GESTRA NRG 16-38 S, Оригинальная инструкция по установке

Страница: 35 / 48

35
Installation
- continued -
EN
NRG 16-38S, NRG 16-39S, step 1
1. Mark low water level on electrode tip
8
and slide locking spring
7
out of the small hole
6
of the
measuring electrode
5
. Also mark the low water level and the level 150 mm above low water
4
also on the protection tube of the level transmitter. Fig. 5, Fig. 6
2. Unscrew electrode tip
8
from measuring electrode
5
and remove the locking spring
7
. Push
electrode tip
8
through spacer disk
a
, remove retaining ring
0
and cut the electrode tip
8
to
length.
3. The electrode tip
8
is covered by a PTFE sleeve. Strip off 150 mm of the PTFE sleeve (dimen-
sion
4
) from the lower end of the electrode tip. Push the new retaining ring from below over the
electrode tip up to the insulation. Leave 20 mm of the upper end of the electrode tip (where the
spring
7
is located) uninsulated. New retaining rings
0
are located in the terminal box of the level-
electrode NRGT 26-1S.
4. If a spacer disk
a
is mounted near dimension
4
, you have to detach the spacer disk from the
protection tube of the level transmitter. Then slide the removed space disk
a
just above the dimen-
sion
4
and screw it into the nearest suitable M4 hole of the protection tube. In order to prevent the
electrode tip
8
from swinging, the protection tube of the level transmitter is provided with M4 holes
every 100 mm starting at 350 mm so that the spacer disks can be attached.
5. Push the electrode tip
8
through the spacer disks
a
, slide spring
7
onto the electrode tip and
firmly screw the electrode tip
5
into the measuring electrode.
Use a 13 mm open-end spanner to hold the measuring electrode
5
. Slide spring
7
along electrode
tip so that its end completely enters the small hole
6
.
6. If the electrode tips
8
of the level electrode NRG 16-39S are longer than the protection tube of the
level electrode NRGT 26-1S (dimension
3
>
2
), slide the spacer disks
a
onto the tips at equal
distances. Note that the spacer disks must only be placed on the insulated part of the electrode tips.
Attention
n
Handle electrode with care. Do not bend electrode tip when mounting and avoid sub-
jecting the electrode to mechanical shocks.
n
Do not lag the outer electrode body and transmitter housing above the mounting flange.
n
Install level electrode only in a vertical position!
n
For the installation of the electrode a protection tube in the steam boiler must be pro-
vided on site, see example of installation of page 16.
NRG 16-38S, NRG 16-39S, step 2
1. Check seating surfaces and place joint ring onto the mounting flange.
2. Put the level electrode onto the mounting flange and tighten bolts in diagonally opposite pairs.