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Page 57
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Operation
B800-00-880 Issue D
For information on how to perform these settings, refer to the TIC Turbo and Instrument Controller or TIC Turbo
Controller Instruction Manuals.
Note:
It is not possible to configure the analogue output options using the TIC. There is also no facility within the
TIC to assign a multi-drop address to the nEXT pump.
There is a further option of connecting the TIC to a PC and using the TIC PC program to configure the nEXT pump.
The TIC PC program allows for the configuration of all settings shown in the list above as well as allowing
configuration of the analogue output options and assignment of a multi-drop address. Refer to the TIC PC program
Instruction Manual for more information.
4.3
Before starting the pump
Irrespective of the system used to control the nEXT pump, work through the following steps before starting the pump.
4.3.1
Close the vent valve
If using a manual vent valve, turn it clockwise to close it.
If using the customer control system to drive a vent valve, make sure that the vent valve is closed.
If driving a TAV solenoid valve from the controller, the TAV valve will automatically shut when the pump is
started.
If using the TIC to operate the vent valve, refer to
Section 4.7
.
Note:
The backing pump and nEXT pump can be started at the same time. The nEXT pump will not be damaged
and can operate as an effective baffle, however, if the vacuum system is large (100 litres or larger) it will
be more efficient to allow the backing pump to reduce system pressure to 10 mbar before starting the nEXT
pump. In this case it will be necessary to close the vent valve in advance of starting the backing pump.
When using the controller to control a TAV solenoid valve and operating with parallel control and monitoring, the
valve can not be shut in advance of starting the nEXT pump because the facility to send the appropriate serial
command is not available. If the facility to send serial commands is available, a delayed start can be performed, refer
to
Section 4.5.1
.
4.3.2
Pre-start checks
1. Turn on the appropriate cooling device (fan or cooling water supply).
Note:
If the controller has been configured to drive a fan, the fan will automatically start when power is supplied
to the nEXT pump.
2. Start the backing pump.
3. Switch on the power supply to the pump. Check that the three LEDs on the controller light up for approximately
0.5 seconds and then extinguish.
If the LEDs do not light up as expected, or if the red or yellow LED begins to flash a repeated sequence or if the red
LED is lit, refer to
Section 5.5
.
