe water piping to the unit. If NOT, pipes will get corroded. Take preventivemeasures, for example by insulating the connection on the water pipe.▪ Connecting piping – Air, moisture, dust. If air, moisture or dust gets into thecircuit, problems may occur. To prevent this:- Only use clean pipes- Hold the pipe end downwards when removing burrs.- Cover the pipe end when inserting it through a wall, to prevent dust and/orparticles from entering the pipe.- Use a decent thread sealant to seal connections.▪ Piping work – Dripping. The outdoor unit is intended for indoor installation.Carry out piping work in such a way that no water drips on the outdoor unit.▪ Outlets. Do NOT connect the drain outlet to the water outlet.▪ Filter. Install the filter in the water piping inlet within a distance of 1.5 m fromthe outdoor unit. If sand, waste or rust particles are mixed in the watercirculation system, metal materials will become corroded.▪ Insulation. Insulate up to the base of the heat exchanger.≥80 mmbl gdeeaijckhfa Air purge (field supply)b Water outletc Water inletd Shut-off valve (field supply)e Water connectionf Water piping (field supply)g Insulation (field supply)h Heat exchangeri Filter (accessory)j Drain valve (field supply)k Drain connectionl Insulation cover▪ Water pump. After filling the water piping, run the water pump (field supply) toflush the water piping. After flushing, clean the filter.▪ Freeze. Protect against freezing.▪ Water pipes. ALWAYS comply with local and national regulations.