Hitachi Highly WHP07600PSD, Installation Manual, Page: 9 / 33

H E A T P U M P W A T E R H E A T E R C O M P R E S S O R C R I T E R I A
PAGE：7/30
G
raph 1 图 1
P1 P2 P3 P4 P5 P6 P7 P8
Condensing temperature
70 ℃ 25 ℃ 10 ℃ 10 ℃ 65 ℃ 80 ℃ 80 ℃ 80 ℃
Evaporation Temperature
25
℃
25
℃
10
℃
-30
℃
-30
℃
-10
℃
-5
℃
15
℃
6 Current limitation
Current peak among motor terminals（include instantaneous current peak）should be
below d emagnetizing current in order to prevent magnet in motor from demagnetization.
7 Pressure difference between suction and discharge
In all allowable rotational speed range, the difference of pressure should be more than
0.39MPa{4kgf/cm
2
}. But if there is no problem of noise when assembled in air conditioner,
it can also below this value.