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Refrigerant Piping Connections
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REFRIGERANT PIPING CONNECTIONS
• Always include insulation on all refrigerant and drain piping to 
ensure condensate does not form and cause damage to walls, 
floors, etc.
• Positioning the drain hose at the top of the bundle can cause con-
densate to overflow from the drain pan in the inside of the indoor 
unit.
• )RUV\VWHPVZLWKZLULQJJUHDWHUWKDQIHHWVHHWKH³&RPPX-
nication / Connection (Power) Cable Specifications from Outdoor 
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information.
Bundling
If a conduit or piping set cover is not used on the connection from 
the outdoor unit to the interior, bundle both separately insulated 
refrigerant pipes, the drain hose, and outdoor unit to indoor unit 
communication / connection (power) cable together with wide vinyl 
tape. 
1.  Both piping must be fully and separately encased in insulation 
material: Overlap the field installation piping insulation material 
and the indoor unit piping insulation material. Verify that any 
insulation material cutting lines are placed upward.
2.  Bind together the two pipes, using vinyl tape. Make sure there 
are no gaps during the binding.
3.  Wrap the rear piping section with narrow vinyl tape.
4.  Continue to wrap the indoor unit pipe as connected to the outdoor 
connection pipe.
5.  Using a wider vinyl tape, bundle the piping and drain hose togeth-
er. Install the wider vinyl tape from the bottom up.
• Tape must be sufficient to cover the piping in order to fit into the 
rear piping housing area at the back of the indoor unit.
Figure 66: Bundling the Connection Components (From Outdoor Unit to 
Indoor Unit).
Figure 67: Cutaway of Proper Pipe and Cable Bundling.
Vinyl tape (narrow)
Connection pipe
Connecting cable
Vinyl tape (wide)
Wrap with vinyl tape
Indoor unit pipe
Pipe
Cut Line at Top
Figure 68: Cutaway of Proper Pipe and Cable Bundling.
Bundling
Piping
Connection
Cable 
Tape
Drain Hose