Edwards nEXT300 User Manual

Send a command through the serial interface to close the vent valve before you send a
st
art command. This is known as a delayed start.
If you control the pump with the manufacturer's TIC Turbo and Instrument Controller or
TIC Turbo Controller, the TAV solenoid valve can be operated from the TIC. Refer to the
TIC Instrucon Manuals for more informaon.
4.9.4 Alternave valve connected to the vacuum system
If you use dierent vent valve, make sure that the applicable vent restrictor is installed in
the vacuum system to limit the rate of increase in pressure. Refer to Table: Vent
restrictor orice diameter (with atmospheric pressure at the inlet of the vent valve) for
informaon about the sizes of vent restrictor. If the applicable vent restrictor is not
installed, open the vent valve only when the speed of the pump decreases to 50% of the
full rotaonal speed.
Table 19 Vent restrictor orice diameter (with atmospheric pressure at the inlet of the vent
valve)
Vacuum system volume (litres) Orice diameter (mm)
< 20
£ 1.0
< 10
£ 0.7
< 5
£ 0.5
< 2
£ 0.35
4.10 Cooling
4.10
.
1 Introducon
CAUTION: PUMP COOLING
Risk of damage t
o equipment. Make sure that the pump is suciently cooled to
prevent the damage to the rotor and bearing.
When you use an alternave conguraon (other than the manufacturer's standard
cooling accessories) to cool the pump, make sure that the cooling is not directed or
ducted onto the pump controller.
CAUTION: VENTILATION FOR PUMP
Risk of damage t
o equipment. If the pump is in an enclosure, make sure that
sucient venlaon is available. The ambient temperature around the pump must
not be more than 40 °C.
▪ Natural convecon cooling: For the light pumping dues, with an ambient air
temperature less than 30 °C, natural convecon cooling can be sucient to cool
the pump.
▪ Forced air cooling: The ambient air temperature must be 5 °C to 35 °C when you
use the forced air cooling. make sure that there is sucient supply of cooling air to
the pump.
04/2022 - ©Edwards Limited
Page 60B80000880_G
B80000880_G - Installaon

Edwards nEXT300 Specifications

General

Brand	Edwards
Model	nEXT300
Category	Water Pump
Language	English