Daikin EWYT021CZI-A1, Руководство по установке и обслуживанию

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D-EIMHP01505-22_00EN 10/59
1.5.1.3. Flammability Requirement (IEC 60335-2-40)
– Lowest Underground Floor
On the other hand, if the indoor unit is installed on the lowest underground floor, the maximum refrigerant quantity with
respect to the flammability value shall be evaluated through the following formula:
𝑨 → 𝑴
𝑨
= 𝐶𝐹 𝑥 𝐿𝐹𝐿 𝑥 𝐻 𝑥 𝐴 = 0,15𝑥𝐻𝑥𝐴
Where:
•
A = Flammability Requirements for lowest underground floor installation
•
M
A
= Refrigerant Max Quntity [kg] for lowest underground floor installation
•
CF = Concentratiom factor (for Not Lowest Undergroud Floor, CF = 0,5)
•
LFL = Lower Flammability Limit (for R32, LFL = 0,307) [kg/m
3
]
•
H = Room Height (but not more than 2,2 [m])
•
A = Room Area [m
2
]
If the actual charge of the unit Mr >M
B
a safety alarm (Sound+Light) and ventilation (Natural or Forced) shall be
employed in accordance with EN 60335-2-40.
Table 3
– Space requirements: Lowest Underground Floor
The formulas provided above are with reference to a fixed room height of 2,2m
Usage Example:
Room Height H = 3m; A = 20m
2
•
B: M
B
= 0,75 x 0,307 x 2,2 x A = 10,2 kg
•
A: M
A
= 0,5 x 0,307 x 2,2 x A = 6,8 kg
•
T: M
T
= 0,3 x 3 x S = 0,9 x A = 18 kg