Publicidad
DEUTSCH
Es darf nur der von uns beigelegte
Dichtring D 27 x 32 DIN 7603-1.4301
verwendet werden!
3. Elektrodengewinde
mit einer geringen
I
Menge Siliconfett bestreichen (DOW Cor-
ning 111 Compound).
4. Niveauelektrode in Flanschdeckel ein-
schrauben und mit 36er Ring- oder Maul-
schlüssel festziehen. Das Anzugsmoment
beträgt im kalten Zustand 160 Nm.
Hinweise
Die Dichtflächen am Flanschdeckel müssen
gemäß Fig. 9 technisch einwandfrei bear-
beitet sein!
Elektrodengehäuse nicht in die Wärmeiso-
lierung des Kessels einbeziehen.
Die
Prüfung
des
Kesselstutzens
Anschlußflansch muß im Rahmen der Kes-
selvorprüfung durchgeführt werden!
ENGLISH
Important Safety Note
The level electrodes types NRG 16-12, NRG
17-12 and NRG 19-12 are suited as high-
water level limiters only in combination with
GESTRA level switch NRS 1-8.
The electrode must only be installed by
qualified staff.
Qualified staff are persons who - through
adequate training in electrical engineering,
the use and application of safety equipment
in accordance with regulations concerning
electrical safety systems, and first aid &
accident prevention - have achieved a
recognised level of competence appropriate
to the installation and commissioning of this
critical safety device.
Danger
When loosening the flanged connection of
the electrode live steam or hot water might
escape.
This presents the danger of severe injury.
It is therefore essential not to dismantle the
electrode unless the boiler pressure is
verified to be zero.
Purpose
Self-monitoring high-water level alarm with
periodic self-checking with the two-channel
level switch type NRS 1-8 acc. to TRD 604
(steam
boiler
plants
operating
constant supervision). The combination is
used to detect water rising to the highest
permissible level in steam and pressurized
hot-water plants.
Type-Approval No.
09 · 91-0112
Der Neigungswinkel für die Elektrode darf
maximal 45° betragen! Fig. 4
Bei geneigtem Einbau darf das Maß „L"
Fig. 4 maximal 1000 mm betragen!
Elektrischer Anschluß
Die
Elektrodenzuleitung
schirmtes, vieradriges Kabel, z. B. I-Y(St)Y
2 x 2 x 0,8 oder LIYCY 4 x 0,5 mm
Länge max. 100 m bei Leitfähigkeit ab
10 µS/cm.
Länge max. 30 m bei Leitfähigkeit ab
0,5 µS/cm.
Länge max. 15 m bei Leitfähigkeit ab
0,5 µS/cm und Einsatz des Zusatzgerätes
URN 1 (24V DC).
mit
Belegen Sie den Anschlußstecker
Anschlußplan Fig. 10 für NRS 1-8b oder
Fig. 11 für NRS 1-8c.
Design
NRG 16-12: Screwed connection 3/4˝ BSP
3
(G
/
to ISO 228), PN 40
4
NRG 16-12.1 and NRG 16-12.2: With flange
PN 40 supplied separately.
NRG 17-12: Screwed connection 3/4" BSP
(G 3/4˝ to ISO 228), PN 63.
NRG 17-12.1 and NRG 17-12.2: With flange
PN 63 supplied separately.
NRG 19-12: Screwed connection 3/4˝ BSP
(G 3/4˝ to ISO 228), PN 160.
NRG 19-12.1 and NRG 19-12.2: With flange
PN 160 supplied separately.
NRG 16-34: Combination electrode consis-
ting of an electrode type NRG 16-12 and an
electrode type NRG 16-11 with PN 40 flange
supplied separately.
NRG 17-34: Combination electrode consis-
ting of an electrode type NRG 17-12 and an
electrode type NRG 17-11 with PN 63 flange
supplied separately.
NRG 19-34: Combination electrode consis-
ting of an electrode type NRG 19-12 and an
electrode type NRG 19-11 with PN 160
flange supplied separately.
Notice
Do not screw electrode directly into a small
screwed socket. This may have a detrimental
effect on the safety function of the high-
water level alarm (see Fig. 8).
Avoid
subjecting
without
mechanical shocks or bending as this might
cause damage to the electrode seal.
Installation of Electrode
Step 1
1. Screw electrode tip
electrode
A
. Fig. 5.
Hinweis
Für Frankreich gilt der Schaltplan Fig. 12!
Achten Sie auf die Angaben im Gehäuse des
zugehörigen Niveauschalters.
Zugehöriger Niveauschalter
erfordert
abge-
Niveauschalter NRS 1-8. Zweifach redundan-
ter Begrenzer mit periodischem Selbsttest
2
.
nach DIN 57116/VDE 0116.
Zusatzbaustein
GESTRA
Abschlammüberwachung für den Fall, daß
gemäß
H
die Niveauelektrode in ein außenliegendes
Meßgefäß installiert wird. Fig. 3
2. Carefully determine required measuring
3. Mark length of electrode tip
4. Unscrew electrode tip
5. Screw electrode tip
6. If
Step 2
1. Check seating surfaces, Fig. 9.
2. Place ring joint
3. Apply a light smear of silicone grease
4. Screw level electrode into threads of
the
electrode
tip
to
Important Notes
D
into measuring
Überwachungslogik
length.
D
D
from measuring
electrode
A
and cut tip.
D
into measuring
electrode
A
and tighten. Slide spring
along electrode tip
D
, so that its bent end
completely enters into small bore
a
measuring-surface
required slip sleeve
onto electrode tip
E
ensuring
that
the
electrode
D
protrudes 2 mm from sleeve. Fasten
sleeve with screw
. Push star-lock
G
washer
over electrode tip against
F
sleeve.
onto seating surface
K
of electrode, Fig. 6: NRG 16-12, NRG 17-
12, Fig. 7: NRG 19-12.
Note: Use only ring joint (of stainless
steel 1.4301) D 27 x 32 to DIN 7603
supplied with electrode.
(DOW
Corning
111
Compound)
electrode thread
.
I
flange provided on vessel and tighten with
a 36 mm ring spanner. The torque required
is 160 Nm when cold.
The seating surfaces of the flange provi-
ded on the vessel must be accurately
machined. Fig. 9.
Do not bend electrode tip when mounting.
Do not lag electrode body above the hexa-
gonal section.
For the approval of the boiler standpipe
the relevant regulations must be considered.
SRL
6.
.
C
B
.
extension
is
tip
J
to
Publicidad
