Installation Process; Outdoor Units Information; Alternative Refrigerant R410A; Select The Best Location - LG Multi V PRHR033 Installation Manual

4

INSTALLATION PROCESS

Indicate clearly who will be responsible for switch setting.
Determination of division work
Make connection clearly between outside, 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
Duct work Make sure airflow is sufficient
Make sure no gaps are left where
Heat insulation work
the insulating materials are joined
Multiple core cable must not be used.
Electrical work
(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
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

CAUTION
!
Combination Ratio(50~130 %)
Outdoor Number
Single outdoor units
Double outdoor units
Triple outdoor units
Notes : * We can guarantee the operation only within 130 %
combination.
Outdoor unit foundation work
The foundation must be level even
Installation of outdoor unit
Avoid short circuits and ensure
sufficient space is allowed for service
2 ) there
Connection Capacity
130 %

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
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.
CAUTION
!
• The wall 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.
• 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 outdoor 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,
stagnation, and leak of combustible gas is expected.
• Avoid unit installation in a place where acidic solution and spray
(sulfur) are often used.
• Location with no leakage of combustible gas
• Recommend the outdoor 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 outdoor 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 outdoor unit in the location with following
conditions.
- 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.)