Lennox VRF VECC007C432P Installation Manual page 16

Compact 4-Way Cassette Indoor Unit
(3) Install drainage pipe according to the following fig and arrange insulation to the drainage
pipe. Improper installation may lead to water leakage and damp the furniture and other
things in the room.
(4) 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.
(5) When the drainage pipelines are used for several units, the position of pipeline should be
about 100mm lower than the drainage port of each unit. In this case, thicker pipes should
be applied.
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) Insert the drainage hose into drain socket and then tighten the metal clamp securely.
(4) Warp the sealing pad over drainage hose and metal clamp for heat insulation.
(5) Make sure to perform insulation work for all drainage holes in the room in order to prevent
any possible water dropping due to dew condensation.
(6) Apply the suitable diameter for converging drainage pipe according to the operating
capacity of the unit, as show in Fig. 4.3.2.1.
①-Drainage pipes assembled by T-shaped joints
(7) The horizontal pipe can't be connected to vertical pipe in the same level; please select the
connection way as shown in following fig.
NO.1: Three-way connection of drainage pipe joints (Fig 4.3.2.2).
NO.2: Connection of downspout elbow (Fig 4.3.2.3).
Fig 4.3.1
Fig 4.3.2.1
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