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INSTALLATION PROCESS
Indicate clearly who will be responsible for switch setting.
Determination of division work
Make connection clearly between outdoor, indoor,
Preparation of contract drawings
remote controller and option.
Take account of gradient
Sleeve and insert work
of drain piping
Check model name to
Installation of indoor unit
make sure the fitting
is made correctly
Special attention to dryness,
Refrigerant piping work
cleanness and tightness
Drain pipe work
Adjust to downward gradient
Make sure airflow is sufficient
Duct work
Make sure no gaps are left where
Heat insulation work
the insulating materials are joined
Electrical work
Multiple core cable must not be used.
(connection circuits and drive circuits)
(suitable cable should be selected)
In the final check for 24 hours at 3.8 MPa (38.7 kgf/cm
Airtight test
there must be no drop in pressure.
The vacuum pump used must have a capacity of reaching at least
Vacuum drying
5 torr, more than 1 hour
Recharge correctly as calculated in this manual. and record the
Additional charge of refrigerant
amount of added refrigerant
Make sure there are no gaps left between the facing materials
Fit facing panels
used on the ceiling
Refer to automatic addressing flowchart
Automatic addressing of indoor unit
Preheat the crank case with the electrical heater for more than 6 hours.
Run each indoor unit in turn to make sure the pipe work
Test run adjustment
has been fitted correctly
Explain the use of the system as clearly as possible to your customer and
Transfer to customer with explanation
make sure all relevant documentation is in order
CAUTION
!
• The above list indicates the order in which the individual work
operations 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 3.8 MPa
(551.1 psi).
• 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.)
OUTDOOR UNITS INFORMATION
Combination Ratio(50~200%)
Outdoor unit foundation work
The foundation must be level even
Installation of outdoor unit
Notes : * We can guarantee the operation only within 130 %
Avoid short circuits and ensure
sufficient space is allowed for service
• If the operation of indoor unit is more than 130%, the airflow
ALTERNATIVE REFRIGERANT R410A
2
)[551.1 psi]
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 also be
considered 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.
• The wall thickness of the piping should comply with the relevant
• Since R410A is a mixed refrigerant, the required additional
• Do not place the refrigerant container under the direct rays of
• For high-pressure refrigerant, any unapproved pipe must not be
• Do not heat pipes more than necessary to prevent them from
• Be careful not to install wrongly to minimize economic loss
CAUTION
!
Outdoor Number
Single outdoor units
Double outdoor units
Triple outdoor units
Over the triple unit
combination. If you want to connect more than 130 %
combination, please contact us and discuss the
requirement like below.
will be operated as low in the all indoor units.
CAUTION
!
local and national regulations for the designed pressure 3.8 MPa
[551.1 psi]
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.
the sun to prevent it from exploding.
used.
softening.
because it is expensive in comparison with R22.
5
Connection Ratio
200 %
160 %
130 %
130 %
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