Outside Units
94
94
ARWN160LA2, ARWN180LA2, ARWN200LA2
Ex)
★
1. Symbols
HU : Level difference between indoor and outside units where indoor unit in inferior position (m)
HL : Level difference between indoor and outside units where indoor unit in superior position (m)
L : Equivalent pipe length (m)
α
: Capacity correction factor
2. 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.)
3. With this outside unit, evaporating pressure constant control when cooling, and condensing pressure constant control when heating is carried out.
4. If heat insulation of piping is insufficient, heat loss will become larger and capacity will decrease
5. 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
6. Assume equivalent pipe length of Y branch to be 0.5 m, that of header to be 1.0 m, calculation purposes.
7. When overall equivalent pipe length is 90 m or more, the diameter of the main gas and liquid pipes.
:
gas pipe
Ø28.58
→
Ø31.8
liquid pipe Ø
12.7
→
Ø15.88
8. 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 (equivalent length after first branching)
• (Cooling) Overall equivalent length =70 m x 0.5 + 40 m = 75 m
The correction factor in cooling capacity when HU = 10 m is thus approximately
0.886
• (Heatng) Overall equivalent length =70 m x 0.3 + 40 m = 61 m
The correction factor in heating capacity when HU = 10 m is thus approximately
0.814
correction factor
overall equivalent pipe length
< 90 m
≥
90 m
Cooling
1.0
0.5
Heating
1.0
0.3
Equivalent pipe
length 70 m
HU=10m
Equivalent pipe
length 40 m
Indoor unit
Outside
Indoor unit
Rate of change in cooling capacity
Rate of change in heating capacity
- -
-
-
- 0.92 0.90 0.89 0.88 0.86 0.85 0.84 0.83
- -
-
- 0.93 0.92 0.90 0.89 0.88 0.86 0.85 0.84 0.83
- -
- 0.95 0.93 0.92 0.90 0.89 0.88 0.87 0.85 0.84 0.83
- - 0.97 0.95 0.94 0.92 0.91 0.89 0.88 0.87 0.85 0.84 0.83
- 0.99 0.97 0.95 0.94 0.92 0.91 0.89 0.88 0.87 0.86 0.84 0.83
1.0
0.99 0.97 0.95 0.94 0.92 0.91 0.89 0.88 0.87 0.86 0.84 0.83
1.0
0.99 0.97 0.96 0.94 0.92 0.91 0.89 0.88 0.87 0.86 0.85 0.84
7.5
10
20
30
40
50
60
70
80
90
100
110
120
1.0
0.99 0.97 0.96 0.94 0.92 0.91 0.89 0.88 0.87 0.86 0.85 0.84
1.0
0.99 0.97 0.96 0.94 0.92 0.91 0.90 0.88 0.87 0.86 0.85 0.84
- 0.99 0.98 0.96 0.94 0.92 0.91 0.90 0.88 0.87 0.86 0.85 0.84
- - 0.98 0.96 0.94 0.93 0.91 0.90 0.88 0.87 0.86 0.85 0.84
- -
- 0.96 0.94 0.93 0.91 0.90 0.89 0.87 0.86 0.85 0.84
- -
-
- 0.95 0.93 0.91 0.90 0.89 0.87 0.86 0.85 0.84
- -
-
-
- 0.93 0.91 0.90 0.89 0.87 0.86 0.85 0.84
- - - - - 0.84
0.82
0.80
0.78
0.76
0.75
- - - - 0.87
0.84
0.82
0.80
0.78
0.76
0.75
- - - 0.90
0.87
0.84
0.82
0.80
0.78
0.76
0.75
- - 0.94
0.90
0.87
0.84
0.82
0.80
0.78
0.76
0.75
- 1.0 0.94 0.90 0.87 0.84 0.82 0.80 0.78 0.76 0.75
1.0
1.0 0.94 0.90 0.87 0.84 0.82 0.80 0.78 0.76 0.75
1.0
1.0 0.94 0.90 0.87 0.84 0.82 0.80 0.78 0.76 0.75
7.5
10
20
30
40
50
60
70
80
90
100
1.0
1.0 0.94 0.90 0.87 0.84 0.82 0.80 0.78 0.76 0.75
1.0
1.0 0.94 0.90 0.87 0.84 0.82 0.80 0.78 0.76 0.75
- 1.0 0.94 0.90 0.87 0.84 0.82 0.80 0.78 0.76 0.75
- - 0.94
0.90
0.87
0.84
0.82
0.80
0.78
0.76
0.75
- - - 0.90
0.87
0.84
0.82
0.80
0.78
0.76
0.75
- - - - 0.87
0.84
0.82
0.80
0.78
0.76
0.75
- - - - - 0.84
0.82
0.80
0.78
0.76
0.75
α
L(m)
L(m)
α
α
α
50 -
40 -
30 -
20 -
10 -
7.5 -
0
0
0
7.5 -
10 -
20 -
30 -
40 -
50 -
50 -
40 -
30 -
20 -
10 -
7.5 -
0
0
0
7.5 -
10 -
20 -
30 -
40 -
50 -
HU
(m)
HL
(m)
HU
(m)
HL
(m)
