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Daikin RXYQ5PY1 Service Manual Page 67

R-410a heat pump 50hz/60hz cooling only 50hz.
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Ceiling Mounted
Drain Piping Work
〈〈Rig the drain pipe as shown below and take measures against condensation.
Duct Type
Improperly rigged piping could lead to leaks and eventually wet furniture and
〈〈Insulate the drain hose inside the building.〉〉
(1) Carry out the drain piping.
! If converging multiple drain pipes, install according to the procedure shown below. (Install a
FXMQ200 · 250MAVE
General Information
! Keep piping as short as possible and slope it downwards so that air may not remained
trapped inside the pipe.
! Keep pipe size equal to or greater than that of the connecting pipe (Vinyl pipe of 25 mm
nominal diameter and 32 mm outer diameter).
! Use the attached drain hose and clamp.
Tighten the clamp firmly.
! Insulate the clamp metal with the sealing pad.
Metal clamp
4mm or less
! There is negative pressure inside the unit relative to atmospheric pressure when
the unit is running, so be sure to provide drain flap on the drain outlet. (See the
! In order to prevent foreign matter from building up inside the piping, you should
avoid curves as much as possible, and arrange so the trap can be cleaned.
drain trap for each indoor unit.)
! A drain trap need not be installed.
! The diameter of the piping is the same as that of the connecting pipe (PS1B), and should
be kept equal to or greater than that of the connecting pipe.
Attached drain hose
Large sealing pad
Drain hose
Bottom of unit
Metal clamp
Drain hose


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