8
4. Installing the refrigerant piping
Maximum pipe length (RP170·RP200)
Note : Be sure to use hard (tempered) one for pipe over
:
22.2.
75m
[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
RP170
RP200
:
9.52
t0.8
:
12.7
t0.8
:
15.88
t1.0
:
22.2
t1.0
50m
[30m]
:
25.4
t1.0
Standard size
75m
[30m]
:
28.58
t1.0
75m
[30m]
:
22.2
t1.0
50m
[20m]
:
25.4
t1.0
50m
[20m]
:
22.2
t1.0
40m
[20m]
:
25.4
t1.0
40m
[20m]
:
28.58
t1.0
40m
[20m]
:
28.58
t1.0
50m
[20m]
:
31.75
t1.1
40m
[20m]
RP170, 200
Additional refrigerant amount when the liquid pipe of the larger diameter is used.
1:1 system
Liquid pipe When the pipe length exceeds 0 m
[
15.88
Additional refrigerant amount w (g) =180 × Pipe length (m) - 3000
* w (g) 0 : Additional charge is not necessary.
Simultaneous twin/triple system
When the pipe length (main piping and branch piping) exceeds 0 m
Additional refrigerant amount w (g) =(180 × L1)+(10 × L) +(90 × L3)+(30 × L4) - 3000
L1 :
[
15.88 liquid pipe length (m)
L :
[
1.7 liquid pipe length (m)
L3 :
[
9.5 liquid pipe length (m)
L4 :
[
6.35 liquid pipe length (m)
* w (g) 0 : Additional charge is not necessary.