Fujitsu AIRSTAGE J-IIIL Design & Technical Manual page 592

¢ High static pressure duct type
• Main drain pipe
H1 = 4 in (100 mm) or more
H2 = 2 - 4 in (50 - 100 mm)
– Be sure to provide a drain trap for each indoor units.
– The drain trap will have no effect if placed after multiple indoor units.
– The position of the installed drain hose should have a downward slope of 1/100 or more.
– Make sure that the drain hose is installed without rises.
– Make the trap near to the indoor unit, position the trap in a location where it can be cleaned.
• Safety drain pipe
There is no need to provide a trap for the overflow drain. If the overflow drain is connected to the
main drain pipe, make the connection below the trap on the main drain pipe. Once installation is
completed, checked the flow of the drain water.
5-2. Indoor unit
Unit
Drain hose (main)
Drain pipe (main)
Unit
Drain hose (safety)
Drain pipe (safety)
- (06-70) -
H 1
H 2
Trap
60 to 79 in
(1.5 to 2.0 m)
Drain hose (main)
Drain pipe (main)
5. Drain connection