70
8-2. PUHZ-RP200·250YKA
8-2-1. 1:1 SYSTEM
(1) Pipe length
(2) Adjusting the amount of refrigerant
Check additional refrigerant charging amount referring to table 7 when the liquid pipe diameter is 1 size larger
than the standard size, and table 2 when the pipe of the standard diameter is used.
<Table 2>
<Table 1> Maximum pipe length (RP200·RP250)
Amount of additional refrigerant charge (kg)
30 m and less
31-40 m and less 41-50 m and less 51-60 m and less 61-70 m and less 71-120 m and less
0.9 kg
1.8 kg
2.7 kg
3.6 kg
1.2 kg
2.4 kg
3.6 kg
4.8 kg
Outdoor unit
permitted
pipe length
RP200
RP250
120m or less
Initial charge
(kg)
7.1
7.7
No additional
charge necessary
The additional charge
amount is obtained by
the following formula.
•If the wiring connecting the indoor and outdoor units is longer than 80m, use separate indoor /outdoor unit
power supplies.
Note : Be sure to use hard (tempered) one for pipe over
:
22.2(RP200)/
:
19.05(RP250).
120m
[30m]
<Marks in the table above>
The maximum pipe length
Charge-less pipe length
: It can be used.
: Cooling capacity is lowered.
: Additional refrigerant charge is required when
the pipe length exceeds 20m.
Liquid
pipe
(mm)
Gas
pipe
(mm)
O.D.
Thick-
ness
O.D.
Thick-
ness
RP200
RP250
:
9.52
t0.8
:
12.7
t0.8
:
15.88
t1.0
:
19.05
t1.0
20m
[20m]
20m
[20m]
:
22.2
t1.0
50m
[30m]
50m
[30m]
:
25.4
t1.0
Standard size
120m
[30m]
120m
[30m]
:
28.58
t1.0
120m
[30m]
120m
[30m]
:
19.05
t1.0
20m
[20m]
20m
[20m]
:
22.2
t1.0
50m
[30m]
50m
[30m]
:
25.4
t1.0
120m
[30m]
Standard size
120m
[30m]
:
22.2
t1.0
50m
[20m]
50m
[20m]
:
25.4
t1.0
50m
[20m]
50m
[20m]
:
28.58
t1.0
50m
[20m]
50m
[20m]
:
28.58
t1.0
120m
[30m]
120m
[30m]
:
31.75
t1.1
50m
[20m]
50m
[20m]
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 charage amount for 70 m”,
perform the additional charge using the amount shown in “Additional charge amount for 70 m”.
Amount of additional
charge
=
Main piping:
Liquid line size
ø12.7 overall length ×
0.11
+
+
+
–
3.6 (kg)
(kg)
(m) × 0.11 (kg/m)
Additional charge amount
for 70 meters
RP200
3.6 kg
RP250
4.8 kg
Main piping:
Liquid line size
ø9.52 overall length ×
0.09 (Gas line: ø25.4)
(m) × 0.09 (kg/m)
Branch piping:
Liquid line size
ø9.52 overall length ×
0.06 (Gas line: ø15.88)
(m) × 0.06 (kg/m)
(m) × 0.02 (kg/m)
Branch piping:
Liquid line size
ø6.35 overall length ×
0.02
