(3) Increasing the size of the refrigerant tubing
Increasing the tubing size of the suction and discharge tubes can reduce the loss of capacity caused by longer
tubing lengths. (Only the main suction and discharge tubes with the largest tube diameter (main tube LA and
main tubes after the distribution point that are the same size as LA) can be changed.)
In this case, it is necessary to recalculate the actual indoor unit capacities. Refer to the table below to increase
the tubing size. However, total tubing length must not exceed the maximum allowable tubing length.
2-2. Example of Tubing Size Selection for Extension and Additional Charge Amount
Standard tube diameter
ø31.75
ø38.1
ø38.1
ø41.28
0.6
0.7
• Correction coefficient for equivalent length when the size of the largest main
wide tube is increased
• Sample calculation for the system below
* The connection between the indoor unit(s) and the solenoid valve kit(s) has three (3) types of methods.
For further details, refer to the Section 2. 3-4. "Connecting Multiple Indoor Units to a Single Solenoid Valve Kit".
*
(suction and discharge tubes, mm)
Tube diameter after change
(suction and discharge tubes, mm)
Equivalent length
correction coefficient
Tubing equivalent length after size increase
= Standard tubing equivalent length × Equivalent length correction coefficient
Extension indoor units
Extension
outdoor units
Type 90
Type 115
Lc
Lb
La
LP
LA
LN
L1
L7
L2
L3
L4
L5
L6
L11
L10
L9
L8
L13
L12
LK
L14
L15
LJ
LI
LM
LH
LL
LG
LB
LC
LD
LE1
LE2
LF
Type 140
Type 36
Type 36
Type 36
Type 36
Type 36
Type 12
Type 25
Type 25
Type 18
Type 25
Type 36
Type 25
Type 18
Type 9
Type 9
Elevation difference
H=4m
Elevation difference
H=5m
Elevation difference
H=5m
Solenoid Valve Kit
Outdoor units
10HP: SPW-CR904GDZH8B
10HP: SPW-CR904GDZH8B
8HP: SPW-CR704GDZH8B
2-20
Design of 3-WAY ECO-i SYSTEM
1
2
3
4
5
6
7
8
2. System Design
TD831143-00̲W-3WAY.indb 20
TD831143-00̲W-3WAY.indb 20
2008/12/01 16:15:44
2008/12/01 16:15:44
Содержание SPW-C0705DZH8
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Страница 554: ...6 10 Electrical Data 1 2 3 4 5 6 7 8 2 Indoor Unit Schematic Diagram SPW SR74 94 124 164 184 254GXH56 A B ...
Страница 555: ...6 11 Electrical Data 1 2 3 4 5 6 7 8 2 Indoor Unit 3 Electric Wiring Diagram SPW ADR74 94 124GXH56 A B ...
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