3333Outdoor InstallationBranch pipeBranch pipe selection:Total indoor capacity (100W) Model (optional)Less than 335 FQG-B335AMore than 335, less than 506 FQG-B506AOutdoor unit typeThe master unit will choose the closest one to the 1st branch pipe.Note:• When connecting the outdoor branch pipe and the outdoor, please pay attention to the outdoor pipe dimension.• When adjusting the diameter among outdoor branch pipe and among the units, please must execute at thebranch pipe side.• Please install the outdoor branch pipe (gas/liquid side) in horizontal or vertical direction.• When welding with hard solder, please must blow nitrogen. If not, a number of oxide will be produced and causeheavy damage. Besides, to prevent water and dust into the pipe, please make the brim as outer roll.Pipe installationWhen doing the piping connection, please do the following:■ Please don't let the pipe and the parts in the unit collide each other.■ When connecting the pipes, close the valves fully.■ Protect the pipe end against the water, impurity into the pipes (welding after being flat, or being sealed withadhesive tape).■ Bend the pipe as large semi-diameter as possible (over 4 times of the pipe diameter).■ The connection between outdoor liquid pipe and the distributing pipe is flared type. Please expand the pipe withthe special tool for R410A after installing the expanding nut. But if the projecting pipe length has been adjustedwith the copper pipe gauge, you can use the original tool to expand the pipe.■ Since the unit is with R410A, the expanding oil is ester oil, not the mineral oil.■ When doing the flare connection, please do the following: When connecting the expanding pipe, fasten the pipesvwith double-spanner. The torque refers to the former info.Adhesive sidePrepare on fieldSeal the connection and wrap theheat insulator with adhesive tapeCut off pipe with the cutterCut off at the middle Right WrongFloor FloorHorizontal