Installing The Outdoor Unit - Mitsubishi Electric Mr. SLIM PUZ-A NHA3 Series Installation Manual

2. Installation location
Fig. 2-3
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.
Face the air outlet towards the nearest available wall about 50 cm, 19-11/16 inch
away from the wall. (Fig. 2-3)
Install an optional air outlet guide and air 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)
Air outlet guide
Position the unit so that the air outlet blows perpendicularly to the seasonal wind
direction, if possible. (Fig. 2-5)
Wind direction

3. Installing the outdoor unit

M10(3/8")bolt
Base
As long as possible.
Vent
Set deep in the ground.
A12, A18
Min. 25-19/32
19-11/16 19-11/16
Min. 13-25/32
5-29/32 5-29/32
31-1/2
Fig. 3-1
4
Fig. 2-4 4
Fig. 2-5
A12, A18 A24-A42
A24-A42
Min. 14-3/16
23-5/8 23-5/8
Min. 13/32
6-7/8
37-13/32
2.4.2. When installing a single outdoor unit (Refer to the last page)
Minimum dimensions are as follows, except for Max., meaning Maximum dimen-
sions, indicated.
The figures in parentheses are for A42 models.
Refer to the figures for each case.
Obstacles at rear only (Fig. 2-6)
Obstacles at rear and above only (Fig. 2-7)
Obstacles at rear and sides only (Fig. 2-8)
* 350mm, 13-25/32 inch for A12, A18
Obstacles at front only (Fig. 2-9)
* When using an optional air outlet guide, the clearance for A42 models is 500 mm,
19-11/16 inch or more.
Obstacles at front and rear only (Fig. 2-10)
* When using an optional air outlet guide, the clearance for A42 models is 500 mm,
19-11/16 inch or more.
Obstacles at rear, sides, and above only (Fig. 2-11)
* 350mm, 13-25/32 inch for A12, A18
• Do not install the optional air outlet guides for upward airflow.
2.4.3. When installing multiple outdoor units (Refer to the last page)
Leave 350 mm, 13-25/32 inch for A18 and 10 mm, 13/32 inch for A24-A42 space
or more between the units.
Obstacles at rear only (Fig. 2-12)
Obstacles at rear and above only (Fig. 2-13)
• No more than three units must be installed side by side. In addition, leave space as shown.
• Do not install the optional air outlet guides for upward airflow.
Obstacles at front only (Fig. 2-14)
* When using an optional air outlet guide, the clearance for A42 models is 1000 mm,
39-3/8 inch or more.
Obstacles at front and rear only (Fig. 2-15)
* When using an optional air outlet guide, the clearance for A42 models is 1000 mm,
39-3/8 inch or more.
Single parallel unit arrangement (Fig. 2-16)
* When using an optional air outlet guide installed for upward airflow, the clearance is 500
(1000) mm, 19-11/16 (39-3/8) inch or more.
Multiple parallel unit arrangement (Fig. 2-17)
* When using an optional air outlet guide installed for upward airflow, the clearance is 1000
(1500) mm, 39-3/8 (59-1/16) inch or more.
Stacked unit arrangement (Fig. 2-18)
• The units can be stacked up to 2 units high.
• No more than two stacked units must be installed side by side. In addition, leave space as
shown.
• Be sure to install the unit in a sturdy, level surface to prevent rattling noises dur-
(inch)
ing peration. (Fig. 3-1)
<Foundation specifications>
Foundation bolt
Thickness of concrete
Length of bolt
Weight-bearing capacity
• Make sure that the length of the foundation bolt is within 30 mm, 1-3/16 inch of
the bottom surface of the base.
• Secure the base of the unit firmly with four-M10 foundation bolts in sturdy locations.
Installing the outdoor unit
• Do not block the vent. If the vent is blocked, operation will be hindered and break-
down may result.
• In addition to the unit base, use the installation holes on the back of the unit to at-
tach wires, etc., if necessary to install the unit. Use self-tapping screws (ø5 × 15
mm, ø13/16 × 19/32 inch or less) and install on site.
Warning:
• The unit must be securely installed on a structure that can sustain its
weight. If the unit is mounted on an unstable structure, it may fall down and
cause damage or injuries.
• The unit must be installed according to the instructions in order to mini-
mize the risk of damage from earthquakes, typhoons, or strong winds. An
(inch)
incorrectly installed unit may fall down and cause damage or injuries.
6-7/8
M10 (3/8")
120 mm, 4-23/32 inch
70 mm, 2-3/4 inch
320 kg, 264 lbs