Daikin RYYQ8T7Y1B Installation And Operation Manual

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Daikin RYYQ8T7Y1B Installation And Operation Manual Manual pdf 21 page image

RYYQ+RYMQ+RXYQ8~20T7Y1BVRV IV System Air Conditioner4P329765-1 – 2012.09Installation and operation manual161 To indoor units2 Outdoor unit multi connecting piping kit (first branch)3 Outdoor unit multi connecting piping kit (second branch)9.6. Multi system piping installation Front connectionRemove the front plate knock out holes to connect (see figurebelow). Bottom connectionRemove the knock out holes on the bottom frame and route thepiping under the bottom frame (see figure below).9.6.1. Precautions when connecting piping between outdoorunits (multiple outdoor unit system) To connect the piping between outdoor units, an optional multiconnection piping kit BHFQ22P1007/1517 is always required.When installing the piping, follow the instructions in theinstallation manual that comes with the kit. Only proceed with piping work after considering the limitationson installing listed here and in the chapter "10.2. Connecting therefrigerant piping" on page 17 always referring to the installationmanual delivered with the kit.9.6.2. Possible installation patterns and configurations The piping between the outdoor units must be routed level orslightly upward to avoid the risk of oil retention into the piping.1 To indoor unit2 Piping between outdoor unitsProhibited patterns: change to pattern 1 or 2.1 To indoor unit2 Piping between outdoor units To avoid the risk of oil retention to the outmost outdoor unit,always connect the stop valve and the piping between outdoorunits as shown in the 4 correct possibilities of the figure below.Prohibited patterns: change to pattern 1 or 2.1 To indoor unit2 Oil collects to the outmost outdoor unitChange to configuration as in figures below1 To indoor unit2 Oil collects to the outmost outdoor unit when the systemstopsCorrect configuration1 To indoor unit If the piping length between the outdoor units exceeds 2 m,create a rise of 200 mm or more in the gas line within a length of2 m from the kit.If ≤2 m1 To indoor unit2 Piping between outdoor unitsIf >2 m1 To indoor unit2 Piping between outdoor unitsPattern 1 Pattern 2A B C1 2 321112122112 2112 2 212 2 21 212 1 211 1PP12P1P PPPPP