-
178
-
b) Limit the protrusion height of front side anchor bolts to 15 mm at the maximum.
c) Install the unit firmly so that it does not fall by earthquake and strong wind.
d) Make the concrete foundation by referring the above illustration.
e) Install the unit in level. (The height difference between right and left is within 5 mm.)
f) In an area where temperature drops below zero for several days in a row, install the unit on the concrete base of which
top is elevated by 30mm or more from the ground level (measurement marked with * in the drawing).
(Because of freezing, drain water could otherwise be blocked from running freely).
Height difference
●
When the position of outdoor unit is higher than that of the indoor unit, keep the difference H=30 m or less.
●
When the position of outdoor unit is lower than that of the indoor unit, keep the difference H=15 m or less.
(2)
Refrigerant piping work
Select the piping specification to fit the specification of indoor unit and installation location.
(a)
Decision of piping specification
(b)
Points for attention in installing refrigerant piping
1) Use pipes made of the following material
Material: Phosphorus deoxidized copper seamless pipes (C1220T, JIS
H3300)
2) Please dress the refrigerant piping (both gas and liquid pipes) with a heat
insulating material for prevention of dew condensation. Improper heat
insulation incapable of preventing dew condensation can cause the leak-
ing or dripping of water and a resultant soaking of household effects.
3) Use only a good heat insulating material (120
°
C or higher) for heat insu-
lation. A poor heat insulating material offers only poor heat insulation
and can cause cable deterioration.
a) The gas pipes can cause dew condensation during a cooling opera-
tion, which may become drain water causing a water-leak accident,
or a risk of burns during a heating operation, if touched accidentally,
with its surface reaching a high temperature because of discharged
gas flowing inside. So, do not fail to dress it with a heat insulating
material to prevent such mishap.
b) Dress the flare joints of the indoor units with a heat insulating mate-
rial (pipe covers) (for both gas and liquid pipes).
c) Dress both gas and liquid pipes with a heat insulating material. In
doing so, leave no gaps between the pipe and the heat insulating ma-
terial and wrap them, together with the connecting cable, with a dress-
ing tape.
Exterior tape
Gas piping
Liquid piping
Wires for connecting
indoor and outdoor
units
Insulation
A
9.1
13.2
16.6
19.7
ø6.35
ø9.52
ø12.7
ø15.88
0
-0.4
A
Copper
pipe outer
diameter
Flared pipe end: A (mm)
Outdoor unit
Item
Liquid pipe
Indoor unit
combinations Main pipe Branch pipe Main pipe
φ
9.52
t 0.8
φ
9.52
t 0.8
φ
12.7
t 0.8
φ
15.88
t 1.0
Branch pipe
Gas pipe
Model
FDCVA302 151
151
Indoor unit
Liquid line
Gas line
1
2
Chart of shapes of branch piping parts (DIS-WA1)
Gas pipe
Liquid pipe
Reducer
Mark
Mark
Mark
24
210
8
105
50
8
11
ID15.88
ID15.88
ID15.88
ID9.52
ID9.52
ID9.52
ID9.52
OD15.88
2 piece
2 piece
ID12.7
φ
6.35
flared nut
11
48
180
8
80
10
1
2
3
4
3
3
4
4
Note (1)
1
to
4
in the drawing include parts provided in the branch piping set. It shows
the codes for the shapes of different-diameter connections.
Note (1) If you are using this model in combination with the 151 Series indoor units, use the irregular fittings
3
supplied
with the branch piping set and make the branch piping (branch ~ indoor unit) liquid piping size
φ
9.52.
< 2-Way branch >
Floor
Floor
Floor
Mount
sections level with the floor.
Mount sections
perpendicular to the floor.
The branch piping (both gas and liquid lines) should always be arranged to have a level or perpendicular branch.
(Example)
