Mitsubishi Electric PU(H)Y-P250YGM-A, Руководство по обслуживанию

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[
VIII
Test Run Mode ]
3. Amount of refrigerant to be added
The amount of refrigerant that is shown in the table below is factory-charged to the outdoor units.
The amount necessary for extended pipe (field piping) is not included and must be added on site.
(1) Calculation formula
The amount of refrigerant to be added depends on the size and the length of field piping. (unit in m)
* For P500 model, the value will be 2.0kg x 2 when two refrigerant circuits are connected.
* Round up the calculation result to the nearest 0.01kg. (Example: 18.54kg to 18.6kg)
(2) Sample: Outdoor PUHY-P500YGM-A, Indoor PFD-P500VM-E
(3) Sample: Outdoor PU(H)Y-P250YGM-A x 2, Indoor PFD-P500VM-E
Outdoor unit model P250 P500
Amount of pre-charged refrigerant in the
outdoor unit (kg) 9.5 22.0
Amount of added refrigerant (kg) = A x L +
The value of "A" is
L
1
:0.2 when the length of liquid pipe is :ø15.88
L
2
:0.12 when the length of liquid pipe is :ø12.7
L
3
:0.06 when the length of liquid pipe is :ø9.52
L
4
:0.024 when the length of liquid pipe is :ø6.35
L : Length of liquid pipe
: For indoor units Refer to the table below.
Total capacity of connected in-
door units
For indoor units (kg)
P250 model 2.0
P500 model * 4.0
Indoor
When the liquid pipe size is 15.88, and the pipe length is 150m,
Outdoor
150m
15.88
According to the above formula
The final result will be as follows:
Amount of refrigerant to be charged (kg) = 0.2 x 150 + 4.0 = 34.0kg
Amount of refrigerant to be charged = 34.0kg
80m
9.52
80m
9.52
Indoor
When the liquid pipe size is 9.52, and the pipe length is 80m,
Outdoor
Outdoor
According to the above formula
The final result will be as follows:
Amount of refrigerant to be charged (kg) = 0.06 x 80 + 2.0 = 6.8kg
Amount of refrigerant to be charged = 6.8kg (for one refrigerant circuit)
CAUTION
Charge liquid refrigerant (as opposed to gaseous refrigerant) into the system.
ΠIf gaseous refrigerant is charged into the system, the composition of the refrigerant in the cylinder will change and may
result in performance loss.