Lennox AIR CONDITIONER, Installation Manual

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5
INSTALL THE CONNECTING PIPE
The drain pipe of indoor unit must be heat insulated, or it will condense dew, as well as
the connections of the indoor unit.
Hard PVC binder must be used for pipe connection, and make sure there is no leakage.
With the connection part to the indoor unit, please be noted not to impose pressure on the
side of indoor unit pipes.
When the declivity of the drain pipe downwards is over 1/100, there should not be any win
ding.
The total length of the drain pipe when pulled out traversely shall not exceed 20m, when
the pipe is over long, a prop stand must be installed to prevent winding.
Refer to the figures on the right for the installation of the pipes.
CONNECT THE DRAIN PIPE
1.5m~2m
Insulating
material
Downward declivity
lower than 1/100
VP30
Downward declivity
lower than 1/100
Put as deep as possible
(about 10cm)
Bend
S shape
1. Install indoor unit drain pipe
The outlet has PTI screw bread, Please use sealing materials and pipe sheath (fitting)
when connecting PVC pipes.
CAUTIONS
2. Drainage test
Check whether the drainpipe is unhindered
New built house should have this test done before paving the ceiling.
Check whether the height drop between the indoor unit and outdoor unit, the length of
refrigerant pipe, and the number of the bends meet the following requirements:
The max height drop...................................................................................................20m
(If the height drop is more than 10m, you had better put the outdoor unit over above the
indoor unit.)
The length of refrigerant pipe.......................................................................less than 30m
The number of bends....................................................................................Less than 15