12
2
Equipment selection procedure
2-3. Cooling / heating capacity characteristics
2-3-1. Correction charts for cooling capacity calculation
[1] Capacity correction value vs. indoor air wet bulb temperature
[2] Capacity correction value vs. outdoor air dry bulb temperature
[3] Capacity correction value vs. connecting pipe length and lift difference between indoor and
outdoor units
[4]* Correction of outdoor unit diversity
* : Coefficient to use for correction of outdoor unit capacity when total capacity of the indoor units are not equal to the outdoor unit
capacity.
㪇㪅㪏㩷
㪇㪅㪐㩷
㪈㪅㪇㩷
㪈㪅㪈㩷
㪈㪅㪉㩷
㪈㪌
㪉㪇
Cap
a
ci
ty
cor
rec
tion value
Indoor air wet bulb temp. (°C)
0.8
0.9
1.0
1.1
1.2
-5
0
5
10 15
20
25 30 35 40
Cap
a
ci
ty cor
re
c
tion val
u
e
Outdoor air dry bulb temp. (°C)
Height of
out
door
unit H
[m]
Pipe length (Equivalent length) L [m]
Cap
acity correctio
n value
Indoor units total capacity ratio (%)
Standard capacity ratio
