Refrigerant Piping Work - Hitachi RCD-0.8FSN3 Installation And Operation Manual

REFRIGERANT PIPING WORK

c. Ceiling Not Completed with Panels yet
When the false ceiling is not completed yet, attach the
pattern board to the indoor unit with the screw (M6),
as shown in the figure. And specify the location of the
opening. Adjust the position of the indoor unit as the
procedure (a) after ceiling is completed with the panel
Dimension for
opening
Pattern Board
Indoor unit
Ceiling surface
6 Tighten two nuts of each suspension bolt after the
adjustment is completed. Apply LOCK-TIGHT paint to the
suspension bolts and nuts in order to prevent them from
loosening. Adjust the indoor unit to the correct position,
using the checking scale.
?
N O T E
While adjusting the space between the indoor unit and the ceiling
surface, keep the indoor unit level. Otherwise, it may cause a
malfunction of the float switch. Check the levelness of the unit with
a level.
Drain pipe
Level
Vinyl tube
15 REFRIGERANT PIPING WORK
Before refrigerant piping work, drain piping work and insulation
are required. Refer to the Chapter
!
D A N G E R
• Do not perform refrigerant piping work, drain pumping,
and refrigerant charge without referring to the technical
documentation of the outdoor unit.
20 PMML0425A rev.0 - 02/2016 - P5415720
Dimension for
opening
Suspension bolt
Screw (M6)
Pattern Board
Bracket for air
panel
"16 Drain piping" for details.
Check the levelness at each corner (•) of the unit with a level
or by pouring water to the clear vinyl tube as shown in the
figure.
7 The upper surface of the unit is protected by corrugated
cardboard to prevent the unit from being damaged by
spatter, etc. When mounting the air panel (optional), check
to ensure that welding around the unit has been finished
before removing the corrugated cardboard.
14.3.4 Installation of Air Panel
1 Check the distance between the indoor unit and the false
ceiling. It is 47+5 mm as shown in the figure. If not, adjust
the distance by using the checking scale with maintaining
the levelness of the indoor unit.
2 Check that the fixing screws for the panel are tightened.
Tighten the fixing screws for the panel until touching the
stopper to the suspension bracket.
?
N O T E
Pay attention to the distance between the indoor unit and the false
ceiling. If it is 52mm or more, it may cause dew condensation by
leaking air from the seal packing (Field-Supplied).
3 Check the indoor unit height from the false ceiling surface.
Suspension
bracket
Ceiling surface
14.3.5 Installation of Remote Control Switch
For details on installation of the remote control switch, refer to
the technical documentation of the product.
• Use the specified non-flammable refrigerant (R410A) to the
outdoor unit in the refrigerant cycle. Do not charge material
other than R410A into the unit such as hydrocarbon refrigerants
(propane or etc.), oxygen, flammable gases (acetylene, etc.)
or poisonous gases when installing, maintaining and moving.
These flammables are extremely dangerous and may cause an
explosion, a fire, and injury.
(mm)