Mitsubishi Electric CITY MULTI PUHY-P72-432TNU-A Data Book page 190

12. PIPING DESIGN
Example: PUHY-P144TNU/YNU
m [kg]
Indoor 1: P48
The total length of liquid pipe of each size is as follows:
12.7 : A = 40 = 40 m
9.52 : B + C + D + a + b + e = 10 + 8 + 10 + 10 + 5 + 10 = 53 m
6.35 : c + d = 10 + 10 = 20 m
A
Total capacity of connecting Indoor units Pt :
Pt = P48 + P36 + P15 + P12 + P24 = P135
m [kg]
Total length of liquid
Additional
refrigerant charge
=
(kg)
=
= 11.2 kg
or
ft. [oz]
Total length of liquid
Additional
refrigerant charge
=
(oz)
=
= 394 [oz]
Limitation of the amount of refrigerant to be charged
The above calculation result of the amount of refrigerant to be charged must become below the value in the table below.
Total index of the outdoor units
Factory charged
Charged on site
Total for system
Maximum refrigerant charge
Factory charged
Charged on site
Total for system
Total index of the outdoor units
Factory charged
Charged on site
Total for system
Maximum refrigerant charge
Factory charged
Charged on site
Total for system
MEES23K040
A: 40 m a:
2: P36 B: 10 m b:
3: P15 8 m c:
4: P12 10 m d:
5: P24 e:
B C
a b
P48 P36
Total length of liquid
+
x 0.26 (kg/m) x 0.18 (kg/m)
0 (m) x 0.26 (kg/m) 0 (m) x 0.18 (kg/m)
0 + 0
Total length of liquid
+
x 2.80 (oz/ft.) x 1.94 (oz/ft.)
0 (ft.) x 2.80 (oz/ft.) 0 (ft.) x 1.94 (oz/ft.)
0 + 0
P72 P96
T/YNU T/YNU
6.5kg 9.8kg
14.0kg 22.6kg
20.5kg 32.4kg
14 lbs 21 lbs
5 oz 10 oz
30 lbs 49 lbs
14 oz 13 oz
45 lbs 71 lbs
3 oz 7 oz
P312 P336
T/YSNU T/YSNU
26.1kg 29.4kg
44.1kg 45.6kg
70.2kg 75.0kg
57 lbs 64 lbs
9 oz 13 oz
97 lbs 100 lbs
4 oz 8 oz
154 lbs 165 lbs
12 oz 6 oz
ft. [oz]
10 m Indoor 1: P48 A:
5 m 2: P36 B:
10 m 3: P15 C:
10 m 4: P12 D:
10 m 5: P24
The total length of liquid pipe of each line is as follows:
A = 131 = 131ft.
+ a + b + e = 32 + 26 + 32 + 32 + 16 + 32 = 170ft.
Total capacity of connecting Indoor units Pt :
Pt = P48 + P36 + P15 + P12 + P24 = P135
D
c d
P15 P12
Total length of liquid Total length of liquid
+ +
x 0.11 (kg/m) x 0.054 (kg/m)
40 (m) x 0.11 (kg/m) 53 (m) x 0.054 (kg/m)
+ 40 x 0.11 +
Total length of liquid Total length of liquid
+ +
x 1.19 (oz/ft.) x 0.58 (oz/ft.)
131 (ft.) x 1.19 (oz/ft.) 170 (ft.) x 0.58 (oz/ft.)
+ 131 x 1.19 + 170 x 0.58
P120 P144 P168 P192
T/YNU T/YNU T/YNU T/YSNU
9.8kg 10.8kg 10.8kg 19.6kg
24.0kg 24.3kg 32.2kg 32.2kg
33.8kg 35.1kg 43.0kg 51.8kg
21 lbs 23 lbs 23 lbs 43 lbs
10 oz 13 oz 13 oz 3 oz
52 lbs 53 lbs 70 lbs 70 lbs
15 oz 9 oz 16 oz 16 oz
74 lbs 77 lbs 94 lbs 114 lbs
8 oz 6 oz 13 oz 3 oz
P360 P384 P408 P432
T/YSNU T/YSNU T/YSNU T/YSNU
29.4kg 30.4kg 31.4kg 32.4kg
45.6kg 47.3kg 47.2kg 47.1kg
75.0kg 77.7kg 78.6kg 79.5kg
64 lbs 67 lbs 69 lbs 71 lbs
13 oz 0 oz 4 oz 7 oz
100 lbs 104 lbs 104 lbs 103 lbs
8 oz 4 oz 1 oz 13 oz
165 lbs 171 lbs 173 lbs 175 lbs
6 oz 5 oz 5 oz 4 oz
131ft. 32ft.
32ft. b: 16ft.
26ft. c: 32ft.
32ft. d: 32ft.
e: 32ft.
e
P24
Total length of liquid
+
x 0.021 (kg/m)
20 (m) x 0.021 (kg/m)
53 x 0.054 + 20 x 0.021
Total length of liquid
+
x 0.23 (oz/ft.)
64 (ft.) x 0.23 (oz/ft.)
+ 64 x 0.23
P216 P240 P264
T/YSNU T/YSNU T/YSNU
19.6kg 26.1kg
19.6kg
34.0kg 34.9kg 44.1kg
53.6kg 54.5kg 70.2kg
43bs
43 lbs 57 lbs
3 oz 3 oz 9 oz
74 lbs 76 lbs 97 lbs
15 oz 15 oz 4 oz
118 lbs 120 lbs 154 lbs
3 oz 2 oz 12 oz
Y-Series
+ 0 + 3.5
+ 0 + 3.5
+ 0 + 124
+ 0 + 124
P288
T/YSNU
26.1kg
44.1kg
70.2kg
57 lbs
9 oz
97 lbs
4 oz
154 lbs
12 oz
187