Edwards EDS 300

7.6.2 Motor thermistors
7.6.3 Pump body thermal snap switch
Figure 14 Pump body thermal snap switch connecon
Wire the snap switch into the pump-motor control circuit so that it stops the pump motor.
This must be congured so that manual re-set is required.
Switching point(s) Connecon
Normally closed Plug: GSP3-U1
90 °C ± 5 K warning 90 °C: terminal 1 and 3
110 °C ± 5 K trip 110 °C: terminal 2 and 3
Switching capacity: 230 V a.c., 2.5 A see Figure: Wiring schemac-1 on page 32
The output of the thermal snap-switch has two connecons: one will open circuit when the
temperature of pump-body is higher than 90 °C. Use this output to provide a warning of high
temperature. The second output will open circuit when the temperature of pump-body is
higher than 110 °C. Use this output to shut-down the pump when it is too hot.
7.6.4 Grounding
Connect the pump to a suitable factory or plant earth (ground) via a M6 earth thread.
Figure 15 Grounding
1. M6 thread1. M6 thread
Page 34
A41802880_C - Installaon