Panasonic CS-E18SD3UAW service manual - Page 40

 Connect the indoor unit and the remote control receiver 5. (Refer to the illustration.)  Fix the green wire from receiver cable 8 to the grounding location provided inside control board. Receiver cable 8 Control box Remote control receiver 5 11.1.4 Connecting the Drain Piping  Lay the drain piping so as to ensure drainage.  Use a locally purchased VP20 general rigid PVC pipe (outer diameter ø1 1/32" (ø26)) for the drain piping and firmly connect the indoor unit and the drain piping using supplied hose band to ensure that no leakage occurs.  Drain piping located indoor should always be insulated by wrapping with locally purchased insulation (foamed polyethylene with a thickness of 13/32" (10 mm) or more).  The drain piping should have a downward gradient (1/100 or more) and should be secured by using pipe hanging equipment to avoid creating hills or traps partway.  Should there be any obstacle preventing the drain piping from being extended smoothly, the drain piping can be raised outside of the main unit as shown in the illustration below. Unit drain port Hose band # Hard PVC pipe (VP20) Drain hose @ Do not use adhesive. Adhere with PVC adhesive. Drain hose insulation $ 1 1/32" (26) 1 1/32" (26) 5 1/8" (130) Rise Hill At least 1/100 Good Trap 11 13/16" (300 mm) or less (not a downward gradient) 19 11/16" (500 mm) or less  Strictly do not install and extend the drain piping from the main unit drain water outlet horizontally or upward or raised it 19 11/16" (500 mm) or more. Doing so may result in poor drainage or drain motor failure.  Do not use drain hose bent at 90° angle. (The maximum permissible bend is 45°.) 11.1.5 Insulating the Refrigerant Piping  After the piping is connected, insulate. (Refer to the illustration) Wrap firmly with vinyl tape, leaving no gaps. Unit side Clamper ! Wrap firmly with vinyl tape, leaving no gaps. Flare insulator 0 40