Cooling Operation (Low Pressure, High Pressure); Heating Operation (Low Pressure, High Pressure) - Hitachi RCUE40AG2 Service Manual

Test run

Cooling operation:

Fig.4

Heating operation:

Fig.5

Fig.6

CAUTION:
For installation and
test run under low
ambient temperature,
like at the beginning
of summer, it is
possible to decrease
low pressure
abnormally.
In such case, heating
operation should be
run fi rstly and then
cooling operation.
(In case of air-cooled
heat pump)
pag. 23

2.2.2. Cooling operation (low pressure, high pressure)

Chilled water outlet temperature (ºC)

2.2.3. Heating operation (low pressure, high pressure)

Ambient WB temperature (ºC)
Low pressure and high pressure, corresponding to outlet temperature and
ambient DB temperature, are within the below area (at 100% operation) normally.
Fig. Standard operation pressure (at 100% operation)
Saturated Saturated
curve curve
Area need to clean
Chilled water outlet temperature (ºC)
(Cooling operation)

NOTE:
Fig.6 area need to be cleaned water side heat exchanger
SMGB0003 rev.0-01/2007
Ambient DB temperature (ºC)
Heated water outlet temperature (ºC)
Area need to clean Area need to clean
Saturated
curve
Warm water outlet temperature (ºC)
(Heating operation)
2 2