Daikin VRV III - Page 403

Installation ED34-862
398 FXUQ-MA
Drain Piping Work
1 - 1.5 m
VP20
VP20
Drain piping
(field supplied)
Drain hose (1) (For VP20 connection)
(accessory)
500
Clamp (2) (accessory)
Notes on upward running drain hose
Fig. 26
Ceiling slab
Hanger
bracket
Elbow (10)
Large sealing pad (8) (accessory)
Min. 1/100 gradient
Rearward running piping
GOOD
WRONG
Fig. 27
Rightward running drain hose
CAUTION
Water pooling in the drainage piping can cause the drain to clog.
1. Rig drain piping (Refer to Fig. 26)
As for drain work, perform piping in such a manner that water can be drained properly.
As for drain piping, the connection can be made from three different directions.
• Employ a pipe with either the same diameter or with the diameter larger (excluding the raising section)
than that of the connecting pipe (PVC pipe, nominal diameter 20 mm, outside diameter 26 mm).
• Keep the drain pipe short and sloping downwards at a gradient of at least 1/100 to prevent air pockets
from forming. (Refer to Fig. 27)
• To keep the drain hose from sagging, space hanging wires every 1 to 1.5 m. (Refer to Fig. 26)
• Use only the included drain hose (1), (for rightward running drain hose) or elbow (10) (for upward run-
ning drain hose) and clamp (2).
• Fit the drain hose (1) or elbow (10) over the drain pipe up to the neck and fasten tight with the clamp (2).
• Insulate the clamp (2) and drain hose or elbow (10) with the included sealing pad (8). (Refer to Fig.28)
• Make sure that heat insulation work is executed on the following 2 spots to prevent any possible water
leakage due to dew condensation.
• Insulate the drain hose inside the building.
• Drain socket
Fig. 28
Metal clamp (2) (accessory)
Large sealing pad (8) (accessory)
Elbow (10)
(accessory)
Long
end
Metal clamp (2)
(accessory)
Large sealing pad (8) (accessory)
Short end
Upward
running
piping
Elbow (10) (accessory)
Metal clamp (2) (accessory)
Large sealing pad (8)
(accessory)
Drain hose (1)
(accessory)
CAUTION
•
• If converging multiple drain piping, install according to the procedure shown below. (Refer to Fig. 29)
Select converging drain piping whose gauge is suitable for the operating capacity of the unit.
T-joint converging drain piping
≥100mm
Do not twist or bend the drain hose (1), so that excessive force is not applied to it, as this could cause leaks.
Metal clamp (2)
(accessory)
Drain hose (1)
(accessory)
Tape
≤ 4mm
Large
sealing pad (8)
Metal clamp (2)
(accessory)
(accessory)
Fig. 29
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