8
4. Installing the refrigerant piping
ZRP200, 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
[
15.88
Additional refrigerant amount w (g) =180 × Pipe length (m) - 3000
*
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 w (g) =(180
×
L1)+(120
×
L2) +(90
×
L3)+(30
×
L4) - 3000
L1 :
[
15.88 liquid pipe length (m)
L2 :
[
12.7 liquid pipe length (m)
L3 :
[
9.52 liquid pipe length (m)
L4 :
[
6.35 liquid pipe length (m)
*
w (g) 0 : Additional charge is not necessary.
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 charage amount for 70 m”,
perform the additional charge using the amount shown in “Additional charge amount for 70 m”.
Fig. 4-9
1
Indoor unit
Outdoor unit : ZRP250 A: ø12.7 .... 65 m
2
Outdoor unit
Indoor unit 1 : ZRP71 B: ø9.52 .... 5 m
3
Main piping
Indoor unit 2 : ZRP71 C: ø9.52 .... 5 m
4
Branch piping
Indoor unit 3 : ZRP71 D: ø9.52 .... 5 m
5
Multi distribution pipe (option) 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 × 0.12 + 15 × 0.06 - 3.6 = 5.1(kg)
(Fractions are rounded up)
Amount of additional
charge
=
Main piping:
Liquid line size
ø12.7 overall length
× 0.11
+
Main piping:
Liquid line size
ø9.52 overall length ×
0.09 (Gas line: ø25.4)
+
Branch piping:
Liquid line size
ø9.52 overall length ×
0.06 (Gas line: ø15.88)
+
Branch piping:
Liquid line size
ø6.35 overall length
× 0.02
-
3.6 (kg)
(kg)
(m) × 0.11 (kg/m)
(m) × 0.09 (kg/m)
(m) × 0.06 (kg/m)
(m) × 0.02 (kg/m)
Additional charge amount
for 70 meters
ZRP200 3.6 kg
ZRP250 4.8 kg
Max. 1m
When length exceeds 70 m
Maximum pipe length (ZRP200·ZRP250)
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.
100m
[30m]
The maximum pipe length
Charge-less pipe length
Liquid pipe
(mm)
O.D.
ø9.52
ø12.7
ø15.88
Thickness
t0.8
t0.8
t1.0
Gas pipe
(mm)
O.D.
ø19.05
ø22.2
ø25.4
ø28.58
ø19.05
ø22.2
ø25.4
ø28.58
ø22.2
ø25.4
ø28.58
ø31.75
Thickness
t1.0
t1.0
t1.0
t1.0
t1.0
t1.0
t1.0
t1.0
t1.0
t1.0
t1.0
t1.1
ZRP200
20m
[20m]
50m
[30m]
Standard size
100m
[30m]
100m
[30m]
20m
[20m]
50m
[30m]
100m
[30m]
100m
[30m]
50m
[20m]
50m
[20m]
50m
[20m]
50m
[20m]
ZRP250
20m
[20m]
50m
[30m]
100m
[30m]
100m
[30m]
20m
[20m]
50m
[30m]
Standard size
100m
[30m]
100m
[30m]
50m
[20m]
50m
[20m]
50m
[20m]
50m
[20m]
Refilling refrigerant charge (kg) for less than 30 m (Chargeless pipe length)
Outdoor unit
5 m and less
6 - 10 m
11 - 15 m
16 - 20 m
21 - 25 m
26 - 30 m
ZRP100-140
4.5
4.6
4.7
4.8
4.9
5.0
ZRP200
6.4
6.5
6.7
6.8
7.0
7.1
ZRP250
6.7
6.9
7.1
7.3
7.5
7.7
P200
5.8
5.9
6.1
6.2
6.4
6.5
P250
6.7
6.9
7.1
7.3
7.5
7.7
BH79D409H05.indb 8
2016/03/30 15:41:59
