Standard tube diameter
(suction and discharge tubes, mm)
ø12.7
ø15.88 ø19.05 ø22.22 ø25.4
ø28.58 ø31.75 ø38.1
ø41.28
ø38.1
ø12.7
ø15.88 ø19.05 ø22.22 ø25.4
ø28.58 ø31.75
0.4
0.5
0.6
*
*
If the maximum tubing length (L1) exceeds 90 m (equivalent length), increase the tubing size of the main liquid,
suction and discharge tubes (LM) by one rank.
However, the upper limit for the suction and discharge tube size is ø41.28.
Increasing the tubing size of the suction and discharge tubes can reduce the loss of capacity caused by longer
tubing lengths.
Refer to Table 1 to increase the tubing size. However, the maximum allowable tubing length must not be exceeded.
The size increase is applied to the LM suction and discharge tubes (main tube with the largest diameter) only, and is limited
to the cases shown in Table 1. In addition, the amount of additional refrigerant charge is determined from the liquid tube size
only.
Correction coefficient for equivalent length when the size of
the suction and discharge tube (LM) is increased
Table 1
Tube diameter after change
(suction and discharge tubes, mm)
Equivalent length correction
coefficient
When increasing the size of the suction and discharge tubing (LM), multiply by the correction
coefficient from Table 1 and calculate the equivalent length for section LM.
0.7
Tubing equivalent length after size increase
= Standard tubing equivalent length × Equivalent length correction coefficient
ø9.52
2-17
Design of 3-WAY ECO-i SYSTEM
1
2
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1. Model Selecting and Capacity Calculator
TD831143-00̲W-3WAY.indb 17
TD831143-00̲W-3WAY.indb 17
2008/12/01 16:15:43
2008/12/01 16:15:43
Содержание SPW-C0705DZH8
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