en
3
1. Safety precautions
1
Fig. 1-1
1.6. Accessories of outdoor unit (Fig. 1-1)
(ZM200/250, M200/250)
The parts show in the left are the accessories of this unit, which are affixed to the
inside of the service panel.
1
Joint Pipe accessory .........×1
(1) Put flare nut which is removed from the Ball Valve on the Joint Pipe accessory
and carry out flare work.
(2) The Joint Pipe accessory and the pipe which is prepared on site must be brazed
in non-oxidation status.
(3) After the pipes are brazed, connect the Joint Pipe accessory to the Ball Valve
which locates within the unit by flare connection.
* Never connect the Joint Pipe accessory to the Ball Valve before brazing. Some
parts may be burnt and it may cause refrigerant leakage.
950
330
+30
94
3 (
13
50
)
175
600
370
2. Installation location
Fig. 2-1
2.1. Refrigerant pipe (Fig. 2-1)
► Check that the difference between the heights of the indoor and outdoor
units, the length of refrigerant pipe, and the number of bends in the pipe are
within the limits shown below.
Models
A
Pipe length
(one way)
B
Height difference
C
Number of bends
(one way)
ZM200/250
Max. 100 m
Max. 30 m
Max. 15
M200/250
Max. 70 m
Max. 30 m
Max. 15
•
Height difference limitations are binding regardless of which unit, indoor or out-
door, is positioned higher.
D
Indoor unit
E
Outdoor unit
A
B
E
D
C
2.2. Choosing the outdoor unit installation location
/
R32 is heavier than air—as well as other refrigerants—so tends to accumulate at
the base (in the vicinity of the floor). If R32 accumulates around base, it may reach
a flammable concentration in case room is small. To avoid ignition, maintaining a
safe work environment is required by ensuring appropriate ventilation. If a refrig-
erant leak is confirmed in a room or an area where there is insufficient ventilation,
refrain from using of flames until the work environment can be improved by ensur
-
ing appropriate ventilation.
•
Avoid locations exposed to direct sunlight or other sources of heat.
•
Select a location from which noise emitted by the unit will not inconvenience
neighbors.
•
Select a location permitting easy wiring and pipe access to the power source and
indoor unit.
• Avoid locations where combustible gases may leak, be produced, flow, or accu
-
mulate.
•
Note that water may drain from the unit during operation.
•
Select a level location that can bear the weight and vibration of the unit.
•
Avoid locations where the unit can be covered by snow. In areas where heavy
snow fall is anticipated, special precautions such as raising the installation loca-
tion or installing a hood on the air intake must be taken to prevent the snow from
blocking the air intake or blowing directly against it. This can reduce the airflow
and a malfunction may result.
•
Avoid locations exposed to oil, steam, or sulfuric gas.
•
Use the transportation handles of the outdoor unit to transport the unit. If the unit
is carried from the bottom, hands or fingers may be pinched.
•
Refrigerant pipes connection shall be accessible for maintenance purposes.
/
Install outdoor units in a place where at least one of the four sides is open, and in
a sufficiently large space without depressions. (Fig. 2-2)
Fig. 2-2
OK
OK
OK
NG
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