Daikin RQYQ140PY1 Installation Manual

Also see for RQCEQ280PY13: Installation manual

Contents

Daikin RQYQ140PY1 Installation Manual Manual pdf 13 page image

English 8(2) To avoid the risk of oil retention in the stopping unit, alwaysconnect the shutoff valve and the piping between outdoorunits as shown in the figure A or figure B.(3) If the piping length between the outdoor units exceeds 2 m,create a rise of 200 mm or more in the gas line under a lengthof 2 m from the outdoor unit multi connection piping kit.5. Branching the refrigerant pipingHeed the restrictions below when installing the refrigerant branch-ing kit and read the installation instruction manual with the kit.(Improper installation could lead to malfunctioning or breakdownof the outdoor unit.)Install the REFNET joint so it splits horizontally or vertically.(Refer to figure 16)1. Horizontal surface2. ±30° or less3. Horizontal4. VerticalInstall the REFNET header so it splits horizontally.(Refer to figure 17)1. Horizontal surface• Install the joint horizontally so that the attached warning labelfaces strait up, and the tilt is within ±15°. (Refer to figure 18-1)Do not install vertically. (Refer to figure 18-2)• Maintain a straight portion of 500 mm or more until the split ofthe joint without wrapping any onsite piping around this area.Over 500 mm of straight area can be maintained by connect-ing at least 120 mm of onsite pipe (straight) to the joint.(Refer to figure 18-3)(Refer to figure 18)1. Warning label2. Horizontal surface3. ±15° or less4. Ground5. Onsite pipe (120mm length or more)6. Straight part of 500mm or moreAB ABFront connections Side (bottom) connectionsProhibited patternOil remains in the stopping outdoor unit.Change to pattern 1 or pattern 2Front connectionsSide (bottom) connectionsto indoor unitto indoor unitOil remains in the outdoor unit Awhen the system stops.Oil remains in the outdoor unit Cwhen the system stops.Change as shown in the figure below.Change as shownin the figure below.Risingheight:200 mmor moreEliminate differencein level Eliminate differencein level Set the risingThe explanation isbelows in case ofthree multi outdoorunits.The explanation isbelows in case ofthree multi outdoorunits.If 2 m or moreIf less than 2mto indoorunitto indoorunitBetween outdoor unitsSuction gas pipeHP/LP gas pipeBetween outdoor unitsSuction gas pipeHP/LP gas pipeless than 2m less than 2mless than 2m less than 2mRising height:200 mmor moreRising height:200 mmor more