Daikin VRV IV+ RXYTQ8U5/U7YF Installation And Operation Manual

14 Piping installationInstallation and operation manual17RXYTQVRV IV+ heat pump for high ambient temperatures4P546223-1C – 2021.11If Then>2 ma≤2 m ≤2 m≥200 mm≥200 mmb>2 m >2 ma To indoor unitb Piping between outdoor unitsNOTICEThere are restrictions on the refrigerant pipe connectionorder between outdoor units during installation in case of amultiple outdoor unit system. Install according to followingrestrictions. The capacities of outdoor units A, B and Cmust fulfill the following restriction conditions: A≥B≥C.A B Ca b ca To indoor unitsb Outdoor unit multi connecting piping kit (first branch)c Outdoor unit multi connecting piping kit (second branch)14.2 Connecting the refrigerant piping14.2.1 To route the refrigerant pipingInstallation of refrigerant piping is possible as front connection orside connection (when taken out from the bottom) as shown in thefigure below.a bca Left-side connectionb Front connectionc Right-side connectionFor side connections, the knockout hole on the bottom plate shouldbe removed:cbaa Large knockout holeb Drillc Points for drillingNOTICEPrecautions when making knockout holes:▪ Avoid damaging the casing.▪ After making the knockout holes, we recommend youremove the burrs and paint the edges and areasaround the edges using repair paint to prevent rusting.▪ When passing electrical wiring through the knockoutholes, wrap the wiring with protective tape to preventdamage.14.2.2 To connect the refrigerant piping to theoutdoor unitNOTICE▪ Be sure to use the supplied accessory pipes whencarrying out piping work in the field.▪ Be sure that the field installed piping does not touchother pipes, the bottom panel or side panel. Especiallyfor the bottom and side connection, be sure to protectthe piping with suitable insulation, to prevent it fromcoming into contact with the casing.Connect the stop valves to the field piping using the accessory pipessupplied with the unit.The connections to the branch kits are the responsibility of theinstaller (field piping).14.2.3 To connect the multi connection piping kitNOTICEImproper installation may lead to malfunction of theoutdoor unit.▪ Install the joints horizontally, so that the caution label (a) attachedto the joint comes to the top.▪ Do not tilt the joint more than 7.5° (see view A).▪ Do not install the joint vertically (see view B).a aA B7.5°7.5°a Caution labelNOT allowedAllowed▪ Make sure that the total length of the piping connected to the jointis absolute straight for more than 500 mm. Only if a straight fieldpiping of more than 120 mm is connected, more than 500 mm ofstraight section can be ensured.>120 mm>500 mm14.2.4 To connect the refrigerant branching kitFor installation of the refrigerant branching kit, refer to the installationmanual delivered with the kit.