Flowserve NRG 16-42 - Manual (Page 12)

2
Function Function Electrode rod Length [mm]
e.g. High level alarm 
e.g. Feed pump ON 2
e.g. Feed pump OFF 3
e.g. First low-level alarm 4
Attention
■
The seating surfaces of the threads or flange provided on the vessel or boiler standpipe
must be accurately machined. Fig. 4
■ Do not bend electrode rod when mounting.
■
Use only the supplied joint ring D 33x39 (of stainless steel .430) to DIN 7603.
■ Do not lag electrode body.
■
Do not insulate electrode thread with hemp or PTFE tape.
Installation
NRG 16-42
Molykote ®  is a registered trademark of DOW Corning Corp., Midland Michigan, USA
. Determine required measuring lengths of electrode rods and enter data in table “Functions”.
2. Cut electrode rods , , and accordingly,
Fig. 3
3. Deburr faces of electrode tips.
4. Strip off 50 mm of PTFE insulation from the ends of electrode tips.
5. Check seating surfaces of threads or flange provided on vessel or boiler standpipe,
Fig. 4
6. Place joint ring C onto seating surface B of electrode, Fig. 3. Use only joint ring
(of stainless steel .430) D 33 x 39 to DIN 7603 supplied with electrode.
7. Apply a light smear of silicone grease (e. g. Molykote ® ) to electrode thread D.
8. Screw level electrode into threads or flange provided on vessel or boiler standpipe and tighten with a
4 mm open-end spanner. The torque required is 140 Nm when cold.
Please enter data. Please enter data.
Note
■
For the approval of the boiler standpipe with connecting flange the relevant local and
national regulations must be considered.
■ See four examples of installation on page 3.
Tools
■
Open-end spanner 7 mm A. F.
■
Open-end spanner 4 mm A. F.
■
Hacksaw
■
Flat file, medium cut
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