Daikin HUBBARD HCU2040PXB1 Installation, Commissioning And Maintenance Manual page 26

Materials in the System
Refrigerant R744
R-744 is odourless, heavier than air and is an asphyxiate. The refrigerant concentration
limit of R-744 is lower than HFCs because of its potential for high toxicity
The table below summarises the effect of CO2 at various concentrations in air.
PPM of R744
400
5,000
15,000
30,000
100,000
300,000
Please refer to the material safety datasheet provided for R744 for additional
information
Lubricant Oil
Oil type used in these Condensing units is Daphne PZ68S (Idemitsu PAG)
Please refer to the material safety datasheet provided for the above oils for additional
information
Copyright HPL March 2021
Concentration in atmosphere
Long-term exposure limit (8 hours)
Short-term exposure limit (10 min)
Discomfort, breathing difficulties, headache, dizziness, etc
Loss of consciousness, death
Effect
Quick death
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