HEAT PUMP
WATER HEATER COMPRESSOR CRITERIA
PAGE：7/31
G
raph 1 图 1
P1 P2 P3 P4 P5 P6 P7 P8
Con
densing temperature
70℃ 25℃ 10℃ 10℃ 65℃ 80℃ 80℃ 80℃
Eva
poration Temperature
25℃ 25℃ 10℃ -35℃ -35℃ -10℃ -5℃ 15℃
*
Req
uirement for high pressure ratio condition can be seen on page 28.
6 Current limitation
Current peak among motor terminals（include instantaneous current peak）should be
bel
ow demagnetizing current in order to prevent magnet in motor from demagnetization.
7 Pressure difference between suction and discharge 吸气、排气压力差
In all a
llowable 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(the requirement can be seen on page 28).
8 D
ischarge pipe temperature
Discharge pipe temperature is measured at a distance 300mm from the surface of compressor
and should be less than 110℃. The tip of the thermocouple is fixed by soldering when
measuring discharge pipe temperature .Furthermore, soldering point is covered with urethane
foam to prevent the effect of wind.
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