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Refrigerant charge
The calculation of the additional charge should be taken in account for the length of extra pipe.
Multiple Piping Models(Additional Charge)
Total Piping
Length(m)
– 30
– 40
– 50
– 60
– 70
– 80
– 85
Distributor type Models
Model
Standard length(m)
40k
48k
54k
• Distributor type Models
Additional charge (g) = (( Total Main piping Length - Main Standard Length ) x 50g/m
❈ CF = Max. number of connectable indoor unit – Total number of connected indoor unit
Ex) Distributor type Model 1Ø, 40kBtu/h
A
A
C
B
Model
18k
X
-
-
-
-
-
-
Main Piping length
Additional refriger-
5
5
5
+ (A Room Branch Length – Standard Length ) x 20g/m
+ (B Room Branch Length – Standard Length ) x 20g/m
+ (C Room Branch Length – Standard Length ) x 20g/m +.. )
- CF(Correction Factor) x 100
a
b
c
7k
9k
9k
e
d
18k
9k
INSTALLATION OF INDOOR, OUTDOOR UNIT
26k
30k
X
X
X
X
X
X
X
X
-
X
-
-
(X : No addition , - : Not applied)
Standard length(m)
ant(g/m)
50
50
50
• Total main pipe(A+B+C) = 30m
• Each branch pipe
a = 10m
b = 8m
c = 5m
d = 3m
e = 10m
*Additional Charge
=((30-5) x 50 + (10-5) x 20 + (8-5) x 20
+ (5-5) x 20 + (3-5) x 20 + (10-5) x 20)
- (7-5) x 100 = 1 270g
36k
X
X
X
X
X
-
X
-
-
(Unit: m)
Branch piping length
Additional refriger-
ant(g/m)
5
20
5
20
5
20
11
(Unit: g)
48k
X
X
250
450
650
850
950
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