Mitsubishi Electric ECOV-X37VA Manuel D'installation page 13

1. Precautions for the handling of R744
1-1. Characteristics of R744
R744 is a natural refrigerant with the ozone depletion coefficient of zero and the global warming coefficient of 1.
The pressure of R744 at the normal temperature (25°C) is as high as 6.4 MPa, which is approximately five times that of
R404A (1.24 MPa), requiring more stringent safety precautions.
1-2. Notes for the handling of R744
Seek appropriate treatment if exposed to R744.
(1) If R744 was inhaled
Move to an area with fresh air. Keep warm, and seek medical attention immediately.
(2) Skin contact with R744
Do not rub the affected area. Warm the affected area with lukewarm water, wrap a piece of gauze around, and seek medical
attention immediately.
(3) If R744 gets in the eyes
Rinse the affected area with clean water, and seek medical attention immediately.
1-3. Precautions for working with R744
The pressure of the refrigerant system using R744 is high. When removing R744 for maintenance or other purposes from
the system, fix the refrigerant hose, wrap the tip of the hose with a cloth, and remove R744 gradually.
R744 is cold. Avoid skin contact with R744.
Wear leather gloves before touching the refrigerant hose or the valve.
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