Mitsubishi Electric Mr.SLIM PUZ-ZM YKA2 Serie Manuel D'installation page 15

4. Installing the refrigerant piping
When length exceeds 70 m
When the total length of the piping exceeds 70 m, calculate the amount of additional charge based on the following requirements.
Note: If the calculation produces a negative number (i.e. a "minus" charge), of if calculation results in an amount that is less than the "Additional charge amount for 70 m",
perform the additional charge using the amount shown in "Additional charge amount for 70 m".
Main piping:
Amount of additional Liquid line size
charge ø12.7 overall length
=
× 0.06
(kg) (m) × 0.06 (kg/m)
Maximum additional
ZM200
charge
Additional charge amount
ZM200
for 70 meters
Fig. 4-9
Refilling refrigerant charge (kg) for less than 30 m (Chargeless pipe length)
Outdoor unit 5 m and less
ZM200 5.6
ZM250 6.0
M200 4.9
M250 6.0
Maximum pipe length (ZM200·250)
Liquid pipe O.D.
(mm)
Thickness
Gas pipe O.D. ø19.05
(mm)
Thickness t1.0
ZM200
20m
[20m]
ZM250
20m
[20m]
Note : Be sure to use hard (tempered) one for pipe over ø19.05.
<Marks in the table above>
: It can be used.
: Cooling capacity is lowered.
: Additional refrigerant charge is required when the
pipe length exceeds 20m.
The maximum pipe length
100m
Charge-less pipe length
[30m]
ZM200, 250
Additional refrigerant amount when the liquid pipe of the larger diameter is used.
1:1 system
Liquid pipe When the pipe length exceeds 20 m
ø15.88 Additional refrigerant amount
* w (g) 0 : Additional charge is not necessary.
Simultaneous twin/triple/quadruple system
When the pipe length (main piping and branch piping) exceeds 20 m
Additional refrigerant amount
L1 : ø15.88 liquid pipe length (m)
L3 : ø9.52 liquid pipe length (m)
* w (g) 0 : Additional charge is not necessary.
Main piping:
Liquid line size
ø9.52 overall length ×
+
0.04 (Gas line: ø25.4)
(m) × 0.04 (kg/m)
2.9 kg
1.6 kg
1 Indoor unit
2 Outdoor unit
3 Main piping
4 Branch piping
5 Multi distribution pipe (option)
6 - 10 m
5.7
6.2
5.1
6.2
ø9.52
t0.8
ø22.2 ø25.4 ø28.58
t1.0 t1.0 t1.0
Standard size
50m 100m 100m
[30m] [30m] [30m]
50m 100m 100m
[30m] [30m] [30m]
w (g) = 180 × Pipe length (m) - 3000
w (g) = (180 × L1) + (120 × L2) + (90 × L3) + (30 × L4) - 3000
L2 : ø12.7 liquid pipe length (m)
L4 : ø6.35 liquid pipe length (m)
Branch piping:
Liquid line size
ø9.52 overall length ×
+ +
0.03 (Gas line: ø15.88)
(m) × 0.03 (kg/m)
Outdoor unit : ZM250
Indoor unit 1 : ZM71
Indoor unit 2 : ZM71
Indoor unit 3 : ZM71
Main piping ø12.7 is A = 65 m
Branch piping ø9.52 is B + C + D = 15 m
Therefore, the amount of additional charge is: 65 × 0.06 + 15 × 0.04
- 1.8 = 2.7(kg)
(Fractions are rounded up)
11 - 15 m 16 - 20 m
5.9 6.0
6.3 6.5
5.2 5.4
6.3 6.5
ø12.7
t0.8
ø19.05 ø22.2 ø25.4
t1.0 t1.0 t1.0
20m 50m 100m
[20m] [30m] [30m]
Standard size
20m 50m 100m
[20m] [30m] [30m]
Branch piping:
Liquid line size
ø6.35 overall length
-
ZM200
× 0.01
(m) × 0.01 (kg/m)
A: ø12.7 .....65 m
B: ø9.52 .....5 m
C: ø9.52 .....5 m
D: ø9.52 .....5 m
21 - 25 m
6.2
6.7
5.5
6.7
ø15.88
t1.0
ø28.58 ø22.2 ø25.4 ø28.58
t1.0 t1.0 t1.0
100m 50m 50m
[30m] [20m] [20m]
100m 50m 50m
[30m] [20m] [20m]
1.2 (kg)
en
26 - 30 m
6.3
6.8
5.6
6.8
ø31.75
t1.0 t1.1
50m 50m
[20m] [20m]
50m 50m
[20m] [20m]
13