Daikin VRV 5-S RXYSA8AMY1B Installation And Operation Manual

16 Charging refrigerantInstallation and operation manual34RXYSA8~12AMY1BVRV 5-S system air conditioner4P752781-1B – 2024.02AmbienttemperatureHumidity Minimum thickness≤30°C 75% to 80% RH 15 mm>30°C ≥80% RH 20 mmBetween outdoor and indoor unit1 Insulate and fix the refrigerant piping and cables as follows:gbafecda Gas pipeb Gas pipe insulationc Interconnection cabled Field wiring (if applicable)e Liquid pipef Liquid pipe insulationg Finishing tape2 Install the service cover.Inside the outdoor unitTo insulate the refrigerant piping, proceed as follows:aba Insulation materialb Caulking etc.1 Insulate the liquid and gas piping.2 Wind heat insulation around the curves, and then cover it withvinyl tape.3 Make sure the field piping does not touch any compressorcomponents.4 Seal the insulation ends (sealant etc.) (b, see above).5 Where necessary, wrap the field piping with vinyl tape to protectthe insulation against sharp edges.6 If the outdoor unit is installed above the indoor unit, cover thestop valves with sealing material to prevent condensed wateron the stop valves from moving to the indoor unit.NOTICEAny exposed piping can cause condensation.7 Reattach the service cover and the piping intake plate.8 Seal all gaps to prevent snow and small animals from enteringthe system.aa SealWARNINGProvide adequate measures to prevent that the unit can beused as a shelter by small animals. Small animals thatmake contact with electrical parts can cause malfunctions,smoke or fire.NOTICEDo not block the air vents. This could affect air circulationinside the unit.15.3.5 To check for leaks after chargingrefrigerantAfter charging refrigerant in the system an additional leak test mustbe performed. Refer to "16.6 To check refrigerant piping joints forleaks after charging refrigerant" [437].16 Charging refrigerant16.1 Precautions when chargingrefrigerantWARNING▪ Only use R32 as refrigerant. Other substances maycause explosions and accidents.▪ R32 contains fluorinated greenhouse gases. Its globalwarming potential (GWP) value is 675. Do NOT ventthese gases into the atmosphere.▪ When charging refrigerant, ALWAYS use protectivegloves and safety glasses.NOTICEIf the power of some units is turned off, the chargingprocedure cannot be finished properly.NOTICETurn ON the power 6 hours before operation in order tohave power running to the crankcase heater and to protectthe compressor.NOTICEIf operation is performed within 12 minutes after the indoorand outdoor units are powered on, the compressor will notoperate before the communication is established in acorrect way between outdoor unit(s) and indoor units.NOTICEBefore starting charging procedures, check if the7‑segment display indication of the outdoor unit A1P PCBis as normal (see "18.1.3 To access mode 1 or 2" [441]).If a malfunction code is present, see "22.1 Solvingproblems based on error codes" [447].NOTICEMake sure all connected indoor units are recognised (seesetting [1‑10] in "18.1.6 Mode 1: monitoringsettings" [441]).NOTICEIn case of maintenance and the system (outdoor unit+fieldpiping+indoor units) does not contain any refrigerant anymore (e.g., after refrigerant reclaim operation), the unit hasto be charged with its original amount of refrigerant (referto the nameplate on the unit) and the determined additionalrefrigerant amount.