Flowserve NRG 16-50 - Manual (Page 16)

6
Installation
NRG 16-50, NRG 17-50, NRG 19-50, NRG 111-50, step 1
. Screw electrode tip 4 into measuring electrode 1 . Fig. 8
. Carefully determine required measuring length of electrode.
3. Mark length of electrode tip
4 .
4. Unscrew electrode tip 4 from measuring electrode 1 and cut tip.
5. After visual inspection screw electrode tip 4 into measuring electrode 1 . Slide spring 3 along
electrode tip 4 so that its end completely enters the small hole 2 .
NRG 16-50, NRG 17-50, NRG 19-50, NRG 111-50, step 2
6. Check seating surfaces. Fig. 12
7. Place joint ring 5 onto seating surface 6 of the electrode. Fig. 9
8. Apply a light smear of silicone grease (e. g. WINIX ® 50) to electrode thread 7 .
9. Screw level electrode into threads or flange provided on vessel and tighten with a 4 mm open-end
spanner.
The torque required when cold is 160 Nm.
NRG 16-50 F, NRG 17-50 F, NRG 19-50 F, additional information
If one level electrode NRG ...-50 is installed together with one level electrode, one level switch or
transmitter (with aluminium terminal box) in a single protection tube or level pot, please observe the
following:
. Mount the first level electrode as specified in the pertinent installation manual.
When installing level electrode NRG ...-50 F, please observe the following instructions:
. Unscrew screws
g and remove housing cover i . Fig. 14. The arrow on the name plate points
towards this cover..
. Remove cable lugs from terminal lugs. Fig. 15
3. Loosen nut j with a 9 mm spanner, but do not remove! Fig. 15
4. Screw in level electrode as described in items 6 – 9.
5. Turn terminal box into desired position (+/– 80°).
The terminal box can now be turned through +/– 180°.
6. Tighten nut
j with a torque of 25 Nm.
7. Plug cable lugs onto terminal lugs.
8. Mount housing cover i and tighten screws g .
WINIX ® 50 is a registered trademark of WINIX GmbH, Norderstedt