York YKKE Series Installation Manual page 14

3. Using a 65-mm (2.5") core drill, drill a hole in the wall.
Make sure that the hole is drilled at a slight downward
angle, so that the outdoor end of the hole is lower
than the indoor end by about 12mm (0.5"). This will
ensure proper water drainage (See Fig. 6.5). Place the
protective wall cuff in the hole. This protects the edges
of the hole and will help seal it when you finish the
installation process.
Outdoor
12mm / 0.5 inch
Fig. 6.5
NOTE: When drilling the wall hole, make sure to avoid
wires, plumbing, and other sensitive components.
4. Pass the drain hose through the wall hole. Make sure
the water drains to a safe location where it will not
cause water damage or a slipping hazard.
NOTE: The drainpipe outlet should be at least 5cm (1.9")
above the ground. If it touches the ground, the unit may
become blocked and malfunction. If you discharge the
water directly into a sewer, make sure that the drain has
a U or S pipe to catch odors that might otherwise come
back into the house.
Page 14
Wall
Indoor