Air Conditioner Service Manual
10. Introduction R32/R290 air conditioner installation
1) Introduction to Refrigerants R32 & R290
The refrigerants used for air conditioners are environmentally friendly hydrocarbons R32 and R290.
The two kinds of refrigerants are combustible and odorless. Moreover, they can burn and explode
under certain condition. However, there will be no risk of burning and explosion if you comply with the
following table to install your air conditioner in a room with an appropriate area and use it correctly.
Compared with ordinary refrigerants, Refrigerants R32 & R290 are environmentally friendly and do
not destroy the ozone sphere and that their values of greenhouse effect are also very low.
R32/R290 air conditioner installation area requirement
Refrigerants type
Capacity
Requirement room area
R32
9000btu
˚
4m
2
R32
12000btu
˚
4m
2
R32
18000btu
˚
15m
2
R32
24000btu
˚
25m
2
R290
9000btu
˚
10m
2
R290
12000btu
˚
13m
2
R290
18000btu
˚
15m
2
R290
24000btu
˚
30m
2
Caution:
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Please contact the nearest after-sale service center when maintenance is necessary. At the time
of maintenance, the maintenance personnel must strictly comply with the Operation Manual
provided by the corresponding manufacturer and any non-professional is prohibited to maintain
the air conditioner.
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It is necessary to comply with the provisions of gas-related national laws and regulations.
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It is necessary to clear away the refrigerant in the system when maintaining or scrapping an air
conditioner.
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When filling the combustible refrigerant, any of your rude operations may cause serious injury or
injuries to human body or bodies and object or objects.
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A leak test must be done after the installation is completed.
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It is a must to do the safety inspection before maintaining or repairing an air conditioner using
combustible refrigerant in order to ensure that the fire risk is reduced to minimum.
2) Installation Safety
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The installation should be in a well-ventilated condition location.
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When you installing or maintaining an air conditioner using Refrigerant R32/R290, the location
should be free fire from open or any other goods temperature higher than 370
ഒ
for R290/548
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for R32 which easily produces open fire include welding, smoking, drying oven.
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When installing an air conditioner of R32/R290, it is necessary to take appropriate anti-static
measures such as wear anti-static clothing and gloves.
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It is necessary to choose the location for installation or maintenance where in the air inlets and
outlets of the indoor and outdoor units should be not surrounded by obstacles or close to any heat
source or combustible and/or explosive environment.
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If the indoor unit suffers refrigerant leak during the installation, it is necessary to immediately turn
off the valve of the outdoor unit and all the personnel should go out till the refrigerant leaks
completely for 15 minutes. If the product is damaged, it is a must to carry such damaged product
back to the maintenance station and it is prohibited to weld the refrigerant pipe or conduct other
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