© Edwards Limited 2013. All rights reserved. Page 35
Edwards and the Edwards logo are trademarks of Edwards Limited.
Installation
A708-01-880 Issue E
current. This overload current must not exceed the maximum current rating shown on the rating plate on the pump
motor.
The pump motor can be started either Direct On-Line (DOL) or through a suitable inverter.
Refer to the motor instruction manual (supplied with the pump) for starting and overload protection requirements.
3.10.2 Connect the electrical supply to the pump motor
Connect the electrical supply to the pump motor in accordance with the requirements specified in the motor
instruction manual (supplied with the pump).
3.10.3 Connect the thermistor outputs
The motor windings are fitted with thermistors which are terminated in the motor terminal box. Connect the
thermistor outputs to a suitable control circuit to isolate the electrical supply from the pump motor and shut down
the pump if the windings overheat.
Connect the thermistor outputs to a suitable control circuit in accordance with the requirements specified in the
motor instruction manual (supplied with the pump).
3.11 Connect the pump to earth (ground)
1. Refer to Figure 1, 2 or 3, detail E. Connect one end of a suitable earth (ground) conductor to the earth (ground)
stud (28).
2. Connect the other end of the conductor to a suitable earth (ground) point in the installation.
3.12 Check the direction of pump rotation
Note: The pump must be heated to at least +5 °C (41 °F) before starting or rotating the pump.
If the CDX pump is part of an ATEX system, it must be powered by an electrical supply at the rated
frequency of the pump motor, unless the system is specifically designed to operate with a variable
speed drive. If this is the case, consult the ATEX system instruction manual.
Connect the pump motor thermistor outputs to a suitable control circuit to isolate the electrical
supply when the pump motor overheats. If not, the pump can be damaged, and there may be a risk
of explosion or fire.
Incorporate a manual reset device in the control equipment. If not (and a fault which causes the
thermistors to shut down the pump is not corrected), the pump will automatically switch on again
when the motor windings cool down. If maintenance or fault finding has started on the pump, there
will then be a risk of injury to people.
Connect the pump earth (ground) stud to a suitable earth (ground) point. If not, static electricity
build-up might provide a source of ignition, and lead to explosion or fire.
To Next Page
Loading...
Need help?
General
