LG LM50 Product Data page 76

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14. Installation

14.5 Drain Pipe Work

❑ Drain pipe gradient and support

1) - The drain pipe must be fitted at a gradient of at least 1/100.

- The drain pipe should be as short as possible and free from airlocks.

Indoor unit

2) Suspension bolts should be used to support long stretches of drain pipe in order to ensure that a gradient

of 1/100 is maintained.(PVC pipe should not be bent)

Spacing of supports for horizontal piping

Class

Rigid PVC pipe

3) The length of pipe laid horizontally should be kept a minimum.

❑ Drain trap

Fit any indoor unit whose drain pipe connection is subjected to negative pressure, with a drain trap.

1) Rig the drain trap as shown in the drawing below

2) Provide one trap per unit. A single trap for converging units will prove ineffective.

3) Rig the trap to allow for future changing.

Indoor unit

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Nominal diameter

25~40mm

Indoor unit

Plug

Gradient of at least 1 / 100

(1cm/ 1m)

Spacing

1.0m or less

H: 50mm or more

Indoor unit

2004 Product Data

Plug

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