Vaisala MHT410 Guía Rápida página 19

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5. Start opening the valve very carefully to let air out through the bleed screw.
CAUTION!
nut will flow into the transformer instead.
When oil flows out, close the bleed screw. Clean the area with a cloth and open the ball
valve fully.
SLOW
6. Continue tightening the mounting nut with a wrench. Be very careful not to over-tighten
the connection. Approximately 5 ... 8 mm of the mounting nut threads remain outside the
valve.
If the connection leaks after you have tightened the mounting nut, check the
thread type of the installation valve.
• If the valve thread is other than female 1.5" NPT (incorrect), do not
install the transmitter in that valve.
• If the valve thread is female 1.5" NPT (correct), close the valve, open
the mounting nut and remove the transmitter, remove old PTFE tape
and apply a thicker layer of new PTFE tape. Then continue from
step
If you open the valve too quickly, the air inside the mounting
3.
Chapter – Installation
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