GESTRA NRGS 11-1, Руководство по установке, Страница: 13 / 24

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5. Check seating surfaces of threads or flange provided on vessel or boiler standpipe. Fig. 5
6. Place joint ring
C
onto seating surface of the threaded standpipe or flange. Fig. 5
Use only the joint ring (of stainless steel 1.4301, D 33 x 39 DIN 7603) supplied with the electrode.
7. Apply a light smear of silicone grease (e. g. Molykote
®
111) to electrode thread
A
.
8. Screw level electrode into threads or flange provided on vessel and tighten with a 41 mm open-end
spanner. The torque required when cold is 140 Nm.
Installation
NRGS 111, NRGS 161, NRGS 161 S
NRGS 111, NRGS 161
1. Determine required measuring lengths of electrode tips and enter data in table “Functions”.
Fig. 3
2. Cut electrode tips 1 , 2 , 3 and 4 accordingly.
3. Deburr faces of electode tips.
4. Strip off 50 mm of PTFE insulation from the ends of the electrode tips.
Molykote ® 11 1 is a registered trademark of DOW Corning Corp., Midland Michigan, USA
Table Functions
NRGS 161 S
9. Check seating surfaces and place joint ring onto the connecting standpipe.
10. Put flange
D
with level electrode onto connecting standpipe and secure with bolts.
Tighten bolts in diagonally opposite pairs.
Fig. 4
Please enter function and length.
Function Function Electrode tip Length [mm]
e. g. first low-level alarm 1
e. g. feed pump ON 2
e. g. feed pump OFF 3
e. g. high level alarm 4