Edwards EXS Series User Manual

CAUTION:
Do not keep the c
ooling water supply on if the pump is not going to be required for
some me, otherwise, water condensing outside the pipe might cause corrosion of
element.
Refer to Table: Stop sequences for the stop sequences.
Table 16 Stop sequences
Sequence Descripon
Stop sequence
Inlet purge gas valve is opened.
Inlet isolaon valve is closed (if ed).
Pump runs for 15 minutes before stopping.
Close all gas purge aer the pump stops.
Switch o water-cooling by closing both inlet and outlet aer
at least 60 minutes aer pump stops
If the pump is not going to be required for some me, switch o the electrical supply
and the cooling water supply. Seal the pump inlet and exhaust to prevent any moisture
in the atmosphere from corroding the pumping mechanism.
6.3 Automac shut down
Normally, if an alarm condion exists, the control system will shut down the dry
pumping system. When the dry pumping system shuts down, the pump stops.
Table 17 Alarm acons
Alarm descripon
Alarm stops the dry pump
EMS Yes
Stator temperature is over 130° C Yes
Motor snap switch tripped Yes
Overload relay tripped Yes
Inverter overload Yes
6.4 Unplanned shut down and alarms
The dry pumping s
ystem is ed with thermal protecon sensors that will give warnings
and alarms. Refer to Table: Pump protecon sensors.
Table 18
Pump protecon sensors
Sensor
Warning condion triggered Alarm condion triggered
DP TEMP temperature
EXS750 120 °C 130 °C
EXS450 120 °C 130 °C
Refer to Automac shut down on page 52 for informaon about alarms and automac
shutdown condions.
07/2021 - ©Edwards Limited
Page 52A41870880_A
A41870880_A - Operaon

Edwards EXS Series Specifications

General

Brand	Edwards
Model	EXS Series
Category	Water Pump
Language	English