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4
INSTALLATION PROCESS
ENGLISH
The foundation must be level even
Outside unit foundation work
Avoid short circuits and ensure
sufficient space is allowed for service
Installation of outside unit
Refer to automatic addressing flowchart
Automatic addressing of indoor unit
In the final check for 24hours at 3.8 MPa(38.7 kgf/cm
2
) there
must be no drop in pressure.
Airtight test
Multiple core cable must not be used.
(suitable cable should be selected)
Electrical work
(connection circuits and drive circuits)
Make sure no gaps are left where
the insulating materials are joined
Heat insulation work
Make sure airflow is sufficient
Duct work
Adjust to downward gradient
Drain pipe work
Special attention to dryness,
cleanness and tightness
Refrigerant piping work
Check model name to
make sure the fitting
is made correctly
Installation of indoor unit
Take account of gradient
of drain piping
Sleeve and insert work
Make connection clearly between outside, indoor,
remote controller and option.
Preparation of contract drawings
Indicate clearly who will be responsible for switch setting.
Determination of division work
The vacuum pump used must have a capacity of reaching at least
5 torr, more than 1 hour
Vacuum drying
Recharge correctly as calculated in this manual. and record the
amount of added refrigerant
Additional charge of refrigerant
Make sure there are no gaps left between the facing materials
used on the ceiling
Fit facing panels
Run each indoor unit in turn to make sure the pipe work
has been fitted correctly
Test run adjustment
Explain the use of the system as clearly as possible to your customer and
make sure all relevant documentation is in order
Transfer to customer with explanation
Preheat the crank case with the electrical heater for more than 6 hours.
CAUTION
• The above list indicates the order in which the individual work opera-
tions are normally carried out but this order may be varied where
local conditions warrants such change.
• The thickness of the piping should comply with the relevant local and
national regulations for the designed pressure 3.8Mpa(551.1psi).
• Since R410A is a mixed refrigerant, the required additional
refrigerant must be charged in its liquid state.(If the refrigerant is
charged in its gaseous state, its composition changes and the sys-
tem will not work properly.)
!
CAUTION
Notes: *
We can guarantee the operation only within 130% Combina-
tion. If you want to connect more than 130% combination,
please contact us and discuss the requirement like below.
• If the operation of indoor unit is more than 130%, low airflow
operation is recommended in all the indoor units.
• If the operation of indoor unit is more than 130%, additional re-
frigerant is needed according to the Aheadquarter guidance.
• Over 130%, capacity is same as capacity of 130%, Same re-
mark is valid for power input.
•
Ratio of the running Indoor Units to the Outside: Within 10 ~ 100%
•
A combination operation over 100% cause to reduce each indoor unit capacity.
Combination Ratio(50~200%)
Outside Unit Number Connection Ratio
Single outside unit s 200%
Double outside unit s 160%
More than Triple outside unit s
130%
!
OUTSIDE UNITS INFORMATION
ALTERNATIVE REFRIGERANT R410A
The refrigerant R410A has the property of higher operating pressure in
comparison with R22.
Therefore, all materials have the characteristics of higher resisting
pressure than R22 ones and this characteristic should be also consid-
ered during the installation.
R410A is an azeotrope of R32 and R125 mixed at 50:50, so the ozone
depletion potential (ODP) of R410A is 0.
These days the developed countries have approved it as the environ-
ment-friendly refrigerant and encouraged to use it widely to prevent
environment pollution.
CAUTION
• The wall thickness of the piping should comply with the relevant
local and national regulations for the designed pressure
3.8Mpa(551.1psi).
• Since R410A is a mixed refrigerant, the required additional
refrigerant must be charged in its liquid state.
If the refrigerant is charged in its gaseous state, its composition
changes and the system will not work properly.
• Do not place the refrigerant container under the direct rays of the
sun to prevent it from exploding.
• For high-pressure refrigerant, any unapproved pipe must not be
used.
• Do not heat pipes more than necessary to prevent them from
softening.
• Be careful not to install wrongly to minimize economic loss
because it is expensive in comparison with R22.
!
SELECT THE BEST LOCATION
Select space for installing outside unit , which will meet the following
conditions:
• With strength which bears weight of unit
• With space for air passage and service work
Don't install the unit at the space where generation, inflow, stagna-
tion, and leak of combustible gas is expected.
• Avoid unit installation in a place where acidic solution and spray (sul-
fur) are often used.
• Location with no leakage of combustible gas
• Recommend the outside unit to be installed within
0~40°C(32~104°F).
• Location with installation or service work space (Refer to required
space)
• Do not use the outside unit under any special environment where oil,
steam and sulfuric gas exist.
• Install in a separate machine room not exposed to external air
- Establish an anti-freeze plan for the water supply when the product
is stopped during the winter.
- Install the product so that the noise from the machine room is not
transferred outsides
• The floor of the machine room must be water proof.
• Drainage must be installed in the machine room to process the water
drainage.
• Install a floor slope to make the drainage smooth.
• Avoid installing the outside unit in the location with following condi-
tions.
• Location where corrosive gas such as acidic gas is generated.
(It may cause the refrigerant leakage by corrosion of the pipe.)
• Location where electromagnetic waves happen.
(It may cause the abnormal operation by control parts disorder.)
• Location to be able to leak the combustible gas
• Location with carbon fiber or combustible dust.
• Location with the combustible material like thinner or gasoline.
(It may cause a fire by leaking the gas near the product.)
CAUTION
• Do not install Multi V water outside. Always install indoor like
machine room.
• Inverter product may generate electric noise. Keep the body
from computer, stereo etc. at enough distance. Specially leave
space from indoor remote controller to shoes electric devices at
the above 3m in weak electric wave area. Insert the power
cable and other wire into separate conduit.
!
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