Safety Precautions; Installation Location - Mitsubishi Electric QUHZ-W40VA Manuel D'installation

1. Safety precautions

1.2. Before installation (relocation)
Caution:
• Be fully careful when moving the units. The unit must be carried by at least
2 people, as it weighs 20 kg or more. Do not lift using the packaging bands.
Wear protective gloves to unpack and to move or install it, in order to avoid
your hands being injured by fins or the edge of other parts.
• Install the insulation completely and tightly over the water pipe to avoid
condensation. Incomplete insulation will result in condensation forming on
the pipe surface and drip on ceiling, floor, and other important items.
• Install the drainage pipe by following the installation manual to ensure
proper drainage. Cover the drainage pipe with thermal insulation to prevent
condensation. Defective plumbing work will result in leakage on ceiling,
floor, and other household items.
1.3. Before electric work
Caution:
• The outdoor unit is powered via the cylinder unit. It is necessary to install a
suitable isolating switch onto the power lines connected to terminal S1 and
S2 from the cylinder unit.
• For the power lines, use standard cables of sufficient capacity. Otherwise, it
may cause a short circuit, overheating, or fire hazard.
• When installing the power lines, do not apply tension to the cables. The
cables may be cut or overheated resulting in a fire hazard.

2. Installation location

2.1. Choosing the outdoor unit installation location
• Avoid locations where the unit is exposed to direct sunlight or other sources of
heat.
• Select a location where noise emitted by the unit does not disturb neighbours.
• Select a location where easy wiring and pipe access to the power source is available.
• Avoid locations where combustible gases may leak, be produced, flow, or accumulate.
• Note that condensate water may be produced by the unit during operation.
• Select a level location that can bear the weight and vibration of the unit.
• Avoid locations where the unit is exposed to oil, steam, or sulfuric gas.
• Make sure to hold the handles to transport the unit. Do not hold the base of the
unit, as there is a risk that hands or fingers may be pinched and injured.
2.2. Outline dimensions (Outdoor unit)(Fig. 2-1)
Drain socket mounting location
2-U notched hole
405
40 2-10x21 slotted hole
*Installation bolt pitch
Top View
809 70
21 303
Terminal
block cover
Piping cover
155 500
Installation bolt pitch
Front View
• The base of the outdoor unit must be periodically checked to ensure it is
• Do not wash the outdoor unit. You may possibly receive an electric shock.
• Make sure that water flow rate for the water pipe does not exceed the
• Ensure to implement measures to prevent the water-pipe system from
• Make sure to earth the unit. Do not connect the earth wire to gas or
2.3. Windy location installation
When installing the outdoor unit on a rooftop or other location where the unit
is exposed to strong wind, do not face the air outlet of the unit directly into the
prevailing wind direction.
Strong wind entering the air outlet may impede the normal airflow and it may result
in a malfunction.
• Installation is not possible when there are obstructions on three of the four sides.
• If the obstruction at the front (discharge side) enables ventilation (such as a wire
(mm)
<For general regions>
32
Drain socket
mounting location Fig. 2-2
Side View
Power
communication
20
line connection
location
Outdoor unit
piping port B
(G 1/2 B)
Outdoor unit
Fig. 2-3
piping port A
(G 1/2 B)
172
184
Fig. 2-1
Side View
Fig. 2-4
The required clearance (D1 and D2) varies depending on the obstruction height (H).
If wind guides are mounted, see the table below.
Note that the operating noise levels may increase for certain installation conditions.
*If discharge air is blown against a wall, the wall can become dirty.
*If the area is poorly ventilated and the discharged air becomes sucked in again,
not loose, cracked or damaged. If such defects are left untreated, the unit
may fall down and cause damage or injuries.
predetermined level. Erosion-corrosion will occur inside the pipe if the water
flow rate exceeds the predetermined level (i.e. 1.5 m/s for copper pipe).
Install a pipe with the correct diameter to the required flow rate.
freezing. Freezing may cause water leakage and water supply failure.
water pipes, lightning rods, or telephone earth wires. If the unit is not
properly earthed, there may be a risk of electric shock.
mesh), installation is possible for the conditions "When there is no obstruction at
the front (discharge side)". If the obstruction at the front does not enable ventilation
(such as the outer wall of a building), install for the conditions "When there is an
obstruction at the front (discharge side).
■
When there is no obstruction at the front (discharge side)
(Fig. 2-2)
view)
The area above the unit must be open (clearance of at least 1 m or more).
100 mm
or more
outdoor
outdoor
unit
unit
Front
150 mm
or more
■
When there is no obstruction at the back
(suction side) (Fig. 2-3)
(Top view)
The upward direction must be open (at least 1 m or more is available).
outdoor
unit
150 mm
or more
■
When there is an obstruction at the front
D2
outdoor
unit
Front
D1
Obstruction
Top view
Obstruction
height (H)
Without wind guides
1200 mm or less 200 mm or more/100 mm or more 185 mm or more/30 mm or more
More than 1200 mm 300 mm or more/100 mm or more 350 mm or more/30 mm or more
heating performance can be reduced by about 10%. Mounting of wind guides
(product sold separately) can improve heating performance in certain cases.
100 mm
100 mm
or more
or more
outdoor
unit
Front
Front
300 mm
or more
Front
200 mm
or more
(Fig. 2-4)
(discharge side)
outdoor
Obstruction
unit
Front
H
Side view
Required clearance (D1/D2)
With wind guides
en
(Top
2