A708-01-880 Issue E
Page 30 © Edwards Limited 2013. All rights reserved.
Edwards and the Edwards logo are trademarks of Edwards Limited.
Installation
3.6 Connect the temperature sensor (CDX pumps only)
Ensure to route the temperature sensor cable away from hot surfaces of the pump or other equipment. If not,
the cable may be damaged.
The temperature sensor measures the oil temperature in the end cover. Connect the output of the sensor to a
suitable control circuit to shut down the pump when it reaches an unsafe temperature.
Set the trip setpoint of the control circuit (that is, the temperature setpoint at which the control circuit will shut
down the pump) as follows:
z For safe area and non-ATEX compliant systems, set the trip setpoint to 95 °C (203 °F) when using an air
shaft-seals purge, and 115 °C (239 °F) when using nitrogen shaft-seals purge.
z For ATEX compliant systems, the trip setpoint will be defined in the ATEX system instruction manual.
Connect the temperature sensor as follows:
1. Refer to Figure 8, detail B. Remove the top cover (3) from the sensor (5).
2. Fit a suitable cable-gland to the cable leadthrough hole (4).
3. Pass a suitable two-wire control cable through the cable-gland and into the sensor.
4. Refer to detail A. Connect the two control cable wires to terminals 1 and 2 (1, 2), as shown in the circuit
schematic in detail C.
5. Tighten the cable-gland, then refit the top cover (3).
6. Connect the other ends of the two control cable wires to the control circuit.
Connect the temperature sensor to a suitable control circuit to shut down the pump when it
overheats. If not, the system will not be ATEX compliant (if applicable), pump damage can occur,
and there may be a risk of explosion or fire.
Incorporate a manual reset device in the control equipment. If not (and the temperature sensor
causes the control circuit to shut down the pump), the pump will automatically switch on again
when it cools down. If maintenance or fault finding has been started on the pump, there will then
be a risk of fire or explosion and injury to people.
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