Lennox Compact Pro Installation Operating & Maintenance Manual page 11

2.3.2
When the machine is heating, it produces condensate
Provision for
that has to be eliminated through a specific drain line,
draining con-
otherwise the machine will not work. Drainage occurs by
densate for
gravity. For this reason, it is essential for the drain line to
machines with
have a minimum inclination of at least 3% throughout its
heat pump.
length. The pipe can be rigid or not, with a minimum
internal diameter of 16 mm. If the line drains into a sewer
system, it should be provided with a trap ahead of the main
outlet. The trap should be at least 300 mm lower than the inlet
opening on the air conditioner (fig. 7).
If the drainpipe drains into a vessel (tank or other container),
this container should not be sealed and the drainpipe should
not remain immersed in the water (see fig. 8).
The correct position for the pipe inlet on the machine is shown on
the template for drilling and positioning the machine (see
also fig. 6).
The air conditioner is equipped with a pipe with an external
diameter of 14 mm for drainage of condensate. This pipe
protrudes from the machine for a length of about 400 mm.
The pipe should be fitted inside the one provided by you for a
distance of at least 200 mm, without any sharp bends that could
obstruct it.
When draining toward the outside, the pipe can be inserted
through the wall (always making sure to give it a suitable
inclination) (see fig. 5).
Caution: make sure, in this case, that the water expelled
outward does not damage or disturb persons or
property. During the winter this type of drainage may
cause sheets of ice to form.
2.3.3
After drilling the holes, the plastic pipes supplied with the
Installation of air
air conditioner have to be fitted through them. The pipe
pipes and
with insulation on the inside has to be fitted in the right
external
hand hole with the insulated part toward the inside as
gratings
indicated on the label applied to it. The length of the pipes
should be 55 mm less than that of the wall. To cut the pipe,
a normal handsaw can be used. After cutting the pipes, fit
the ends into the two internal anchoring flanges (fig. 10).
The tube diameter is 152mm and should fit comfortably into
the hole formed by the 158mm diameter core drill. When
introducing the tubes they may need to be forced slightly using, in
the most difficult cases a normal rubber hammer (fig. 10/1).
Having the hole internal diameter extremely similar to the
tube external diameter avoids dangerous slacks which may
generate humidity infiltrations or air noises. Should the insertion
prove to be too difficult, we suggest you drill using the core bit
inside the hole so as to widen the internal diameter slightly. If
there is excessive play and air gap around the tubes then we
recommend a sealant be used to ensure a tighter fit.
Next, fit the pipes into the holes in the wall and fasten the flanges
with 4 anchor bolts with diameter 6, taking care to keep the two
fastening holes in a horizontal position.
Fig. 9
Fig 10/11