Table of Contents
Advertisement
5.1 General information
INCORRECT
Incorrect: Upward Slope
Incorrect: Rising Part
!
C A U T I O N
• Do not create an upper-slope or rise for the drain piping, since drain water will flow back to the
unit and leakage to the room will occur when the unit operation is stopped.
• Do not connect the drain pipe with sanitary or sewage piping or any other drainage piping.
• When the common drain piping is connected with other indoor units, the connected position of
each indoor unit must be higher than the common piping. The pipe size of the common drain pipe
must be large enough according to the unit size and number of unit.
• Drain piping will require insulating if the drain is installed in a location where condensation
forming on the outside of drain pipe may drop and cause damage. The insulation for the drain
pipe must be selected to insure vapor sealing and prevent condensation forming.
• Drain trap should be installed next to indoor unit. This trap must be designed to good practice
and be checked with water (charged) and tested for correct flow. Do not tie or clamp the drain
pipe and refrigerant pipe together.
NOTE
Install drainage in accordance with national and local codes.
After performing drain piping work and electrical wiring, check to ensure that water flows
smoothly as in the following procedure:
◆ Checking with drain-up mechanism and float switch
• Switch ON the power supply.
• Pour approximately 2.0 to 2.5 liters of water gradually into the drain pan, then float switch up
and drain pump start working automatically.
• Check to ensure that the water flows smoothly inside the transparent drain pipe connection
whether no water leakage occurs. When water cannot be found at the end of the drain piping,
pour more water smoothly into the drain pan.
• If the water overflows from the drain pan, recheck the drain piping.
• Switch OFF the power supply after.
PMEN0649 rev.0 - 03/2023
CORRECT
1/25 to 1/100
Down-Slope
Drain piping of unit side
Min. 100mm
(higher as possible)
Vinyl chloride pipe (VP25)
This drain piping shall be
separating from others pipes
Common drain piping (Min.VP30)
(Down slope from rising part)
5
24
Advertisement
Table of Contents
