GESTRA NRG 211-1, Оригинальная инструкция по установке

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Note
n
If the level electrode is removed for inspection work make sure it is stored in a
vertical position.
Danger
When loosening the level electrode steam or hot water might escape!
This presents the risk of severe scalding all over the body!
It is therefore essential not to dismantle the electrode unless the boiler pressure is
verified to be 0 bar.
The level electrode becomes hot during operation.
Risk of severe burns to hands and arms.
Before carrying out installation and maintenance work make sure that the equipment is
cold.
The equipment must only be installed, wired and commissioned by qualified and competent staff.
Retrofitting and maintenance work must only be performed by qualified staff who - through adequate
training - have achieved a recognised level of competence.
Maintenance
Safety note
After two years at the latest check the ceramic insulator of the measuring electrode
7
for cracks.
To do so you have to remove the electrode. The equipment may only be installed and removed by quali-
fied personnel.
Loosen the retaining ring for the strainer
7
Fig. 2 and remove the strainer. If there are visible signs of
cracks in the insulator replace the level electrode with a new one.
If you cannot detect any cracks put the strainer
7
back in place and secure it by means of the retaining
ring. Re-install the electrode. Observe the note in chapter "Installation" on page 9.
Checking ceramic insulator
Removing and disposing of the level electrode
Removing and disposing of level electrode NRG 211
1. Switch off supply voltage.
2. Turn up the retaining bracket
e
and detach the upper part of the connector
i
from the level
electrode. Fig. 4
2. Before removing the equipment make sure that it is neither hot nor under pressure.
For the disposal of the equipment observe the pertinent legal regulations concerning waste disposal.
If faults occur that are not listed above or cannot be corrected, please contact our service centre or
authorized agency in your country.