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Multi V Water 5
8. Capacity Correction Factor
CRWM360BAS5, CRWM420BAS5
Level
difference
(=IDU-ODU)
7.5
10
20
30
(m)
-50
-
-
-
-40
-
-
-
-30
-
-
-
100.0
-20
-
-
100.0
100.0
-10
-
100.0
100.0
100.0
-7.5
100.0
100.0
100.0
100.0
0
100.0
100.0
100.0
100.0
7.5
100.0
100.0
100.0
100.0
10
-
100.0
100.0
100.0
20
-
-
100.0
100.0
30
-
-
-
100.0
40
-
-
-
50
-
-
-
Note
■ These figures indicate 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.)
■ With this outdoor(outside) unit, evaporating pressure constant control when cooling, and condensing pressure constant control
when heating is carried out.
■ If heat insulation of piping is insufficient, heat loss will become larger and capacity will decrease.
■ Method of calculating cooling / heating capacity = maximum cooling / heating capacity of outdoor(outside)units
= cooling / heating capacity of outdoor(outside) units obtained from capacity table x capacity correction factor due to piping length
to the farthest indoor unit.
■ Equivalent piping length for Y Branch and other pipes can be calculated with following table.
Piping Diameter
Ø6.35
Ø9.52
[mm(inch)]
(1/4)
Elbow(m)
0.16
Y Branch(m)
Header(m)
HR unit(m)
■ When the any one (or both ) of below conditions are satisfied, the diameter of main pipe must be increased.
- The equivalent length between outdoor(outside) unit and the farthest indoor unit is 90m or more
(Liquid or Gas pipes are increased in accordance with below table)
- The level difference (outdoor(outside) unit <-> Indoor unit) is 50m or more (Only liquid pipe is increased)
Refer to the table (Refrigerant pipe diameter from outdoor(outside) unit to first branch.) in the 'installation of outdoor(outside) units' part.
■ 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)
Rate of Change
(object piping)
Cooling(Gas pipe)
Heating(Liquid pipe)
※ Accordance with product type(operation mode), target region, model line up could be different.
Apply the correction factor after selecting that according to the unit capacity.
■ Calculation Example for overall equivalent length
* Installation condition : Model capacity = 8HP, Main pipe length = 30m, Branch pipe length = 30m, HU=0m
(Maximum pipe length and limit condition will be different by each model. Use this example only for reference.)
: Overall equivalent pipe length for Cooling = 30m x 0.5 + 30m = 45m
: Overall equivalent pipe length for Heating = 30m x 0.2 + 30m = 36m
* The rate of change in
Read the correction factor value condition on length = 45m and HU = 0 in Cooling correction factor table.
Read the correction factor value condition on length = 36m and HU = 0 in Heating correction factor table.
Capacity correction factor (%) by equivalent pipe length (m)
40
50
60
70
80
-
-
100.0
100.0
100.0
100.0
100.0
-
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
-
100.0
100.0
100.0
100.0
100.0
100.0
-
-
100.0
100.0
100.0
100.0
100.0
Ø12.7
Ø15.88
Ø19.05
(3/8)
(1/2)
(5/8)
(3/4)
0.18
0.20
0.25
0.35
standard size
1
1
90
100
110
120
130
140
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
100.0
Ø22.2
Ø25.4
Ø28.58
Ø31.8
(7/8)
(1)
(1-1/8)
(1-1/4)
0.40
0.45
0.50
0.55
0.50
1.00
0.25
Correction factor
Capacity Class ≤ 34HP
Capacity Class ≤ 60HP
0.5
0.2
8-4
Product Data
150
160
170
180
190
200
100.0
100.0
-
-
-
-
100.0
100.0
-
-
-
-
100.0
100.0
-
-
-
-
100.0
100.0
-
-
-
-
100.0
100.0
-
-
-
-
100.0
100.0
-
-
-
-
100.0
100.0
-
-
-
-
100.0
100.0
-
-
-
-
100.0
100.0
-
-
-
-
100.0
100.0
-
-
-
-
100.0
100.0
-
-
-
-
100.0
100.0
-
-
-
-
100.0
100.0
-
-
-
-
Ø34.9
Ø38.1
Ø41.3
(1-3/8)
(1-1/2)
(1-5/8)
0.60
0.65
0.70
size increase
Capacity Class ≥ 62HP
0.5
0.4
210
220
225
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Ø44.5
Ø53.98
(1-3/4)
(2-1/8)
0.75
0.85
-
0.4
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