Check The Direction Of Rotation Of The Motor; Connecting The Heat Exchanger Fan; Leak Check After Installation; Figure 16 Heat Exchanger Fan Connection - Edwards EDS 200 Instruction Manual

7.6.5 Check the direction of rotation of the motor

Blank the inlet or connect the EDS pump to the vacuum system before you check the
direction of pump rotation. If you do not, there is danger of objects being trapped in the
rotating pump rotors.
Direction of rotation is clockwise as viewed from the motor end of the pump. View the
motor fan direction.
Let the pump run up briefly (for approximately 1 second) and then immediately switch it off
again.
If the rotation direction is incorrect, isolate and lock-out the power supply, then change the
phases on the pump-motor and recheck direction.

7.6.6 Connecting the heat exchanger fan

(only for air cooled versions)
Connect the heat exchanger fan as shown.

Figure 16 Heat exchanger fan connection

1. Heat exchanger fan connection 1. Heat exchanger fan connection
The direction of rotation is indicated. Check the direction of rotation by viewing the fan. If
the direction of rotation is incorrect, the live and neutral phases are incorrectly wired.
Power supply must be intrinsically safe according to EN 61010 and the fan supply must be
fused with maximum 4 A.

7.7 Leak check after installation

EDS pumps are not hermetical sealed and leak tight by principle. Leak-check all relevant
connections after having installed the pump.
A41802880_C - Installation
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