Selection Of Installation Location For The Outdoor Unit; 〇 A Place Where It Is Horizontal, Stable And Can Endure The Unit Weight And Will Not Allow Vibration Transmittance; 〇 A Place Where It Can Be Free From Possibility Of Bothering Neighbors Due To Noise Or Exhaust Air From The Unit; 〇 A Place Where The Unit Is Not Exposed To Oil Splashes - Mitsubishi Heavy Industries FDE40ZMXVG Technical Manual

3) Selection of installation location for the outdoor unit

Be sure to select a suitable installation place in consideration of following conditions.
〇 A place where it is horizontal, stable and can endure the unit weight and will not allow vibration transmittance of the unit.
〇 A place where it can be free from possibility of bothering neighbors due to noise or exhaust air from the unit
〇 A place where the unit is not exposed to oil splashes.
〇 A place where it can be free from danger of flammable gas leakage.
〇 A place where drain water can be disposed without any trouble.
〇 A place where the unit will not be affected by heat radiation from other heat source.
〇 A place where snow will not accumulate.
〇 A place where the unit can be kept away 5m or more from TV set and/or radio receiver in order to avoid any radio or TV interference.
〇 A place where good air circulation can be secured, and enough service space can be secured for maintenance and service of the unit safely.
〇 A place where the unit will not be affected by electromagnetic waves and/or high-harmonic waves generated by other equipment.
〇 A place where chemical substances like sulfuric gas, chloric gas, acid and alkali (including ammonia), which can harm the
unit, will not be generated and not remain.
〇 A place where strong wind will not blow against the outlet air blow of the unit.
Do not install the unit in places which exposed to sea breeze (e.g. coastal area) or calcium chloride (e.g. snow melting agent),
exposed to ammonia substance (e.g. organic fertilizer).

4) Caution about selection of installation location

(1) If the unit is installed in the area where the snow will accumulate, following measures are required.

The bottom plate of unit and intake, outlet may be blocked by snow.

1. Install the unit on the base so 2. Provide a snow hood to
that the bottom is higher than the outdoor unit on site.
snow cover surface.
Regarding outline of a snow
hood, refer to our technical
manual.

Since drain water generated by defrost control may freeze, following measures are required.

●
Don't execute drain piping work by using a drain elbow and drain grommets (optional parts). [Refer to Drain piping work.]
●
Recommend setting Defrost Control (SW3-1) and Snow Guard Fan Control (SW3-2). [Refer to Setting SW3-1, SW3-2.]
●
Attach heater on a base plate on site, if there is possibility to freeze drain water.
In case that the product has a corrective drainage system, the drainage paths should have suitable measure against
freezing but be sure not to melt the material of drainage paths with heat.

(2) If the unit can be affected by strong wind, following measures are required.

Strong wind can cause damage of fan (fan motor), or can cause performance degradation, or can trigger anomalous stop
of the unit due to rising of high pressure.
1.Install the outlet air blow side of the 2.Install the outlet air blow side of
unit to face a wall of building, or the unit in a position perpendicular
provide a fence or a windbreak screen. to the direction of wind.
Over 500 mm
Wind direction

