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1,MFL67221438,영영 2018. 10. 4. 영영 11:29 Page 5
INSTALLATION PROCESS
Determination of division work
Preparation of contract drawings
Sleeve and insert work
Installation of indoor unit
Refrigerant piping work
Drain pipe work
Duct work
Heat insulation work
Electrical work
(connection circuits and drive circuits)
Airtight test
Vacuum drying
Additional charge of refrigerant
Fit facing panels
Automatic addressing of indoor unit
Test run adjustment
Transfer to customer with explanation
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 re-
frigerant 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.)
Indicate clearly who will be responsible for switch setting.
Make connection clearly between outdoor, indoor,
remote controller and option.
Take account of gradient
Outdoor unit foundation work
of drain piping
The foundation must be level even
Check model name to
make sure the fitting
Installation of outdoor unit
is made correctly
Avoid short circuits and ensure
sufficient space is allowed for service
Special attention to dryness,
cleanness and tightness
Adjust to downward gradient
Make sure airflow is sufficient
Make sure no gaps are left where
the insulating materials are joined
Multiple core cable must not be used.
(suitable cable should be selected)
2
In the final check for 24hours at 3.8MPa (38.7 kgf/cm
)[551.1psi]
there must be no drop in pressure.
The vacuum pump used must have a capacity of reaching at least
5 torr, more than 1 hour
Recharge correctly as calculated in this manual. and record the
amount of added refrigerant
Make sure there are no gaps left between the facing materials
used on the ceiling
Refer to automatic addressing flowchart
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
has been fitted correctly
Explain the use of the system as clearly as possible to your customer and
make sure all relevant documentation is in order
OUTDOOR UNITS INFORMATION
CAUTION
!
Combination Ratio(50~200%)
Outdoor Number
Single outdoor units
Double outdoor units
Triple outdoor units
Over the triple unit
Notes : * We can guarantee the operation only within 130%
combination. If you want to connect more than 130%
combination, please contact us and discuss the re-
quirement like below.
• If the operation of indoor unit is more than 130%, the airflow
will be operated as low in the all indoor units.
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 also be 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.
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 re-
frigerant 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 be-
cause it is expensive in comparison with R22.
5
Connection Ratio
200%
160%
130%
130%
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