Hitachi R410A Manuel D'installation page 7

6.1.1. Installing body
Cealing openings and hanging bolt installation diagram
When fastening the hangers, make the bolt positions
uniform.
530 (20-7/8) (Hanging bolt position)
135 (5-5/16) 250 (9-27/32)
Service access
Min. 450 (17-23/32)
Drain pipe (O.D. ø26.1) (1-1/32)
102 (4-1/32)
Control box
Ceiling
x
Be sure to leave service access for future service at the designated
position.
(1) Install special nut A, then special nut B onto the hanging
bolt.
(2) Raise the body and mount its hooks onto the hanging bolt
between the special nuts.
(3) Turn special nut B to adjust the height of the body.
Perform ¿ nal tightening by tightening the double nut
¿ rmly.
9374318438-05_IM.indb 7
WARNING
Unit: mm (in.)
Unit: mm (in.)
40 (1-9/16) 99 (3-29/32)
Gas pipe
Liquid pipe
WARNING
Special nut A
Hook
Special nut B
30 (1-3/16)
Hanging bolt
or more
19 (3/4)
6.1.2. Leveling
Using a level, or vinyl hose ¿ lled with water, ¿ ne adjust so that
the body is level.
6.1.3. Installing drain pipe
Note: Install the drain pipe.
x
Install the drain pipe with downward gradient (1/50 to
1/100) and so there are no rises or traps in the pipe.
x
Use general hard polyvinyl chloride pipe [3/4 in. (O.D.
1-1/16 in)] and connect it with adhesive (polyvinyl chlo-
ride) so that there is no leakage.
x
When the pipe is long, install supporter.
x
Do not perform air bleeding.
x
Always heat insulate indoor section of drain pipe.
x
When desiring a high drain pipe height, raise it up to 700 mm
(27-9/16 in.) or less from the ceiling within a range of 300 mm
(11-13/16 in.) from the body. A rise dimension over this range
will cause leakage. See ¿ gure on next page.
x
Set up the entire piping lines at the position 100 mm
(3-15/16 in.) lower than the main body drain port, and use
the piping lines O.D. 33 mm (1-5/16 in.) or more with the
descending inclination to 1/100 or more.
bitions
NG:Rise
Drain pipe
Unit: mm(in.)
After installing the
body, tighten the nuts.
Ceiling
Vinyl hose
NG:air bleeding
NG:trap
Pipe Size
3/4 in. (O.D. 1-1/16 in.)
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