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Table 1-6 Tubing Data for Models (Single, Twin, Triple, Double-Twin)
Tubing Data
Liquid tube
Tubing size
outer diameter
Gas tube
Limit of tubing length
GB
Outdoor unit is
Limit of elevation
placed higher
difference
between
Outdoor unit is
the 2 units
placed lower
Max. allowable tubing length
FR
at shipment
Required additional refrigerant
Refrigerant charged
at shipment
DE
No additional charge of compressor oil is necessary.
* If total tubing length becomes 30 to 50 m, charge additional refrigerant by 40 g/m.
Table 1-7 Connection Tube Sizes
IT
Type capacity of indoor unit
Gas tube
Liquid tube
PT
Amount of additional charge per 1 m
Charge with the amount of additional refrigerant calculated using the formula below, based on the values in Table
1-7 and the size and length of the liquid tubing.
Amount of additional refrigerant charge (g)
GR
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)
ES
(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 1-7.
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 sizes.
ø9.52 → L
: 35 m
ø9.52 → L1 + L2
: (10 + 5) m
ø6.35 →
4 : (5 + 5 + 5 + 10) m × 20 g / m = 500
1 –
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
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Models
SPW-C366VEH
mm (in.)
9.52 (3/8)
mm (in.)
15.88 (5/8)
(m)
70
30
(m)
15
(m)
3 – 30
(m)
(g/m)
*
40
3.6
(kg)
Double-Twin distribution tube (L1, L2)
Main tubing (L)
Total type capacity of indoor unit connected after
the branch
25 – 60
ø15.88
ø9.52
40 g
– Outdoor unit charge-less refrigerant amount (g)
= 40X (a) + 40X (b) + 20X (c) – 1200 (36 – 60 type)
Refrigerant charge per 1 m of actual length = 40 g/m (36 – 60 type)
Refrigerant charge per 1 m of actual length = 40 g/m
Refrigerant charge per 1 m of actual length = 20 g/m
Outdoor unit
× 40 g / m = 1400
× 40 g / m = 600
–1200
Total +1300
SPW-C486VEH
9.52 (3/8)
15.88 (5/8)
70
30
15
5 – 30
*
40
3.6
25
ø15.88
ø9.52
40 g
L
L1
1
2
12
SPW-C606VEH
9.52 (3/8)
15.88 (5/8)
70
30
15
5 – 30
*
40
3.6
Indoor unit connection tube
( 1, 2, 3, 4)
25 – 60
12 – 18
ø12.7
ø15.88
ø9.52
ø6.35
40 g
20 g
L2
3
4
Indoor unit (12 type × 4)
2007/07/25 13:21:35
2007/07/25 13:21:35
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