SMC Networks HRSH250-W*-20 Series User Manual

HRX-OM-Q026
Chapter 5 Display and Setting of Various Functions
HRSH Series 5.17 Pump Operation Mode Setting
5-39
5.17 Pump Operation Mode Setting
5.17.1 Pump operation mode
Pump operation mode can be selected from the two modes shown below.
●Pressure control mode
The pump in this product automatically controls the circulating fluid
discharge pressure to be the set pressure.
When the piping resistance is too small, the actual pressure may not
reach the set pressure.
In such a case, the pressure fails to increase due to the too small piping
resistance even though the pump discharges the maximum flow.
This is not a malfunction of this product.
When the piping resistance is too large, the actual pressure may not
decrease to the set pressure. In such a case, the pressure fails to
decrease due to the too large piping resistance even though the pump
discharges the minimum flow.
This is not a malfunction of this product.
●Frequency set mode
The pump in this product is operated at the set frequency.
Use this mode when pressure control is not necessary.
5.17.2 How to set/check the pump operation mode and value
How to set the pump operation mode, how to set the value for each mode,
and the default setting and the default setting/value are shown below.
Table 5.17-1 Pump operation mode setting
Display
Item
Content
Default
Pump operation
mode setting
Sets the pump operation mode.
PRS
Circulating fluid
discharge pressure
Sets the circulating fluid discharge pressure
when the pump operates in the pressure
control mode.
HRSH250/300-A
0.50
HRSH100/150/200-A
HRSH150/200/150-W
0.45
Pump operation
frequency setting
Sets the pump operating frequency for the
frequency set mode.
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[Tips]
When AL.25(circulating fluid discharge pressure sensor failure) occurs in a
pressure control mode, a pump operation mode shifts to a frequency setting
mode automatically.

SMC Networks HRSH250-W*-20 Series Specifications

General

Brand	SMC Networks
Model	HRSH250-W*-20 Series
Category	Chiller
Language	English