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Service Manual 37
Installation
2) Form the piping
1. Form the piping by wrapping the connecting por-
tion of the indoor unit with insulation material and
secure it with two kinds of vinyl tapes.
■ If you want to connect an additional drain hose, the
end of the drain outlet should be routed above the
ground. Secure the drain hose appropriately.
2. In cases where the outdoor unit is installed below
the indoor unit perform the following.
■ Tape the piping, drain hose and connecting cable
from down to up.
■ Secure the tapped piping along the exterior wall
using saddle or equivalent.
Taping
Drain hose
Pipings
Connecting cable
Trap is required to prevent water
from entering into electrical parts.
Seal small openings
around pipings with a
gum type sealer.
3. In cases where the Outdoor unit is installed above
the Indoor unit perform the following.
■ Tape the piping and connecting cable from down to
up.
■ Secure the taped piping along the exterior wall.
Form a trap to prevent water entering the room.
■ Fix the piping onto the wall by saddle or equivalent.
Seal a small opening
around the pipings
with gum type sealer.
Trap
Trap
1) Checking the drainage
1. To check the drainage.
■ Pour a glass of water on the evaporator.
■ Ensure the water flows through the drain hose of the
indoor unit without any leakage and goes out the
drain exit.
2. Drain piping
■ The drain hose should point downward for easy
drain flow.
■ Do not make drain piping.
Downward slope
Do not raise
Accumulated
drain water
Tip of drain hose
dipped in water
Air
Waving
Water
leakage
Water
leakage
Ditch
Less than
50mm gap
Water
leakage
Checking the Drainage and forming the pipings