Pipe Installation - Hitachi R410A Manuel D'installation

300 (11-13/16)
Attach drain hose
Attach band
Downward gradient
Downward gradient 1/100 or more
O.D. 33 (1-5/16) or more
Prohibitions
Do not insert the drain piping into the sewer where
sulfurous gas occurs. (Heat exchange erosion may
occur)
Insulate the parts properly so that water will not drip
from the connection parts.
Check for proper drainage after installation by using
the visible portion of transparent drain port and the
drain piping ¿ nal outlet on the body.
Do not apply adhesive agent on the drain port of the
body. (Use the attached drain hose assembly to con-
nect the drain piping)
Installation procedure
1) Install the attached drain hose to the drain port of the body.
Install the hose band from the top of the hose within the
shown in the ¿ gure area.
2) Use PVC glue to glue the drain piping (PVC pipe [3/4 in.
(O.D. 1-1/16 in)]) to the drain hose assembly.
(Apply color adhesive agent evenly until the gauge line and
seal)
3) Check the drainage. (See separate diagram)
4) Install the heat insulation.
5) Use the attached heat insulation to insulate the drain port
and hose band.
En-8
9374318438-05_IM.indb 8
Unit: mm (in.)
Downward gradient
1/100 or more
3/4 in.
(O.D. 1-1/16 in)
(Local
arrangement)
1 .5m~2m
Hanging fitting
(5' - 6' 6")
3/4 in.
1/100~1/50
NG:air bleeding
WARNING
CAUTION
Install the knob facing upward
Hose band
(a) Top view
5〜10 （ 3/16〜13/32）
20 （ 25/32）
20 （ 25/32）
Transparent
visible portion
(c) Hose opening view
Wind the attached heat insulation
around the hose band
Make sure the alignment
is on top
Note)
Check for drainage
Pour about 1 liter of water from the position (see 9.4.Test run/
CHECKING DRAINAGE). Check for any abnormalities such
as strange noises and whether the drain pump functions nor-
mally

6.2. Pipe installation

CAUTION
Be careful that foreign matter (oil, water, etc.) does not enter
the piping with refrigerant R410A models. Also, when storing
the piping, securely seal the openings by pinching, taping,
etc.
While brazing the pipes, be sure to purge with dry nitrogen
gas.
Attach hose band
(Accessories)
Locally installed
PCV pipe
Attach drain hose
(Accessories)
Attach heat insulation
(Accessories)
Unit: mm (in.)
(b) Side view
19
(3/4)
Applying area
of adhesive
35 （ 1-3/8）
Gauge line
4 （ 5/32） or less
・ Top view
Make sure there
are no gaps
9/10/2010 11:10:08 AM