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Refrigerant Piping Connections
Due to our policy of continuous product innovation, some specifications may change without notification.
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REFRIGERANT PIPING CONNECTIONS
Drain Caps
Drain Connection
Drain Caps
Drain Cap
Drain
Washer
LSU090-120HSV5
Depending on the installation location, it could be necessary to
install factory-supplied drain plug(s).See pages 12 to 15 for informa-
tion in reference to outdoor unit placement.
Ensure drain piping is insulated. Drain water from the defrost mode will
freeze and build up in the outdoor unit, impairing heating performance,
and even will damage the outdoor unit.
Installing Outdoor Unit Drain Plug / Piping
1. See diagrams at right for drain connection, drain caps, and drain
washer locations specific to each outdoor unit. Components and
location differ depending on model of outdoor unit.
2. Connect field-supplied vinyl condensate piping to the outdoor
unit drain connection. If the field-supplied vinyl piping is too long,
position it to prevent kinks.
Check local codes for materials approved for eld-suppled condensate
drain piping.
Outdoor Unit Drain Piping / Indoor Unit Drain Hose
Outdoor Unit Condensate Drain Piping Installation
Figure 54: Correct Slope Angle for Drain Hose.
Figure 55: HSV5 Outdoor Unit Drain Hose Extension.
Indoor Unit Condensate Drain Hose
Installation
Refer to the diagrams below and follow proper installation and the position of the drain hose
along the refrigerant piping installation path to avoid leaks. After the drain hose is set
in place, always follow with leak / pressure testing and deep evacuation procedures of the
refrigerant piping to be sure all refrigerant piping is properly installed.
Re-check and retest as necessary.
• Remove the drain plug on left or right side depending on the piping installation.
• Insert the drain hose on the left side when left side piping is used; install the drain hose on the right side when right side piping is used.
• Drain hose is routed from the indoor unit through the structure (wall) to the outdoor. It must slope at an angle where it is higher at the
indoor unit and lower toward the outdoor area, thereby letting gravity push any condensation down and out.
• The drain hose might need to be extended so that condensate can be properly routed away.
• The drain hose extension must be properly insulated to ensure condensation will not damage walls, floors, etc. Foamed polyethylene or
equivalent of at least 5/16 inches thick is required.
Downward Slope
to Outdoor
for Proper Drainage
Indoor
Unit
Piping
Figure 52: LSU090-120HSV5 Drain Component Locations.
Indoor Outdoor
Indoor Unit
Drain Hose
Indoor Unit
Drain Hose
Insulation
(>4 to 12 inches long
and 5/16 inches thick)
Drain Hose
Extension
Figure 53: LSU181HSV5 Drain Component Locations.
Drain Connection
LSU181HSV5
Drain
Washer
Drain Caps
Drain
Cap
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