GESTRA NRGT 26-1, Руководство по установке

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3
Attention
■
The seating surfaces of the threads or flange provided on the vessel or boiler standpipe
must be accurately machined. Fig. 6
■
Do not bend electrode rod when mounting.
■
Do not lag electrode body.
■
Do not insulate electrode thread with hemp or PTFE tape.
Installation
NRGT 261
. Check seating surfaces of threads or flange provided on vessel or boiler standpipe. Fig. 6
2. Place joint ring
C
onto seating surface
B
of the electrode
Fig. 7.
Use only joint ring (of stainless steel .430) D 27 x 32 to DIN 7603 supplied with electrode.
3. Apply a light smear of silicone grease (e. g. DOW Corning Compound) to electrode thread
A .
4. 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
160 Nm
when cold.
NRGT 261S
. Check seating surfaces and place flat gasket on connection standpipe.
2. Place flange
E together with level electrode onto connection standpipe and secure with bolts.
Tighten bolts in diagonally opposite pairs. Fig. 5
Note
■
For the approval of the boiler standpipe with connecting flange the relevant local or
national regulations must be considered.
■
See four examples of installation on page 4.
Tools
■
Open-end spanner 7 mm A. F.
■
Open-end spanner 4 mm A. F.