¢ Calculation example
E
xample 1
Design conditions
Indoor temperature Outdoor temperature Pipe length Height difference
82°FDB/68°FWB
(27.8°CDB/20°CWB)
95°FDB
(35°CDB
)
246 ft
(75 m)
65 ft (20 m)
Outdoor unit higher side
Outdoor
unit
Room 1 Room 2 Room 3 Room 4 Room 5
Pipe length (L) = 246 ft (75 m)
Height difference (H) = 65 ft (20 m)
Indoor
unit 1
Indoor
unit 2
Indoor
unit 3
Indoor
unit 4
Indoor
unit 5
• Selection of indoor unit
No Item
Room
Remark
1 2 3 4 5
A-1 Cooling heat load kBtu/h 20.4 20.4 20.4 6.8 5.1
A-2
Indoor unit models
(Example: AU)
AUUB
24
AUUB
24
AUUB
24
AUUA
9
AUUA
7
A-3 (TCin)r kBtu/h 24.0 24.0 24.0 9.5 7.5
Refer to “Indoor units” of "Outdoor
unit and indoor unit lineup" in
Chapter 1. GENERAL
INFORMATION on page 01-1.
A-4 (TCin)d kBtu/h 25.1 25.1 25.1 9.9 7.8
Refer to "Cooling capacity table
(Indoor unit)" on page 02-14.
A-5
Compensation coefficient of
pipe length
0.9
Refer to "Capacity compensation
coefficient" on page 02-13.
A-6 (TCin)e kBtu/h 22.6 22.6 22.6 8.9 7.0 (A-4) × (A-5)
A-7 ∑(TCin)r kBtu/h 89.0 Sum of A-3
A-8 ∑(TCin)d kBtu/h 93.0 Sum of A-4
1-3. Capacity calculation method - (02-6) - 1. Model selection and capacity calculation
MODEL
SELECTION
MODEL
SELECTION
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