Engineering Manual
56
Note : This diagram shows the case where the operation frequency of a compressor is fixed.
Heating performance curve
15 (59
˚
F)
20 (68
˚
F)
25 (77
˚
F)
INDOOR
D.B.(˚C)
CAPACITY (RATIO)
15 (59
˚
F)
20 (68
˚
F)
25 (77
˚
F)
OUTDOOR W.B.(˚C)
TOTAL INPUT (RATIO)
Correcting the capacity line influenced by frosting
Not correcting the capacity line influenced by frosting
0.4
0.6
0.8
1.0
1.2
1.4
In some cases, heating operation cannot be
conducted with the maximum frequency in the
area below the slanting line.
-20
(-4˚F)
-15
(5˚F)
-10
(14˚F)
-5
(23˚F)
0
(32˚F)
5
(41˚F)
10
(50˚F)
15
(59˚F)
0.4
0.6
0.8
1.0
1.2
1.4
In some cases, heating operation cannot be
conducted with the maximum frequency in the
area below the slanting line.