Installation manual2 ERX125~250A7W1BInverter condensing unit4PW30064-1D1. INTRODUCTION1.1. CombinationThe air conditioning unit can be installed in the following range.■ Always use appropriate units compatible with R410A.To learn which models of air handling units are compatible withR410A, refer to the product catalogs.■ The manufacturer of this outdoor unit has limited responsibilityfor total capacity of the system because performance isdetermined by the total system. The discharge air may fluctuatedepending on selected air handling unit and depending on theinstallation configuration.■ Both air handling unit (evaporator) and digital controller softwareand hardware are field supply and are to be selected by theinstaller. Refer to the manual "Option kit for combination ofDaikin condensing units with field supplied evaporators" formore details.Recommended temperature setting on the field suppliedcontroller is between 16°C and 25°C.■ Refer to the installation and operation manual of the control boxor to the Technical Data for allowed heat exchangercombinations.1.2. Standard supplied accessoriesSee location 1 in figure 6 for reference to where followingaccessories are supplied with the unit.See location 2 in figure 6 for reference to where followingaccessories are supplied with the unit.1.3. Technical and Electrical specificationsRefer to the Engineering Data Book for the complete list ofspecifications.2. MAIN COMPONENTSFor main components and function of the main components, refer tothe Engineering Data Book.3. SELECTING INSTALLATION SITEObtain the customer's permission before installing.The inverter units should be installed in a location that meets thefollowing requirements:1 The foundation is strong enough to support the weight of the unitand the floor is flat to prevent vibration and noise generation.2 The space around the unit is adequate for servicing and theminimum space for air inlet and air outlet is available. (Refer tofigure 1 and choose one of the possibilities).■ In case of an installation site where sides A+B+C+D haveobstacles, the wall heights of sides A+C have no impact onservice space dimensions. Refer to figure 1 for impact of wallheights of sides B+D on service space dimensions.■ In case of an installation site where only the sides A+B haveobstacles, the wall heights have no influence on anyindicated service space dimensions.3 Make sure that there is no danger of fire due to leakage ofinflammable gas.4 Ensure that water cannot cause any damage to the location incase it drips out the unit (e.g. in case of a blocked drain pipe).5 The piping length may not exceed the allowable piping length(see "4 Piping length restrictions" on page 5).6 Select the location of the unit in such a way that neither thedischarged air nor the sound generated by the unit disturbsanyone.7 Make sure that the air inlet and outlet of the unit are notpositioned towards the main wind direction. Frontal wind willdisturb the operation of the unit. If necessary, use a windscreento block the wind.8 Do not install or operate the unit on locations where air containshigh levels of salt, like e.g. in the vicinity of oceans. (Refer forfurther information to the engineering databook).9 During installation, avoid the possibility that anybody can climbon the unit or place objects on the unit.Falls may result in injury.10 When installing the unit in a small room, take measures in orderto keep the refrigerant concentration from exceeding allowablesafety limits in the event of a refrigerant leak.Installation manual 1Operation manual 1Item QuantityGas side accessory pipe 1Gas side accessory pipe 1Liquid side accessory pipe 1Liquid side accessory pipe 1■ Make sure to provide for adequate measures in orderto prevent that the outdoor unit be used as a shelterby small animals.■ Small animals making contact with electrical parts cancause malfunctions, smoke or fire. Please instruct thecustomer to keep the area around the unit clean.If not, the unit may fall over and cause damage orinjury.A B C D Sides along the installation site with obstaclesSuction sideNOTE The service space dimensions in figure 1 arebased on cooling operation at 35°C.Excessive refrigerant concentrations in a closed roomcan lead to oxygen deficiency.