Midea MTB1T-96CWN1 Technical & Service Manual page 67

MCAC-UTSM-201707
in following picture.

Procedure of opening the valve: Open the square-head cover, use a spanner to
capture the square head and open it thoroughly. Then tighten the square-head cover.

Procedure of closing the valve: same as the procedure of opening the valve, but rotate
the spanner clockwise thoroughly.

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
Note
: Please check and record the replenished quantity of the air conditioner.
It is not necessary to replenish refrigerant unless the length of connective pipe over 5m.
Otherwise, calculate the refrigerant replenishment quantity by the following formula:
The refrigerant replenishment quantity (kg)
=(the length of pipe (m) – 5) × Quantity of refrigerant replenished for 1m pipe length (kg/m)

Refrigerant leak precautions.
This air conditioner uses refrigerant R410A. R410A 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

Calculate the total quantity of refrigerant to be replenished [A (kg)].
Quantity of refrigerant replenished for 1m
pipe length
Φ9.52mm
Φ12.7mm
3
.
Midea R410A T3 50Hz Top-discharge Series
0.060kg
0.115kg
66