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3) Selection of installation location for the outdoor unit
P
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
that the bottom is higher than
snow cover surface.
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
unit to face a wall of building, or
provide a fence or a windbreak screen.
Over 500 mm
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 of refrigerant piping
Main pipe length
One-way pipe length after the first branching point
One-way pipe length difference from the first branching point to the indoor unit
Elevation difference between
indoor and outdoor units
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 utilized,
CAUTION
different one-way pipe length restrictions should apply depending on its pipe size. For more information, please see " 6. UTILIZATION OF EXISTING PIPING."
2) Determination of pipe size
●
Determine refrigerant pipe size pursuant to the following guidelines based on the indoor unit specifications.
2. Provide a snow hood to the outdoor
3. Install the unit under eaves
unit on site.
or provide the roof on site.
Regarding outline of a snow hood,
refer to our technical manual.
2.Install the outlet air blow side of
3.The unit should be installed on
the unit in a position perpendicular
the stable and level foundation.
to the direction of wind.
If the foundation is not level,
tie down the unit with wires.
Wind direction
Wind direction
Dimensional
Descriptions
limitations
≦50m
≦50m
≦20m
≦10m
≦30m
When the outdoor unit is positioned higher,
≦15m
When the outdoor unit is positioned lower,
≦0.5m
Model 71V
Gas pipe
φ15.88
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.
●
When more than one unit are installed side by side, provide a 250mm or wider interval between them as a service space. In
order to facilitate servicing of controllers, please provide a sufficient space between units so that their top plates can be
removed easily.
●
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.
Example installation
Size
L1
L2
L3
L4
6) Installation
① Anchor bolt fixed position
60
15
Intake
Outlet
150
580
880
Anchor bolt position
●
In installing the unit, fix the unit's legs with bolts specified on the above.
●
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 above 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.
Marks appearting in the drawing
Single type
Twin type
L
L＋L1＋L2
−
L
−
L1， L2
−
L1−L2
H
H
−
h
About brazing
Brazing must be performed under a nitrogen gas flow.
Liquid pipe
Without nitrogen gas, a large quantity of foreign matters (oxidized film) are created,
φ9.52
causing a critical failure from capillary tube or expansion valve clogging.
(mm)
71V
L
Intake
3
L
Ⅱ
Ⅲ
2
Ⅰ
Open
Open
500
Intake
300
250
Open
Outlet
150
100
service
100
(
)
space
250
250
250
② Notabilia for installation
Fasten with bolts
(M10-12)
Use a thicker block to
Use a long block to
150
anchor deeper.
extend the width.
87.9
< Single type >
H
Outdoor unit
< Twin type >
Indoor unit (The unit of which elevation difference from the outdoor unit is the largest.)
H
L1
Outdoor unit
L (riser)
L
4
L
1
Indoor unit
L
Indoor unit
h
L2
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