6
Refrigerant Safety Precaution
Qualification requirement for installation and maintenance
Everyone who is working with a refrigeration system should bear the valid certification awarded
by the authorized organization and the qualification for dealing with the refrigeration system
recognized by this industry.
Installation reminders
• The air conditioner cannot be installed in a room that has running fire or such fire source.
• The air conditioner must be installed in a room that is larger than the minimum room area.
(See Table 1 below).
• Leak test is a must after installation.
Table 1: Minimum room area (m
2
)
Charge amount
(kg)
≤1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5
Floor location / 14.5 16.8 19.3 22.0 24.8 27.8 31.0 34.3 37.8 41.5 45.4 49.4 53.6
Window
mounted
/ 5.2 6.1 7.0 7.9 8.9 10.0 11.2 12.4 13.6 15.0 16.3 17.8 19.3
Wall mounted / 1.6 1.9 2.1 2.4 2.8 3.1 3.4 3.8 4.2 4.6 5.0 5.5 6.0
Ceiling
mounted
/ 1.1 1.3 1.4 1.6 1.8 2.1 2.3 2.6 2.8 3.1 3.4 3.7 4.0
Welding Instructions - Must be done by a qualified technician
If you should cut or weld the refrigerant system pipes during maintenance, please follow the
steps below:
1. Shut down the unit and cut power supply.
2. Eliminate the refrigerant.
3. Vacuum.
4. Clean it with N2 gas.
5. Cut or weld.
6. Carry back to the service spot for welding.
NOTE: The refrigerant should be recycled into a specialized storage tank.
WARNING: Make sure there isn’t any naked flame near the outlet of the vacuum pump
and that is well-ventilated.
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