Daikin VRV III Manual page 159

Installation
Drain Piping Work
〈〈Rig the drain pipe as shown below and take measures against condensation. Improperly rigged piping
could lead to leaks and eventually wet furniture and belongings.〉〉
(1) Carry out the drain piping.
• Keep piping as short as possible and slope it downwards so that air may not remain trapped inside the pipe.
• The diameter of the drain pipe should be greater than or equal to the diameter of the connecting pipe (vinyl tube;
pipe size : 25 mm ; outer dimension : 32 mm).
• Use the drain hose and metal clamp. Insert the drain hose into the drain socket, up to the white tape.
Tighten the metal clamp until the screw head is less than 4 mm from the hose.
CAUTION
Setting the unit at an angle opposite to the drain piping might cause leaks.
• Wrap the sealing pad over the clamp and drain hose to insulate.
• Insulate the drain hose inside the building.
While referring to the figure on the right, insulate the clamp and drain hose with the large sealing pad.
• If the drain hose cannot be sufficiently set on a slope, execute the drain raising piping.
• Secure a downward gradient of 1 / 100 or more for the drain pipe. To accomplish this, mount supporting brackets
at an interval of 1 - 1.5 m.
〈Precautions when doing drain-up piping work.〉
• Make sure the drain-up piping is at most 330 mm high.
• Stand the drain-up piping horizontally, and make sure it is not further than 300 mm from the base of the drain
socket.
• Use the following outline if laying concentrated drain piping.
• If converging multiple drain pipes, install according to the procedure shown below.
Select converging drain pipes whose gauge is suitable for the operating capacity of the unit.
154
Metal clamp
Tape
Large sealing pad
Metal clamp
(accessory)
(accessory)
≤4mm
Ceiling slab
1-1.5 m
300
Drain-up piping
Riser
Metal clamp Drain hose (accessory)
(accessory)
T-joint converging drain pipes
Drain hose
Support bracket
Adjustable
( 330)
(length: mm)
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ED34-862
3P086156-8V
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