Calculation Of The Amount Of Additional Refrigerant - Mitsubishi Electric PUHY-M200YNW-A1 Service Handbook

[6-3 Evaluating and Adjusting Refrigerant Charge ]
6-3-5

Calculation of the Amount of Additional Refrigerant

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).
(1) Units "m" and "kg"
<Formula>
When the piping length from the outdoor unit to the farthest hydro unit is 10 m (32 ft) or shorter
Amount of ø19.05 total
additional = length
charge (kg) × 0.29 (kg/m)
Outdoor unit model
+
* Amount of refrigerant to be charged for
single-module units
When the piping length from the outdoor unit to the farthest hydro unit is longer than 10 m (32 ft)
Amount of ø19.05 total
additional = length
charge (kg) × 0.24 (kg/m)
Outdoor unit model
+
* Amount of refrigerant to be charged for
single-module units
6 -
chapter 6
ø15.88 total
+ length
× 0.2 (kg/m)
Amount (kg)
(E)M200 0
(E)M250 0
(E)M300 0
(E)M350 0
(E)M400 0
(E)M450 0
(E)M500 0
ø15.88 total
+ length
× 0.16 (kg/m)
Amount (kg)
(E)M200 0
(E)M250 0
(E)M300 0
(E)M350 0
(E)M400 0
(E)M450 0
(E)M500 0
ø12.7 total ø9.52 total
+ length + length
× 0.12 (kg/m) × 0.06 (kg/m)
Hydro unit model
WM250
+
WM350
WM500
ø12.7 total ø9.52 total
+ length + length
× 0.10 (kg/m) × 0.050 (kg/m)
Hydro unit model
WM250
+
WM350
WM500
ø6.35 total
+ length
× 0.024 (kg/m)
Amount (kg)
3.0
3.0
3.0
ø6.35 total
+ length
× 0.019 (kg/m)
Amount (kg)
3.0
3.0
3.0
BS_06_E