Installation Process - LG Multi V ARUB Series Installation Manual

Installation Process

Determination of division work
Preparation of contract drawings
Sleeve and insert work
Installation of indoor unit and HR unit
Refrigerant piping work
Drain pipe work
Duct work
Heat insulation work
Electrical work
(connection circuits and drive circuits)
All tight test
Vacuum drying
Additional charge of refrigerant
Automatic addressing of indoor unit and valves
Fit facing panels
Test run adjustment
Transfer to customer with explanation
• 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 wall thickness of the piping should comply with the relevant local and national regulations for the designed pres-
sure 3.8MPa.
• Since R410A is a mixed refrigerant, the required additional refrigerant must be charged in its liquid state.(If the refriger-
ant is charged in its gaseous state, its composition changes and the system will not work properly.)
Indicate clearly who is to be responsible for switch settings
Make relationship between outdoor, indoor, remote controller, and option connections clear.
(Prepare control circuit diagram)
Take account of gradient
of drain piping
Check model name to make
sure the fitting is made correctly
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 shouldbe selected)
In the final check for 24hours at 3.80 MPa(38.7 kgf/cm
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
Refer to automatic addressing flowchart
Preheat the crank case with the electrical heater for more than 6 hours.
(In case of the outdoor temperature below 10°C)
Make sure there are no gaps left between the facing materials used on the ceiling
Run each indoor unit in turn to make sure the pipe work has been fitted correctly
Explain the proper use of the system as clearly as possible to your customer and make
sure all relevant documentations are in order.
The foundation must be level
Outdoor unit foundation work
Avoid short circuits and ensure
Installation of outdoor unit
sufficient space is allowed
for service
2 ) there must be no drop in pressure.
Installation Manual 11
Installation Process