Daikin RXF60B2V1B Installer's Reference Manual

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Daikin RXF60B2V1B Installer's Reference Manual Manual pdf 16 page image

6 InstallationInstaller reference guide16RXF50+60B2_RXF71A2_RXP50~71L2_(A)RXM42~71N2_RXJ50N2_RXA42+50B2R32 split series4P513661-6B – 2018.05ihjabchkdffega Low pressure gaugeb Gauge manifoldc High pressure gauged Low-pressure valve (Lo)e High-pressure valve (Hi)f Charging hosesg Vacuum pumph Valve capsi Service portj Gas stop valvek Liquid stop valve1 Vacuum the system until the pressure on the manifold indicates−0.1 MPa (−1 bar).2 Leave as is for 4-5 minutes and check the pressure:If the pressure… Then…Does not change There is no moisture in thesystem. This procedure isfinished.Increases There is moisture in thesystem. Go to the next step.3 Vacuum the system for at least 2 hours to a manifold pressureof −0.1 MPa (−1 bar).4 After turning the pump OFF, check the pressure for at least1 hour.5 If you do NOT reach the target vacuum or CANNOT maintainthe vacuum for 1 hour, do the following:▪ Check for leaks again.▪ Perform vacuum drying again.NOTICEMake sure to open the stop valves after installing therefrigerant piping and performing vacuum drying. Runningthe system with the stop valves closed may break thecompressor.INFORMATIONAfter opening the stop valve, it is possible that the pressurein the refrigerant piping does NOT increase. This might becaused by e.g. the closed state of the expansion valve inthe outdoor unit circuit, but does NOT present any problemfor correct operation of the unit.6.6 Charging refrigerant6.6.1 About charging refrigerantThe outdoor unit is factory charged with refrigerant, but in somecases the following might be necessary:What WhenCharging additional refrigerant When the total liquid pipinglength is more than specified(see later).Completely recharging refrigerant Example:▪ When relocating the system.▪ After a leak.Charging additional refrigerantBefore charging additional refrigerant, make sure the outdoor unit'sexternal refrigerant piping is checked (leak test, vacuum drying).INFORMATIONDepending on the units and/or the installation conditions, itmight be necessary to connect electrical wiring before youcan charge refrigerant.Typical workflow – Charging additional refrigerant typically consistsof the following stages:1 Determining if and how much you have to charge additionally.2 If necessary, charging additional refrigerant.3 Filling in the fluorinated greenhouse gases label, and fixing it tothe inside of the outdoor unit.Completely recharging refrigerantBefore completely recharging refrigerant, make sure the following isdone:1 All refrigerant is recovered from the system.2 The outdoor unit's external refrigerant piping is checked (leaktest, vacuum drying).3 Vacuum drying on the outdoor unit's internal refrigerant piping isperformed.NOTICEBefore completely recharging, perform vacuum drying onthe outdoor unit's internal refrigerant piping as well.Typical workflow – Completely recharging refrigerant typicallyconsists of the following stages:1 Determining how much refrigerant to charge.2 Charging refrigerant.3 Filling in the fluorinated greenhouse gases label, and fixing it tothe inside of the outdoor unit.6.6.2 About the refrigerantThis product contains fluorinated greenhouse gases. Do NOT ventgases into the atmosphere.Refrigerant type: R32Global warming potential (GWP) value: 675WARNING: FLAMMABLE MATERIALThe refrigerant inside this unit is mildly flammable.WARNINGThe appliance shall be stored in a room withoutcontinuously operating ignition sources (example: openflames, an operating gas appliance or an operating electricheater).