Flowserve NRGS15-1 - Manual (Page 16)

16
Installation
Level switch NRGS 15-1
We highly recommend that only qualified staff should carry out installation work in accord-
ance with these installation instructions. The manufacturer expressly rejects any claims
for damage caused by improper installation.
Before installing the electrode cut the electrode rods to length, make sure that 50 mm of
the PTFE insulation are stripped off (see Fig. 2) and establish the functions.
The supplied spacer discs must be slipped over the electrode tips and distributed uni-
formly to ensure sufficient spacing between the tips.
1. Check that seating surfaces of threads or mounting flange provided on vessel or boil-
er standpipe (see Fig. 3) are accurately machined. If necessary rework the surfaces
according to the specifications indicated in the drawing.
2. Place joint ring (supplied with the electrode) onto the seating surface of the elec-
trode.
3. Apply a light smear of silicone grease to the electrode thread.
4. Screw electrode into threads or flange provided on vesssel (see Fig. 3) and tighten
with a 41 mm open-end spanner. The torque required when cold is 160 Nm.
5. Provide a max. thermal insulation of boiler of 40 mm at electrode (see Fig. 2).
D E
Attention
Do not subject the electrode tips to shocks and do not bend the electrode
tips when mounting.
Use only joint ring Ø 33x 39 DIN 7603 made from 1.4301 E8P. Do not in-
sulate the threads with hemp or PTFE tape!
Do not lag the electrode body above the hexgonal part.
The electrode must only be installed in a vertical position.
The specified torques must be strictly observed.
D
Note
For the approval of the boiler standpipe (see Fig. 3) the relevant regulations
must be considered.
Carry out the installation work in compliance with the installation examples
given in this installation manual.