MEES19K180
PURY-H
P-
T(
S)NU-
A, Y(S)
NU-A
33
8. CAPACITY TABLES
Hyper Heating Inverter R2-Series
0.98
Ratio of heating capacity
2
Outdoor Temperature [°CW.B.]
25
0.8
Indoor Temperature [°CD.B.]
Ratio of heating capacity
<Heating>
Design Condition
Outdoor Design Wet Bulb Temperature
2 ºC
Total Heating Load
18.2 kW
Room1
Indoor Design Dry Bulb Temperature
25 ºC
Heating Load
9.2 kW
Room2
Indoor Design Dry Bulb Temperature
25 ºC
Heating Load
9.0 kW
<Other>
Indoor/Outdoor Equivalent Piping Length
30 m
2. Heating Calculation
(1) Temporary Selection of Indoor Units
Room1
PEFY-P36
11.7 kW (Rated)
Room2
PEFY-P36
11.7 kW (Rated)
(2) Total Indoor Units Capacity
P36 + P36 = P72
(3) Selection of Outdoor Unit
The P72 outdoor unit is selected as total indoor units capacity is P72
PUHY-P72
23.4 kW
(4) Total Indoor Units Capacity Correction Calculation
Room1
Indoor Design Dry Bulb Temperature Correction (25ºC)
0.80 (Refer to Fig.4)
Tbl.1 Table of correction factor at frost and defrost
Room2
Indoor Design Dry Bulb Temperature Correction (25ºC)
0.80 (Refer to Fig.4)
CTi = Σ (Indoor Unit Rating × Indoor Design Temperature Correction)
= 11.7 × 0.80 + 11.7 × 0.80
= 18.7 kW
(5) Outdoor Unit Correction Calculation
Outdoor Design Wet Bulb Temperature Correction (2ºC)
0.98 (Refer to Fig.5)
Piping Length Correction (30 m)
Defrost Correction
0.98 (Refer to Fig.6)
0.84 (Refer to Tbl.1)
Total Outdoor Unit Capacity (CTo)
Total Indoor Units Capacity (CTi)
CTo = Outdoor Unit Rating × Outdoor Design Temperature Correction × Piping Length
Correction × Defrost Correction
= 23.4 × 0.98 × 0.98 × 0.84
= 18.8 kW
(6) Determination of Maximum System Capacity (CTx)
Comparison of Capacity between Total Indoor Units Capacity (CTi) and Total Outdoor Unit Capacity (CTo)
CTi = 18.7 < CTo = 18.8, thus, select CTi.
CTx = CTi = 18.7 kW
(7) Comparison with Essential Load
Against the essential load 18.2kW, the maximum system capacity is 18.7kW: Proper outdoor units have been selected.
(8) Calculation of Maximum Indoor Unit Capacity of Each Room
CTx = CTi, thus, calculate by the calculation below
Room1
Indoor Unit Rating × Indoor Design Temperature Correction
= 11.7 × 0.80
= 9.4 kW
OK: fulfills the load 9.2kW
Room2
Indoor Unit Rating × Indoor Design Temperature Correction
= 11.7 × 0.80
= 9.4 kW
OK: fulfills the load 9.0kW
Completed selecting units since the selected units fulfill the heating loads of Room 1, 2.
Outdoor inlet air temp. °CWB
6
4
2
1
0
-2
-4
-6
-8
-10
-20
Outdoor inlet air temp. °FWB
43
39
36
34
32
28
25
21
18
14
-4
PUHY-P72
PUHY-P96
PUHY-P120
PUHY-P168
Fig.4
Indoor unit temperature correction
To be used to correct indoor unit only
Fig.5
Outdoor unit temperature correction
To be used to correct outdoor unit only
Fig.6
Correction of refrigerant piping length
1.00 0.95 0.84 0.83 0.83 0.87 0.90 0.95 0.95 0.95 0.95
1.00 0.95 0.84 0.83 0.83 0.87 0.90 0.95 0.95 0.95 0.95
1.00 0.93 0.82 0.80 0.82 0.86 0.90 0.90 0.95 0.95 0.95
1.00 0.93 0.82 0.80 0.82 0.86 0.90 0.90 0.95 0.95 0.95
PUHY-P144
1.00 0.93 0.82 0.80 0.82 0.86 0.90 0.90 0.95 0.95 0.95
30
Heating capacity correction factor
0.98
Piping equivalent length (m)
0000005744.BOOK 33 ページ ２０２０年２月２５日 火曜日 午後５時１９分
