Installation Location; Ventilation And Service Space - Mitsubishi Electric PUMY-P36NHMU3 Manuel D'installation

2. Installation location

Fig. 2-2
en
3
(inch)
Fig. 2-1
A
Fig. 2-3
B
Fig. 2-4
2.1. Refrigerant pipe
Refer to Fig. 4-1.
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 accumu-
late.
• 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 location
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. 2-1)
2.4. Constraints on indoor unit installation
You should note that indoor units that can be connected to this outdoor unit have
the following constraints.
• Indoor units with model in table 2 can be connected.
• For the number of units that can be connected, refer to Table 1 below.
• The total rated capacity (cooling) of the connected indoors units (refer to Table 2)
must not exceed 130% of the outdoor unit capacity (refer to the capacity range of
connected units in Table 1).
Table 1: Number of units that can be connected and capacity range of connected units
Outdoor unit The capacity of
model name outdoor unit
PUMY-P36NKMU3
36 kBtu/h
PUMY-HP36NKMU1
PUMY-P48NKMU3
48 kBtu/h
PUMY-HP48NKMU1
PUMY-P60NKMU3 60 kBtu/h
Table 2: Rated capacity (cooling) of the indoor units
Indoor unit type P04 P05 P06 P08 P12 P15 P18 P24 P30 P36 P48 P54 P72
Rated capacity
(Cooling) 4 5 6 8
(kBtu/h)
Example: PUMY-P48NKMU3
PEFY-P24 = 24
+
Total rated capacity
PEFY-P18 = 18
60 ≤ 62.4 kBtu/h
+
PEFY-P18 = 18
Combinations in which the total capacity of indoor units exceeds the capacity of the
outdoor unit will reduce the cooling capacity of each indoor unit below their rated
cooling capacity. Thus, combine indoor units with an outdoor unit within the outdoor
unit's capacity, if possible.

2.5. Ventilation and service space

Note:
The dimensions given along the arrows above are required to guarantee the
air conditioner's performance. Install the unit in as wide a place as possible
for later service or repairs.
2.5.1. 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 50 cm (19-11/16")
away from the wall. (Fig. 2-2)
2 Install an optional wind baffle if the unit is installed in a location where strong
winds from a typhoon, etc. may directly enter the air outlet. (Fig. 2-3)
A Wind baffle
3 Position the unit so that the air outlet blows perpendicularly to the seasonal wind
direction, if possible. (Fig. 2-4)
B Wind direction
Number of units that Capacity range of
can be connected connected units
1 - 11 units 18 - 46.8 kBtu/h
1 - 12 units 24 - 62.4 kBtu/h
1 - 12 units 30 - 78.0 kBtu/h
12 15 18 24 30 36 48 54 72