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4. DRAINAGE PIPE INSTALLATION
Install the drain pipe to ensure proper drainage.
1. Use a pipe diameter equal to or larger than that of the connecting pipe (PVC pipes with a nominal diameter of 25mm and an external diameter
of 32mm).
2. Make the pipe length as short as possible and incline the pipe downward at a ratio of 1/100 or greater to prevent the accumulation of air.
3. Install pipe supports at intervals of 1.0m to 1.5m to prevent defl ection.
4. Use a new drain hose and hose bands when replacing the drain pump kit with a new one.
1~1.5m 1~1.5m
CAUTION
• The height of the drain-up pipe must be 750mm or less relative to the indoor unit drain outlet.
• The rising drain-up pipe must be installed vertically.
Drain-up piping
(Field supply)
• Refer to the fi gure below for concentrated drain piping.
5. ELECTRICAL WIRING
Perform electrical wiring for the drain pump kit properly as follows.
CAUTION
• Be sure to turn OFF the power to the indoor unit before starting the procedure below.
1. Remove the indoor unit control box cover.
2. Insert drain pump and fl oat switch lead wires through the rubber bush on the hanging bracket. Route and connect the lead wires to the printed
circuit board of the indoor unit (Refer fi gure below).
3. Bind the lead wires together with the drain connecting pipe 1 (included) using cable tie 1 (included).
Note: Do not compress the insulation after install the cable tie. Be sure the lead wire is fi xed close to the indoor unit.
4. Clamp the lead wires inside control box using cable tie 2 (included) and plastic band (included), along the path to PCB, secure with other
hardness wires fi xing band (Refer to fi gure below).
5. Remove the short circuit connector from the X15A terminal on the indoor unit printed circuit board (A1P).
6. Connect the fl oat switch lead wire to the X15A terminal.
7. Connect the drain pump lead wire to the X25A terminal.
8. After completion of the wiring, be sure to organize the wires neatly, bind together and clamp the wires.
9. Install back the indoor unit control box cover.
Packaged Air Conditioner Drain Pump Kit - BDU510B250VM
Pipe support
Ceiling slab
1~1.5m
Pipe support
4
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