Installation manual
22
FWF
Fan coil units
4PW64524-1 – 09.2010
4 Install the fan coil unit
■
Keep piping as short as possible and slope it downwards at a gradient of at least 1/100 so
that air does not remain trapped inside the pipe. Refer to
“Drain pipe installation” on
page 21
.
If the drain hose cannot be sufficiently set on a slope, fit the drain hose with a drain
raising piping (field supply) as illustrated in the figure below.
Fig. 4.17: How to perform drain piping
■
Keep pipe size equal to or greater than that of the connecting pipe (20 mm inner
diameter).
■
Install the drain raising pipes at a height of less than 545 mm.
■
Install the drain raising pipes at a right angle to unit and no more than 300 mm from the
unit.
■
To prevent air bubbles, install the drain hose level or slightly tilted up (
≤
75 mm).
■
Insulate the complete drain piping inside the building.
Fig. 4.18: Unifying multiple drain pipes
Perform the drain piping work
≤
3
00
0
~
545
205
≤
750
1
~
1.5 m
0
~
75
a
b
d
d
c
e
a
Ceiling slab
b
Hanger bracket
c
Drain raising pipe (nominal diameter = 20 mm)
d
Drain hose (delivered with the unit)
e
Metal clamp (delivered with the unit)
Information
When unifying multiple drain pipes, install the pipes as illustrated in the figure
below. Select converging drain pipes whose size is suitable for the operating capacity
of the unit.
≥
100
0
~
675
a
a
a
a
a
T-joint converging drain pipes
Summary of Contents for FWF02B7TV1B
Page 39: ...NOTES...
