Lennox VE2C009N432U, Installation Manual, Page: 17 / 32

Multi Variable Air Conditioners Two-way Cassette Type Indoor Unit
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(7) You can buy normal hard PVC pipe used as the drainage pipe. During connection, insert
the end of PVC pipe into the drainage hole and then tighten it with drainage hole and wire
binder. Never connect the drainage hole and drainage hose with glue.
(8) When the drainage pipelines are used for several units, the position of pipeline should be
about 100mm (4 inch) lower than the drainage port of each unit. In this case, thicker
pipes should be applied.
Fig 4.3.1
4.3.2 Installation of Drainage Pipe
(1) Drainage pipe should have the same diameter or larger diameter than the connection
pipes (PVC pipe, outside diameter 25mm, thickness≥1.5mm).
(2) Keep drainage pipe short and sloping downwards at a gradient of at least 1% for
preventing forming air bubbles.
(3) If the gradient of drainage pipe could not meet the installation requirements, raising pipe
should be applied.
(4) Insert the drainage hose into drain socket and then tighten the metal clamp securely.
(5) Warp the sealing pad over drainage hose and metal clamp for heat insulation.
(6) Make sure to perform insulation work for all drainage hoses in the room in order to
prevent any possible water dropping due to dew condensation.
(7) Apply the suitable diameter for converging drainage pipe according to the operating
capacity of the unit, as show in Fig. 4.3.2.
Fig 4.3.2
①
-Drainage pipes assembled by T-shaped joints.