Mitsubishi Electric PUZ-HA NKA1 Serie Manuel D'installation page 4

2. Installation location
(D)
(A)
en
3
(A)
(B)
(E)
(C)
Fig. 2-1
mm (inch)
Fig. 2-2
Fig. 2-3
Fig. 2-4
(B)
Fig. 2-5
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.
(A) Pipe length
(one way)
HA30, HA36, HA42 Max. 75 m, 245 ft *1 Max. 30 m,100 ft
*1. If outdoor unit is connected to the A-COIL indoor unit (PAA-A30, 36), pipe length
is "Max. 30 m, 100 ft".
• Height difference limitations are binding regardless of which unit, indoor or out-
door, is positioned higher.
(D) Indoor unit
(E) Outdoor unit
2.2. Choosing the outdoor unit installation location
• 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.
2.3. Outline dimensions (Outdoor unit) (Fig. 2-2)
2.4. Ventilation and service space
2.4.1. Windy location installation
When installing the outdoor unit on a rooftop or other location unprotected from the
wind, situate the air outlet of the unit so that it is not directly exposed to strong winds.
Strong wind entering the air outlet may impede the normal airflow and a malfunction
may result.
The following shows three examples of precautions against strong winds.
(1) Face the air outlet towards the nearest available wall about 500 mm, 19-11/16
inches away from the wall. (Fig. 2-3)
(2) Install an optional air protect guide if the unit is installed in a location where strong
winds from a typhoon, etc. may directly enter the air outlet. (Fig. 2-4)
(A) Air protect guide
(3) Position the unit so that the air outlet blows perpendicularly to the seasonal wind
direction, if possible. (Fig. 2-5)
(B) Wind direction
(B) Height (C) Number of
difference bends (one way)
Max. 15