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Table 1-2 Tubing Data for Models (Single)
Tubing Data
Liquid tube mm (in.)
Tubing size outer
diameter
Gas tube mm (in.)
Limit of tubing length (m)
Limit of elevation
placed higher (m)
difference
between the 2
units
placed lower (m)
Max. allowable tubing length at shipment
(m)
Required additional refrigerant (g/m)
Refrigerant charged at shipment (kg)
No additional charge of compressor oil is necessary.
*1
If total tubing length becomes 30 to 50 m, charge additional refrigerant by 40 g/m.
*2
In case of single connection, limit of tubing length is 50 m.
In case of twin connection, limit of tubing length is 40 m.
Table 1-3 Connection Tube Sizes
Type capacity of indoor unit
Gas tube
Liquid tube
Amount of Additional change per 1 m
Change with the amount of additional refrigerant calculated using the formula below, based on the values in Table 1-3 and the
size and length of the liquid tubing
Amount of additional refrigerant charge (g) (Twin, Triple, Double-Twin)
Do not remove refrigerant from the system, even if the result of the calculation is negative.
Additional refrigerant amount (g) = Additional refrigerant for main tubing (g) + Additional refrigerant for distribution tubing (g)
*1
In case of twin connection, 25 type of outdoor unit is 400 g.
(Use with the current refrigerant charge.)
(a) Actual length (m) of main tubing (ø9.52)
(b) Total length of distribution tubing (ø9.52)
(c) Total length of distribution tubing (ø6.35)
Example
Sample tubing lengths
L = 35 m
1 = 5 m
L1 = 10 m
2 = 5 m
L2 = 5 m
3 = 5 m
4 = 10 m
Find the liquid tube size from Table 1-3.
L
: ø9.52
(48 type)
L1
: ø9.52
(Total type capacity of indoor unit 24)
L2
: ø9.52
(Total type capacity of indoor unit 24)
1 – 4 : ø6.35
The amount of additional on-site refrigerant charge is found
by subtracting the outdoor unit charge-less refrigerant
amount from the total charge amount for all tube size.
ø9.52
L
ø9.52
L1 + L2
ø6.35
1 – 4
Outdoor unit charge-less refrigerant amount
The amount of additional on-site refrigerant charge is 1,300 g.
NOTE
For type 18, the additional refrigerant charge for tubing length (d) of 30 to 40 m is the following:
Additional refrigerant amount (g) = 20X (d) – 600
SPW-C256VH
Models
SPW-C256VH8
9.52 (3/8)
15.88 (5/8)
*2
50
Outdoor unit is
30
Outdoor unit is
15
3 – 20
/ 3 – 30 (VH8)
*1
40
1.7 / 1.9 (VH8)
Main tubing (L)
25 - 60
ø 15.88
ø 9.52
40 g
– Outdoor unit charge-less refrigerant amount (g)
= 40X (a) + 40X (b) + 20X (c) – 1200
Refrigerant charge per 1 m of actual length = 40 g/m (25 - 60 type)
Refrigerant charge per 1 m of actual length = 40 g/m
Refrigerant charge per 1 m of actual length = 20 g/m
: 35 m
× 40 g / m = 1400
: (10 + 5) m
× 40 g / m =
: (5 + 5 + 5 + 10) m × 20 g / m =
Total
SPW-C366VH
SPW-C486VH
SPW-C366VH8
SPW-C486VH8
9.52 (3/8)
15.88 (5/8)
15.88 (5/8)
50
30
15
5 – 30
*1
40
2.6 / 2.8 (VH8)
Double-Twin distribution tube (L1, L2)
Total type capacity of indoor unit connected after
the branch
25
ø 15.88
ø 9.52
40 g
*1
(36, 48, 60 types)
Outdoor unit
1
600
500
–1200
+1300
1-322
SPW-C606VH8
9.52 (3/8)
9.52 (3/8)
15.88 (5/8)
50
50
30
30
15
15
5 – 30
5 – 30
*1
*1
40
40
2.75
2.75
Indoor unit connection tube
(ℓ1, ℓ2, ℓ3, ℓ4)
25 - 60
ø 15.88
ø 9.52
40 g
L
L2
L1
2
Indoor unit (12 type x 4)
12 - 18
ø 12.7
ø 6.35
20 g
4
3
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