Haier 1U105S2SS1FA Installation Manual

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18INFORMATIONAfter opening the stop valve, it is possible thatthe pressure in the refrigerant piping does notrise. This migeh be caused by e.g. the closedstate of the expansion valve in the outdoor unitcircuit, but does not present any problem forcorrect operation of the unit.9. Charging refrigerant9.1 Important information regarding therefrigerant used This product contains fluorinated greenhouse gasescovered by the Kyoto Protocol. Do not vent gases intothe atmopsphere. Evacuate Indoor Unit and interconnecting pipework to avacuum pressure of 500 microns and hold for 15 minutes. The Outdoor unit is supplied with refrigerant HFC-410A (R410A) sufficient for 30m line length.Calculate additional refrigerant to suit your line length;refer supplied Specification Sheet. Open the service valve at the Outdoor unit to allowrefrigerant to flow throughout the system. For long line lengths, oil (of the correct type) shouldbe added to the refrigerant system at the rate shownin the Specification Date table.(see paragraph 9.5) Leak check all brazed and fitted joints.9.2. Precautions and general guidelines When servicing the unit requires the refrigerantsystem to be opened, treatment and evacuationof refrigerant must be done in accordance withapplicable legislation. Refrigerant can not be chargeduntil field wiring has been completed. Refrigerant may only be charged after performing theleak test and vacuum drying.CAUTIONWhen charging a system, care shall be takenthat its maximum permissible charge is neverexceeded, in view of the danger of liquid hammer.WARNING Refrigerant cylinders shall be opened shlowly. Always use protective gloves and protect your eyeswhen charging refrigerant.DANGER When the power is on, please close the front panelwhen leaving the unit unattended.Charging with an unsuitable substance may causeexplosions and accidents, so always ensuren thatthe appropriate refrigerant (R32) is charged. This unit requires additional charging of refrigerantaccording to the length of refrigerant piping connectedat the site. Make sure to charge the refrigerant in liquid state tothe liquid pipe. Since R410A is a mixed refrigerant, itscomposition changes if charged in its gaseous stateand normal system operation would then no longerbe assured. Before charging, checkwhetherthe refrigerant cylinderhas a suphon attached or not and position thecylinder accordingly.Fill using acylinder with asiphon attachedCharge the liquidrefrigerant withthe cylinder inupright position.Fill using a cylinderwith a siphonattached Charge theliquid refrigerant withthe cylinder in up-side- down position.On this model it is not necessary to charge additionally ifthe piping length≤30m.9.3. Complete rechargingNOTICEBerore recharging, make sure to execute vacuumdrying of the intermal piping of the unit as well.To do so, use the internal service port of the unit.Do not use the service ports located on the stopvalve, since vacuum drying can not be performedproperly from these ports.Outdoor units have 1 port on the piping. It isbetween the heat exchanger and the 4-way valve.In case complete recharging is required (aftera leak, etc.),refer to teh information below to determine the necessaryamount of refrigerant.WARNINGSome sections ofthe refrigerant circuit maybe isolated from other sections caused bycomponents with specificfunctions (e.g. valves).The refrigerant circuit therefore features additionalservice ports for vacuuming, pressure relief orpressurizing the circuit. In case it is required toperform brazing on the unit, ensure that there isno pressure remaining inside the unit. Internalpressures need to be released with ALL theservice ports indicated on the figures belowopened. The location is depending on mode type.