Mitsubishi Electric City Multi CMB-P1016NU-G, Service Handbook

Page: 172 / 349

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[
VIII
Test Run Mode ]
(2) Example
(3) Sample calculation
A
B
b c d
a
Heat source unit
Main BC controller
Sub BC controller
Maximum of 3 units per port
Total capacity of P54 or below
(All units connected to the same port
must be in the same operating mode.)
(Model above P55
and below P96)
Indoor
Indoor Indoor
40 m [131 ft] or less
110 m [360 ft] or less
H'= 40 m [131 ft] or less (Heat source unit below indoor unit) H= 50 m [164 ft] or less (Heat source unit above indoor unit)
h
1
= 15 m [49 ft](10 [32ft]) or less
h
2
= 15 m [49 ft]
(10m [32 ft]) or less
Branch joint (For use with the Y series)
CMY-Y-102S-G
1
2 3
4
5
A
Note : "Total sum of downstream unit model numbers"
in the table is the sum of the model numbers of
the units after point A in the figure.
To downstream units
(Main pipe)
Indoor
Indoor
e
C
Indoor unit 1: 72 model
Heat source unit: 96 model
2: 24 model
3: 18 model
4: 24 model
5: 06 model
A: 19.05 [3/4"] 40 m [131 ft]
19.05 [3/4"] : A = 40 m [130 ft]
9.52 [3/8"] : B + C + a + b + d = 35 m [112 ft]
6.35 [1/4"] : c + e = 20 m[65 ft]
B: 9.52 [3/8"] 5 m [16 ft]
C: 9.52 [3/8"] 5 m [16 ft]
a: 9.52 [3/8"] 10 m [32 ft]
b: 9.52 [3/8"] 5 m [16 ft]
c: 6.35 [1/4"] 10 m [32 ft]
d: 9.52 [3/8"] 10 m [32 ft]
The aggregate length of each liquid pipe type.
When
e: 6.35 [1/4"] 10 m [32 ft]
According to the above formula
The calculation result would be 11.98kg, and it is rounded up to the nearest 0.1kg.
Amount of refrigerant to be charged (kg) = (0.16 X 40) + (0.06 X 35) + (0.024 X 20) + 2 + 1 = 11.98kg
Amount of refrigerant to be charged = 12.0kg
The final result will be as follows:
The final result will be as follows:
Amount of refrigerant to be charged (oz) = (1.72 X 130) + (0.65 X 112) + (0.26 X 65) + 71 + 36 = 420.3oz
Amount of refrigerant to be charged = 424oz or 421oz
The calculation result would be 420.3oz, and it is rounded up to the nearest 1 oz or 4 oz(0.1kg).