Sanyo DHX4852 - Manual (Page 25)

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2-15
Design of W-2WAY ECO-i SYSTEM Unit Specifications
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<Cooling>
El
ev
ation dif
ference (ft
)
Base capacity
change rate
*1
92 90 88 86 84 82 80 78 76
94
96
98
100
%
0 33 66 98 131 164 197 230 262 295 328 361 394 427 459 492 0 33 66 98 131 164 197 230 262 295 328 361 394 427 459 492
164
131
98
66
33
0
–33
–66
–98
–131
Equivalent length (ft)
*1 Sample calculations
(System: 20 HP, 164ft equivalent length, 49ft elevation
difference
The cooling capacity and heating capacity for this system are
found as shown below.)
● Cooling operation
From the table, the correction coefficient for that horsepower
level is found to be 1.00.
From the graph, the base capacity change rate is found to be
92.0%.
92.0%
× 1.00 = 92.0%
Capacity change rate is 92.0%. (56.0kW × 92.0% = 51.5kW)
92.0% = 175,800 BTU/h
Cooling capacity is
175,800 BTU/h (51.5 kW)
● Heating operation
From the table, the correction coefficient for that horsepower
level is found to be 1.00.
From the graph, the base capacity change rate is found to be
97.2%.
97.2%
× 1.00 = 97.2%
Because the calculation result exceeds 97.2%, the capacity
change rate is 97.2%.
(63.0kW × 97.2% = 61.2kW) Heating capacity is
209,000 BTU/h (61.2 kW)
Cooling Heating
Item
Model (SPW-)
Cooling
capacity
(kW) Power
consumption
(kW) Heating
capacity
(kW) Power
consumption
(kW)
<50Hz models>
22.4
28.0
33.5
40.0
45.0 5.99
7.90
9.58
11.6
13.3 25.0
31.5
37.5
45.0
50.0 6.17
7.15
9.60
11.5
13.2
Equivalent length (ft)
<Heating>
Base capacity
change rate
164
131
98
66
33
0
–33
–66
–98
–131
0 33 66 98 131 164 197 230 262 295 328 361 394 427 459 492
El
ev
ation dif
ference (ft
)
191,100 BTU/h ×
97.2% = 209,000 BTU/h 215,000 BTU/h ×
1-8. Capacity Correction Graph According to Tubing Length and Elevation Difference
Capacity change characteristics
The positive side for the elevation difference indicates that
the outdoor unit is installed at a higher position than the
indoor units. The negative side indicates the opposite.
NOTE
1. Model Selecting and Capacity Calculator
Rated performance values
Item Cooling Heating
Type
Cooling capacity
BTU/h(kW)
Power consumption
BTU/h(kW)
Heating capacity
BTU/h(kW)
Power consumption
BTU/h(kW)
90 95,500(28.0) 27,000(7.90) 107,500(31.5) 26,500(7.75)
140 153,600(45.0) 45,400(13.3) 170,600(50.0) 45,000(13.2)
TD831138-02_W-2WAY.indb 15 2007/07/26 14:30:40