46
Note :
This diagram shows the case where the operation frequency of a compressor is fixed.
Heating performance curve
1.4
1.2
1.0
15 (59
˚
F)
15 (59
˚
F)
20 (68
˚
F)
20 (68
˚
F)
25 (77
˚
F)
25 (77
˚
F)
0.8
0.6
0.4
1.4
1.2
1.0
0.8
0.6
0.4
-12 -10
-5
0
5
10
15
INDOOR
D.B.(
˚
C)
INDOOR
D.B.(
˚
C)
OUTDOOR W.B.(
˚
C)
CAP
ACITY
(RA
TIO)
TOT
AL
INPUT
(RA
TIO)
Correcting the capacity line influenced by frosting
Not correcting the capacity line influenced by frosting
(10
˚
F) (14
˚
F)
(23
˚
F)
(32
˚
F)
(41
˚
F)
(50
˚
F)
(59
˚
F)
In some cases, heating operation cannot be
conducted with the maximum frequency in the
area below the slanting line.
In some cases, heating operation cannot be
conducted with the maximum frequency in the
area above the slanting line.