2. REFRIGERANT PIPING WORK

1) Restrictions on unit installation and use

●
Check the following points in light of the indoor unit specifications and the installation site.
●
Observe the following restrictions on unit installation and use. Improper installation can result in a compressor failure or performance degradation.
One-way pipe length difference from the first branching point to the indoor unit
Descriptions
Model for outdoor units
100VN,125VN,100VS,125VS
140VN,140VS
One-way pipe length of
refrigerant piping
100VNX,125VNX,100VSX,125VSX
140VNX,140VSX
100VN,125VN,100VS,125VS
140VN,140VS
Main pipe length
100VNX,125VNX,100VSX,125VSX
140VNX,140VSX
One-way pipe length between the first
140VN,140VS,
branching point from to the second
Triple type
140VNX,140VSX
branching point
Twin type All Models
140VN,140VS,
One-way pipe length after the first
Triple type
branching point
140VNX,140VSX
One-way pipe length after the
140VN,140VS
first branching point and second Triple type
140VNX,140VSX
branching point
Twin type All Models
One-way pipe length difference
from the first branching point to 140VN,140VS,
Triple type
the indoor unit
140VNX,140VSX
One-way pipe length difference
140VN,140VS,
from the second branching point Triple type
140VNX,140VSX
to the indoor unit
When the outdoor unit is positioned higher,
Elevation difference between
indoor and outdoor units
When the outdoor unit is positioned lower,
Elevation difference between indoor units
●
The use restrictions appearing in the table above are applicable to the standard pipe size combinations shown in the table below. Where an existing pipe system is
CAUTION
utilized, different one-way pipe length restrictions should apply depending on its pipe size. For more information, see " 6. UTILIZATION OF EXISTING PIPING."
3. Install the unit under eaves
or providen the roof on site.
3.The unit should be installed on
the stable and level foundation.
If the foundation is not level,
tie down the unit with wires.
Wind direction
Marks appearting in the drawing
< 3m
Dimensional
Triple type A
Single type Twin type
limitations
−
≦ 50m
L＋L1＋L2＋L3
L L＋L1＋L2
−
≦ 100m
L＋L1＋L2＋L3
−
≦ 50m
L
−
L
−
≦ 100m
L
≦ 5m − − −
−
L1, L2
≦ 30m
−
− L1, L2, L3
≦ 27m − − −
≦ 10m ｜L1−L2｜ −
｜L1−L2｜,｜L2−L3｜,｜L3−L1｜
≦ 3m −
−
≦ 10m
−
≦ 10m
− − −
≦ 30m
H H H
≦ 15m
≦ 0.5m −
h h1, h2, h3

5) Installation space

●

Walls surrounding the unit in the four sides are not acceptable.

●

There must be a 1-meter or larger space in the above.

●

Where a danger of short-circuiting exists, install guide louvers.

● When more than one unit are installed, provide sufficient intake space consciously so that short-circuiting may not occur.
●

Where piling snow can bury the outdoor unit, provide proper snow guards.

● A barrier wall placed in front of the exhaust diffuser must not be higher than the unit.
（mm）
Example installation Ⅱ Ⅲ
Ⅰ
Size
Open Open 500
L1
L2 300 5 Open
150 300 150
L3
L4 5 5 5
6) Installation
① Anchor bolt fixed position ② Notabilia for installation
Intake
Outlet
190 580 200
Use a long block to extend the width.
●
In installing the unit, fix the unit's legs with bolts specified on the left.
●

The protrusion of an anchor bolt on the front side must be kept within 15 mm.

●

Securely install the unit so that it does not fall over during earthquakes or strong winds, etc.

● Refer to the left illustrations for information regarding concrete foundations.
●
Install the unit in a level area. (With a gradient of 5 mm or less.)
Improper installation can result in a compressor failure, broken piping within the unit and abnormal noise generation.
7) To run the unit for a cooling operation, when the outdoor temperature
is –5°C or lower.
● When the outdoor air temperature is -5°C or lower, provide a snow hood to the outdoor unit on site.
So that strong wind will not blow against the outdoor heat exchanger directly. Regarding outline of a snow hood,
refer to our technical manual.
< Single type >
≧ 3m
H
Triple type B
−
L＋La＋L1＋L2＋L3
−
Outdoor unit
L＋La＋L1＋L2＋L3
−
L
−
L < Twin type >
Indoor unit
(The unit of which elevation difference from the outdoor unit is the largest.)
La
−
L1 (1)
La＋L2, La＋L3
(1)
H
−
L1−(La＋L2), L1−(La＋L3) (1)
｜L2−L3｜
Outdoor unit
H
h1, h2, h3
< Triple type A >
Indoor unit
L
Intake 3
L
2
L
4
Intake
( service
Outlet )
space L
1
Fasten with bolts
(M10-12)
Use a thicker block to anchor deeper.
Indoor unit
L
Indoor unit h
L1
L2
L (riser)