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MULTI V Water IV
7. Capacity tables
Note
1. These figures illustrate the rate of change in capacity of a standard indoor unit system at maximum load under
standard conditions. (Moreover, under partial load conditions there is only a minor deviation from the rate of
change in capacity shown in the above figures.)
2. With this outside unit, evaporating pressure constant control when cooling, and condensing pressure constant
control when heating is carried out.
3. If heat insulation of piping is insufficient, heat loss will become larger and capacity will decrease
4. Method of calculating cooling / heating capacity : maximum cooling / heating capacity of outside units
= cooling / heating capacity of outside units obtained from capacity table X capacity correction factor due to
piping length to the farthest indoor unit
5. Equivalent piping length for Y branch and other pipes can be calculated with following table.
Ø6.35 Ø9.52 Ø12.7 Ø15.88 Ø19.05 Ø22.2 Ø25.4 Ø28.58
mm
(inch)
(1/4)
(3/8)
Elbow
0.16
0.18
m(inch)
(6.3)
(7.1)
Y
Branch
m(inch)
Header
m(inch)
6. When the any one (or both) of below conditions are satisfied, the diameter of main pipe must be increased.
•
The equivalent length between outdoor unit and the farthest indoor unit is 90m or more (Liquid and Gas pipes
are increased)
Refer to the table (Refrigerant pipe diameter from outdoor unit to first branch.) in the 'installation of outside
units' part.
7. Read cooling / heating capacity rate of change in the above figures based on the following equivalent length. :
overall equivalent length = (equivalent length of main pipe) X correction factor + (equivalent length after first
branching)
•
8, 10, 14, 16, 18, 20, 22, 24, 28, 30, 34HP
Rate of change
(object piping)
Cooling(Gas pipe)
Heating(Liquid pipe)
•
40, 42, 44, 48, 50, 54, 60HP
Rate of change
(object piping)
Cooling(Gas pipe)
Heating(Liquid pipe)
•
62, 64, 68, 70, 74, 80HP
Rate of change
(object piping)
Cooling(Gas pipe)
Heating(Liquid pipe)
316
Heat Pump
(1/2)
(5/8)
(3/4)
(7/8)
0.2
0.25
0.35
0.4
(7.9)
(9.8)
(13.8)
(15.7)
standard size
1.0
1.0
standard size
1.0
1.0
standard size
1.0
1.0
Ø31.8
Ø34.9
(1)
(1-1/8)
(1-1/4)
(1-3/8)
0.45
0.5
0.55
0.6
(17.7)
(19.7)
(21.7)
(23.6)
0.5(19.7)
1(39.4)
Correction factor
Correction factor
Correction factor
Outside Units
Ø38.1
Ø41.3
Ø44.5
Ø53.98
(1-1/2)
(1-5/8)
(1-3/4)
(2-1/8)
0.65
0.7
0.75
0.85
(25.6)
(27.6)
(29.5)
(33.5)
size increase
0.5
0.2
size increase
0.5
0.4
size increase
-
0.4
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