18
Important notes
n
One level electrode NRG 1...-11 can be installed together with one GESTRA level
electrode, one level switch or transmitter for water level control and high level alarm
in one single protection tube or level pot (inside diameter 100 mm).
Fig. 16.
If the
NRG 1...-11 is installed inside the vessel, it must be at least 40 mm away from the
upper vent hole.
n
The installation of two level-limiting electrodes NRG 1...-11 in one standpipe is
not
allowed!
n
For the approval of the boiler standpipe observe the relevant regulations.
n
For typical installation examples refer to pages 19 – 20.
n
When mounting the electrode laterally make sure that the inclination angle does not
exceed 45° and that the length of the electrode rod is limited to 1000 mm.
Fig. 17
n
If the electrode is installed outdoor, it
must
be provided with a weather-proof cover
supplied by GESTRA. As an alternative the level electrode can be equipped with a
terminal box made from aluminium.
Tools
n
Open-end spanner A. F. 13, DIN 3110, ISO 3318
n
Open-end spanner A. F. 36, DIN 3110, ISO 3318
n
Open-end spanner A. F. 41, DIN 3110, ISO 3318
n
Scriber
n
Hacksaw
n
Flat file, cut 2, DIN 7261, form A
Installation
– continued –
