WR2-144
PQRY-P-T(S)LMU, Y(S)LMU (April 2017 Ver2)
© 2017 Mitsubishi Electric US, Inc.
12. PIPING DESIGN
Amount of factory charged refrigerant
Sample calculation
Indoor
A :
ø28.58 [1-1/8"]
40m [131ft.]
1 : P18
a :
ø6.35 [1/4"]
5m [16ft.]
B :
ø9.52 [3/8"]
10m [32ft.]
2 : P96
b :
ø9.52 [3/8"]
3m [10ft.]
C :
3 : P06
c :
ø6.35 [1/4"]
2m [6ft.]
ø12.70 [1/2"]
10m [32ft.]
4 : P08
d :
ø6.35 [1/4"]
3m [10ft.]
D :
5 : P54
e :
ø9.52 [3/8"]
3m [10ft.]
ø9.52 [3/8"]
5m [16ft.]
6 : P72
f :
ø9.52 [3/8"]
10m [32ft.]
E :
ø9.52 [3/8"]
5m [16ft.]
F :
ø22.20 [7/8"]
2m [6ft.]
G :
ø22.20 [7/8"]
1m [4ft.]
Total length for each pipe size :
ø28.58
A = 40m [131ft.]
ø22.20
F+G = 2+1 = 3m [10ft.]
ø12.70
C = 10m [32ft.]
ø9.52
B+D+E+b+e+f = 36m [116ft.]
ø6.35
a+c+d =10m [32ft.]
Therefore, additional refrigerant charge
= 28.08kg
Heat source unit
Model
P240
P216
P144
Charged amount
6.0 kg
11.7 kg
5.0 kg
= 28.1kg
(kg)
Therefore, additional refrigerant charge
= 990.5oz
= 991oz
(oz)
or
P192
P168
P120
P96
P72
= 131×3.55+10×2.26+32×1.19+116×0.59+32×0.23+106+71+212
= 40×0.33+3×0.21+10×0.11+36×0.054+10×0.021+3.0+2.0+6.0
The above calculation result of the amount of refrigerant to be charged must become below the value in the table below.
Limitation of the amount of refrigerant to be charged
Total index of the heat source units
P72
P96
P120
P144
P168
P192
P216
P240
P168
T/YLMU T/YLMU T/YLMU T/YLMU T/YLMU T/YLMU T/YLMU T/YLMU
T/YSLMU
Maximum refrigerant charge
Factory charged
11 lbs
1 oz
11 lbs
1 oz
11 lbs
1 oz
13 lbs
4 oz
13 lbs
4 oz
13 lbs
4 oz
25 lbs
13 oz
25 lbs
13 oz
22 lbs
1 oz
Charged on site
61 lbs
12 oz
70 lbs
9 oz
72 lbs
13 oz
97 lbs
1 oz
99 lbs
4 oz
114 lbs
11 oz
125 lbs
11 oz
127 lbs
14 oz
99 lbs
4 oz
Total for system
72 lbs
13 oz
81 lbs
10 oz
83 lbs
13 oz
110 lbs
4 oz
112 lbs
7 oz
127 lbs
14 oz
151 lbs
8 oz
153 lbs
11 oz
121 lbs
5 oz
P144
T/YSLMU
22 lbs
1 oz
97 lbs
1 oz
119 lbs
1 oz
22 lbs
1 oz
123 lbs
8 oz
145 lbs
9 oz
22 lbs
1 oz
110 lbs
4 oz
132 lbs
5 oz
26 lbs
8 oz
163 lbs
3 oz
189 lbs
10 oz
22 lbs
1 oz
130 lbs
2 oz
152 lbs
2 oz
26 lbs
8 oz
167 lbs
9 oz
194 lbs
1 oz
26 lbs
8 oz
163 lbs
3 oz
189 lbs
10 oz
Factory charged
5.0kg
5.0kg
5.0kg
6.0kg
6.0kg
6.0kg
11.7kg
11.7kg
10.0kg
Charged on site
28.0kg
32.0kg
33.0kg
44.0kg
45.0kg
52.0kg
57.0kg
58.0kg
45.0kg
Total for system
33.0kg
37.0kg
38.0kg
50.0kg
51.0kg
58.0kg
68.7kg
69.7kg
55.0kg
10.0kg
44.0kg
54.0kg
Total index of the heat source units
Maximum refrigerant charge
Factory charged
Charged on site
Total for system
P216
T/YSLMU
P192
T/YSLMU
P288
T/YSLMU
P240
T/YSLMU
P336
T/YSLMU
P312
T/YSLMU
Factory charged
Charged on site
Total for system
10.0kg
56.0kg
66.0kg
10.0kg
50.0kg
60.0kg
12.0kg
74.0kg
86.0kg
10.0kg
59.0kg
69.0kg
12.0kg
76.0kg
88.0kg
12.0kg
74.0kg
86.0kg
