Opening The Valve - GE Hydran 201i Installation Manual

5.6 Opening the Valve

CAUTION
1. Using the supplied 5/32-in Allen key, fully close the sensor's bleed screw and
then open it 1/8 of turn.
2. Slowly open the transformer valve until oil leaks out of the sensor's sampling
port (see Figure 16 below).
3. When there are no more air bubbles present in the oil, shut the bleed screw
tightly.
4. Open the valve completely.
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This step should be performed according to company
regulations. Proceed carefully to avoid introducing air into the
transformer. Use a bucket to collect the oil.
Figure 16: Purging Air from the Hydran 201 Sensor
Hydran* 201i Installation Guide
17996 Rev5, August 2013