Mitsubishi Heavy Industries FDC112KXEN6 Technical Manual page 240

(iv) Drain piping
The drain piping can be directed to the floor or rear sides as follows.
(a) Connect a drain piping to the drain outlet and fix it by use of tigghening band.
(b) Indoor side drain piping must be thermally insulated.
(c) After finishing the drain piping, check the drainage by pouring some water in the drain pan.
ecrine
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Up-and-down bend
Bad
Bad
Trap