Edwards EXC120, Инструкция по эксплуатации

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Operation
D396-14-880 Issue J
4 Operation
4.1 Start-up
Note: If you wish, you can start the backing pump and the EXT pump at the same time; the EXT pump will not be
damaged and can operate as an effective baffle. However, if the system pressure remains too high for the
EXT pump to reach 50% of full rotational speed in the preset time (set by the Internal Timer), the Controller
will trip into Fail condition: refer to
Section 3.12 for adjustment of the Internal Timer.
When Start is selected, if all Interlocks are closed, the Controller will switch on the electrical supply to the EXT pump
and the pump rotor will start to accelerate.
Use the following procedure to start up your system. This procedure assumes that you will manually operate the vent-
valve and the backing pump, however you can configure all EXC Controllers to automatically operate the vent-valve
and you can configure the EXC120, EXC300 and EXC300M Controllers to automatically operate the backing pump
(refer to Sections
1.8 and 3.13.3 ).
1. On EXC120, EXC300 and EXC300M Controllers, switch on the electrical supply isolator on the rear of the
Controller (see Figures 3 and 5 ).
2. Close the vent-valve (if fitted).
3. Start the backing pump.
4. Start the EXT pump:
z
On the EXC120, EXC300 and EXC300M Controllers, press the Start button on the front panel of the Controller
(Figures
1 and 2 , item 4) and (if you have connected your equipment to the logic interface) close the Start/
Stop input on the logic interface (see Section 1.7.3 ).
z
On the EXC120E Controller, close the Start/Stop input on the logic interface (see Section 1.7.3 ).
4.2 Standby
You can select Standby in one of two ways:
z
On the EXC120, EXC300 and EXC300M Controllers, select the Standby button on the front panel of the
Controller (Figures
1 and 2 , item 3).
z
Use your control equipment to close the Standby input on the logic interface (that is, ensure that the
appropriate pins are linked: see
Section 1.7 and Figures 8 and 9 ).
On the EXC120, EXC300 and EXC300M Controllers, the LED on the Standby button will go on when the Standby mode
is selected (either by the button or the logic interface).
If you select Standby when the pump is operating, the speed of the pump will be reduced to the Standby speed. If
you select Standby before you switch the pump on, the pump will run up to Standby speed, not up to full speed.