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Indoor Condensate Drain Piping
Observe all local sanitary codes when installing condensate drains.
It is recommended to install the condensate drain system with hard polyvinyl chloride (PVC) pipe and matching
connectors. Use piping of the same diameter as the unit connection, or of the same diameter of the raising section.
The Ceiling Cassette drainage port diameter is 1 in. (25 mm) OD.
Pitch the condensate drain pipe at a gradual 2.5% pitch (Example: 1/4 in. drop over a 10 in. length) without obstructions.
Use pipe hanger/brackets to support the condensate drain pipe from dropping.
NOTE:
Insulate condensate hose and/or pipes to prevent sweating which may cause water stains or wall damage.
If a gradual pitch from the drainage port is not obtainable, the Ceiling Cassette contains an internal condensate drain
pump with limited head or lift. The condensate drain pipe may have a vertical height of 39-in. maximum above the unit
drainage port within the first 12-in as long as the remaining condensate drain pipe gradually descends from that point and
is aligned with drainage port.
Use an auxiliary condensate pump with float valve for vertical height greater than 39-in. above the unit drainage port. A
float valve is recommended to shut off the system if the auxiliary pump fails.
Completing Condensate Drainage Piping
Include the exterior section of condensate hose in the
pipe/wire bundle.
Fasten the refrigerant and condensate pipe assembly
to the exterior wall for support.
The drain pipe should terminate 6 inches above grade.