12-3.Refrigerant Charging Calculation - Mitsubishi Electric CITY MULTI PUHY-M200-300YNW-A1 Data Book

12. PIPING DESIGN
12-3. Refrigerant charging calculation
At the time of shipping, the outdoor unit is charged with the refrigerant. As this charge does not include the amount needed for extended
piping, additional charging for each refrigerant line will be required on site. In order that future servicing may be properly provided, always keep
a record of the size and length of each refrigerant line and the amount of additional charge by writing it in the space provided on the outdoor unit.
(1) Calculation of additional refrigerant charge
The amount of refrigerant to be added depends on the size and the total length of the liquid piping.
Calculate the amount of refrigerant to be charged according to the formula below.
Round up the calculation result to the nearest 0.1 kg (0.1 oz).
<Additional Charge>
Units "m" and "kg"
<Formula>
When the piping length from the outdoor unit to the farthest indoor unit is 30.5 m (100 ft) or shorter
Amount of
ø9.52 total length
additional
=
× 0.06 (kg/m)
charge (kg)
Outdoor unit
model
+ (E)M200
(E)M250
(E)M300
* Amount of refrigerant to be
charged for single-module units
* Certain types of indoor units will require additional refrigerant charge. See the separate document titled "ADDITIONAL
REFRIGERANT," which is available for download at http://www.mitsubishielectric.com/ldg/ibim/.
When the piping length from the outdoor unit to the farthest indoor unit is longer than 30.5 m (100 ft)
Amount of
ø9.52 total length
additional
=
× 0.050 (kg/m)
charge (kg)
Outdoor unit
model
+ (E)M200
(E)M250
(E)M300
* Amount of refrigerant to be
charged for single-module units
* Certain types of indoor units will require additional refrigerant charge. See the separate document titled "ADDITIONAL
REFRIGERANT," which is available for download at http://www.mitsubishielectric.com/ldg/ibim/.
MEES19K116
ø6.35 total length
+
× 0.024 (kg/m)
Total capacity of connected
Amount (kg)
indoor units
0 80 or below
+
0 81 to 160
0 161 to 330
331 to 390
ø6.35 total length
+
× 0.019 (kg/m)
Total capacity of connected
Amount (kg)
indoor units
0 80 or below
+
0 81 to 160
0 161 to 330
331 to 390
Amount (kg)
2.0
2.5
3.0
3.5
Amount (kg)
2.0
2.5
3.0
3.5
Y-Series
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