14
)
Flange PN 40, DIN 2501-1
=
For the approval of the boiler standpipe the relevant regulations must be considered.
a
Vent hole
Provide bore as close as possible to the boiler wall!
b
High water HW
c
Electrode rod d = 8 mm
d
Protection tube DN 80
e
Electrode distance ≥ 14 mm (creepage distances and clearances)
f
Low water LW
g
Reducer DIN 2616-2, K-88.9 x 3.2 – 42.4 x 2.6 W
Examples of Installation
– continued –
Key
NRG 16-11S
Electrical connection via four pole connector.
Note that screened four-core cable, e. g. I-Y(St)Y 2 x 2 x 0.8 or LIYCY 4 x 0.5 mm² is required for wiring
the electrode.
Max. length 100 m with conductivites from 10
µ
S/cm.
Max. length 30 m with conductivites from 0.5
µ
S/cm.
Max. length 15 m with conductivites from 0.5
µ
S/cm and application of the ancillary unit URN 1
(24 V DC).
1. Unscrew screw
"
,
Fig. 6
2. Take the terminal box off the level electrode, leaving the sealing element
%
on the contact
plate
&
.
3. Remove cover
§
.
4. Press connecting plate
$
out of the upper part of the terminal box
9
.
The upper part of the terminal box can be turned in steps of 90°.
5. Detach cable gland
(
and cable clamp
/
from the upper part of the terminal box
9
.
6. Run cable through cable gland
(
and upper terminal box
9
and connect the terminals of the
connecting plate
$
according to the wiring diagram.
7. Press connecting plate
$
into the upper part of the terminal box and align the cable.
8. Hold cable with cable clamp
/
and cable gland
(
in position.
9. Mount cover
§
and insert screw
"
.
10. Put upper part of the terminal box onto the level electrode and fix it firmly with screw
"
.
Electrical Connection
