50
Multi V W
all-Mounted Indoor Unit
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Indoor Unit Condensate Drain Hose Installation
All Gallery and wall-mounted indoor units apply the gravity drain method, but a field-supplied condensate pump can be installed (optional,
sold separately). Depending on the location of the indoor unit, condensation can be drained directly to the outside of the building, or a com
-
mon indoor unit drainage piping system can be installed.
Gallery and wall-mounted indoor units have a built-in drain hose that can be extended. The drain hose is routed from the indoor unit through
the structure (wall) to the outside or to a drainage system. Any holes through the ceilings, walls, etc., must be large enough to accommodate
the drain piping and insulation.
The drain hose must slope at an angle where it is higher at the indoor unit and lower toward the outside or drainage system (about 1/50 to
1/100 down slope), thereby letting gravity push any condensation down and out.
When the bottom surface of the indoor unit is at an elevation below the receiving building drain line connection, install an inverted trap at the
top of the condensate pump discharge riser before connection to the building drain pipe.
When the receiving drain line is mounted horizontal, connect the inverted trap to the top half of the pipe. The connection point of the inverted
trap to the building drain pipe must always be to the top half of the pipe and must never be over 45° either side of the upper most point of the
horizontal building drain line.
If connecting to a vertical drain line or plumbing system vent line, connect the IDU condensate pump discharge line using a Y-45 fitting with
the double end of the Y-45 fitting facing up. When connecting to a vertical drain line, include an inverted trap at the top of the IDU condensate
pump discharge riser before connection to the Y-45 fitting.
Note:
When making condensate pipe connections, be careful not to exert lateral force on the drain nipple. Internal damage may occur.
Do not provide up and down slope to prevent reversal flow.
Figure 58: Correct Slope Angle for Drain Hose (SV Frame).
Drain hose
Connecting
REFRIGERANT PIPING CONNECTIONS
Indoor Unit Drain Hose
Correct Slope Angle for Drain Hose, Through the Wall View (SV Frame)
