Midea TempMaker Series, Technical Manual

Page: 88 / 152

R410A 380~415V 3Ph 50Hz TempMaker Series Split AC MCAC-UTSM-2014-03
87

After vacuum, according to the diameter and length of the connective pipe of liquid side between
the indoor unit and outdoor unit, calculate the refrigerant replenishment quantity. The refrigerant
for replenishment is R410A.
Diameter of liquid-side pipe Quantity of refrigerant replenished for 1m pipe length
Φ9.52mm
0.06kg
Φ12.7mm
0.12kg
Φ16mm (MOV-150HN1-R)
0.18kg
Φ16mm (MOV-192HN1-R)
0.20kg
Note:
Please check and record the replenished quantity of the air conditioner.

Refrigerant leak precautions. This air conditioner uses refrigerant R22. R22 is safe refrigerant
which is harmless and non-flammable. The room for placing the air conditioner should have a
proper space. Even if refrigerant leakage occurs, the density threshold will not be crossed.
Additional measures may also be taken.

Density threshold: Density of the Freon gas that does not harm the human body. Density
threshold of R410A: 0.3kg/m
3
.

Calculate the total quantity of refrigerant to be replenished [A (kg)].
Total refrigerant quantity = refrigerant replenishment quantity upon sh additional
refrigerant replenishment corresponding to the pipe length.

Calculate out the indoor volume [B (m
3
)] (according to the minimum volume)

Calculate out the refrigerant density:
[A (kg)] / [B (m
3
)]
≤ Density threshold: 0.3kg/m 3

Measures against crossing of the refrigerant density threshold.