Morgan Schaffer Calisto - Figure 22: Flushing the Oil RETURN Tube

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Figure 22: Flushing the Oil RETURN Tube
4. Slowly turn the INLET valve (right side) counterclockwise ¼ turn to the vertical position to
flush the SUPPLY line with oil. Now, turn the main supply switch to the <I> (ON) position
to start the internal oil circulation pump to enable flushing (See Figure 23). To avoid
injecting trapped air into the transformer, wait until a minimum of 500 cc of oil is flushed
again and turn the main supply switch to the <O> position (OFF).
NOTICE
Before proceeding with Step 5, the following checks should be made:
 The earth ground is properly connected.
 The mains power is protected by a circuit breaker.
 The main supply switch is in the “O” position (OFF).
 Both transformer oil supply and oil return valves are open.
 Both monitor oil INLET and oil OUTLET valves are closed.