Mitsubishi Electric BDT CITY MULTI, Installation And Pre-Commissioning Booklet

Page: 53 / 68

53
ADDITIONAL REFRIGERANT CALCULATIONS (Y SERIES) example
4 - 45
S.D
. Y
MEE14K009
3. Piping Design
AN1 2nd
A
B C D
e
a b c d
Indoor 1: P125 40 m 10 m
2: P100 10 m 5 m
3: P40 15 m 10 m
4: P32 10 m 10 m
5: P63 10 m
The total length of liquid pipe of each size is as follows:
ø12.7: A + e = 40 + 10 = 50 m
A: ø12.7 a: ø9.52
b: ø9.52
c: ø6.35
d: ø9.52
e: ø12.7
B: ø9.52
C: ø9.52
D: ø9.52
ø9.52: B + C + D + a + b + d = 10 + 15 + 10 + 10 + 5 + 10 = 60 m
ø6.35: c = 10 = 10 m
Example: PUHY-P350YKB
P40 P100 P125 P32 P63
= + + + + + 3.5
+ + + + + 3.5
+ 0
+ 0
(kg) 0 (m) x 0.26 (kg/m)
Additional
refrigerant charge
=
0 0 50 x 0.11 60 x 0.054 10 x 0.021
= 12.5 (12.45) kg
Total length of liquid
x 0.26 (kg/m)
0 (m) x 0.18 (kg/m)
Total length of liquid
x 0.18 (kg/m)
50 (m) x 0.11 (kg/m)
Total length of liquid
x 0.11 (kg/m)
60 (m) x 0.054 (kg/m)
Total length of liquid
x 0.054 (kg/m)
10 (m) x 0.021 (kg/m)
Total length of liquid
x 0.021 (kg/m)
Maximum refrigerant charge
Amount of factory charged refrigerant
There is a limit to the amount of refrigerant that can be charged into a unit. Regardless of the amount yielded by the formula above, observe the maximum
refrigerant charge in the table below.
Total index of the
outdoor units
P200YKB
22.3kg
P250YKB
29.7kg
P300YKB
32.7kg
P350YKB
33.6kg
P400YSKB
45.0kg
P450YSKB
45.9kg
P500YSKB
47.0kg
P550YSKB
51.3kg
P600YSKB
53.9kg
P650YSKB
56.5kg
P750YSKB
68.9kg
Maximum *1
refrigerant charge
*1 Maximum refrigerant charge: the amount of factory-charged refrigerant and the amount of refrigerant to be added on site
P700YSKB
68.9kg
Total index of the
outdoor units
P800YSKB
71.4kg
P850YSKB
73.2kg
P900YSKB
75.7kg
P950YSKB
96.9kg
P1000YSKB
99.9kg
P1050YSKB
102.9kg
P1100YSKB
106.0kg
P1150YSKB
109.0kg
P1200YSKB
112.0kg
P1250YSKB
112.0kg
P1300YSKB
112.0kg
P1350YSKB
112.0kg
Maximum *1
refrigerant charge
8.0kg
6.5kg
11.5kg
11.8kg
P200
P250
P300
P350
P400
P450
Outdoor unit
model
Charged amount
0000003416.BOOK 45 ページ ２０１４年１１月１１日 火曜日 午前９時３４分