▪ Natural convection cooling – only for nEXT730D, nEXT930D, nEXT730H and
nEXT930H:
For some light pumping duties, with an ambient air temperature less than 25 °C,
natural convection cooling may be adequate to cool the nEXT pump.
▪ Forced air cooling – option:
The ambient air temperature must be 5 °C to 40 °C when using forced air cooling.
Ensure that there is an adequate supply of cooling air to the pump.
▪ Water cooling – standard for nEXT730Q, nEXT930Q and nEXT1230H, option for
nEXT730D, nEXT930D, nEXT730H and nEXT930H:
Use water cooling with higher load applications or when using a flange heater (CF
variants only). When using water cooling, ambient air temperature must be less
than 40 °C and the water temperature must be between 10 °C and 40 °C.
Refer to Figure: Cooling requirements for nEXT730H, Figure: Cooling requirements for
nEXT730Q/930Q, Figure: Cooling requirements for nEXT730D/930D and Figure: Cooling
requirements for nEXT1230H for further performance information.
5.8.2 Forced air cooling
The customer controller can be configured to drive an air cooler only if commands can
be sent via the serial interface or an Edwards TIC Turbo and Instrument Controller or
Turbo Controller.
Air cooling accessories are available for nEXT pumps. Fit the air cooler as described in
the instruction manual supplied with it. If an alternative fan is used for air cooling,
ensure that the flow rate is above 100 m
3
h
-1
(60 cfm).
The air cooler can be powered by a customer external power supply, the Edwards TIC
Turbo and Instrument Controller, the TIC Turbo Controller or the nEXT Controller. Plug
the connector into the socket at the side of the controller.
5.8.3 Water cooling
Figure 40 Attaching the water cooling
1. Hose connections for 6x1 hose
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