Daikin RWEYQ8T9Y1B Installer And User Manual

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5 PreparationInstaller and user reference guide12RWEYQ8~14T9V1B + RWEYQ8~14T9Y1BVRV IV water-cooled system air conditioner4P452191-1 – 2017.04▪ In places where a mineral oil mist, spray or vapour may bepresent in the atmosphere. Plastic parts may deteriorate and falloff or cause water leakage.NOTICEThis equipment is compliant with Class A of EN55032/CISPR 32. In a residential environment this equipmentmay cause radio interference.NOTICEThe equipment described in this manual may causeelectronic noise generated from radio-frequency energy.The equipment complies to specifications that aredesigned to provide reasonable protection against suchinterference. However, there is no guarantee thatinterference will not occur in a particular installation.It is therefore recommended to install the equipment andelectric wires keeping proper distances away from stereoequipment, personal computers, etc.bcfd dac b e (mm)≥1500≥1000≥1000≥1000≥1500≥1500≥1500a Personal computer or radiob Fusec Earth leakage protectord User interfacee Indoor unitf Outdoor unitIn places with weak reception, keep distances of 3 m or more toavoid electromagnetic disturbance of other equipment and useconduit tubes for power and transmission lines.CAUTIONAppliance not accessible to the general public, install it in asecured area, protected from easy access.This unit, both indoor and outdoor, is suitable forinstallation in a commercial and light industrialenvironment.▪ When installing, take strong winds, typhoons or earthquakes intoaccount, improper installation may result in the unit turning over.▪ Take care that in the event of a water leak, water cannot causeany damage to the installation space and surroundings.▪ When installing the unit in a small room, take measures in order tokeep the refrigerant concentration from exceeding allowablesafety limits in the event of a refrigerant leak, refer to "Aboutsafety against refrigerant leaks" on page 12.CAUTIONExcessive refrigerant concentrations in a closed room canlead to oxygen deficiency.▪ Ensure that water cannot cause any damage to the location byadding water drains to the foundation and prevent water traps inthe construction.▪ Install drain piping to ensure proper drainage and insulate pipingto prevent condensation. Improper drain piping may result inindoor water leakage and property damage.5.2.2 Securing safety against refrigerant leaksAbout safety against refrigerant leaksThe installer and system specialist shall secure safety againstleakage according to local regulations or standards. The followingstandards may be applicable if local regulations are not available.This system uses R410A as refrigerant. R410A itself is an entirelysafe non-toxic, non-combustible refrigerant. Nevertheless care mustbe taken to ensure that the system is installed in a room which issufficiently large. This assures that the maximum concentration levelof refrigerant gas is not exceeded, in the unlikely event of major leakin the system and this in accordance to the local applicableregulations and standards.About the maximum concentration levelThe maximum charge of refrigerant and the calculation of themaximum concentration of refrigerant is directly related to thehumanly occupied space in to which it could leak.The unit of measurement of the concentration is kg/m³ (the weight inkg of the refrigerant gas in 1 m³ volume of the occupied space).Compliance to the local applicable regulations and standards for themaximum allowable concentration level is required.According to the appropriate European Standard, the maximumallowed concentration level of refrigerant to a humanly space forR410A is limited to 0.44 kg/m³.baa Direction of the refrigerant flowb Room where refrigerant leak has occurred (outflow of allthe refrigerant from the system)Pay special attention to places such as basements etc., whererefrigerant can accumulate, since refrigerant is heavier than air.To check the maximum concentration levelCheck the maximum concentration level in accordance with steps 1to 4 below and take whatever action is necessary to comply.1 Calculate the amount of refrigerant (kg) charged to each systemseparately.Formula: A+B=CA Amount of refrigerant in a single unit system (amount ofrefrigerant with which the system is charged before leavingthe factory).B Additional charging amount (amount of refrigerant addedlocally).C Total amount of refrigerant (kg) in the system.NOTICEWhere a single refrigerant facility is divided into 2 entirelyindependent refrigerant systems, use the amount ofrefrigerant with which each separate system is charged.2 Calculate the volume of the room (m³) where the indoor unit isinstalled. In one of the following cases, calculate the volume of(D), (E) as a single room or as the smallest room: