Hydran* 201
i
Installation Guide
Page 28
17996 Rev5, August 2013
5.6
Opening the Valve
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.
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).
Figure 16: Purging Air from the Hydran 201 Sensor
3.
When there are
no more air bubbles
present in the oil, shut the bleed screw
tightly.
4.
Open the valve completely.
CAUTION
