WIKA BNA - Installing the Float; Commissioning; Heating Jacket Version

EN
001958.03 03/2019 EN/DE
12
Operating instructions bypass level indicator, model BNA
In addition, ensure it has corresponding corrosion resistance.
The bypass level indicator is mounted in a vertical position on the vessel
to be monitored using the process connections (1) provided. Seals
(2), screws (3), washers (4) and nuts (5) suitable for the process
connection must be used for mounting. If necessary, shut-o valves must
be mounted between the vessel and the bypass.
Installingtheoat
■
Clean the oat of anything stuck on it in the area of the oat magnet
system
■
Remove the bottomange(7) and insert the oat(6) into the tube
from the bottom (the marking “top” or a legible model code marks the
top side of the oat)
■
Place the seal (9) onto the bottom ange. Replace the bottom ange
and x it in place using the screws (8)
5.3 Commissioning
If the bypass level indicator is tted with shut-o valves between process
connections and tank, proceed as follows:
■
Close drain and vent ttings on the bypass level indicator
■
Slowlyopentheshut-ovalveat the upper process connection
■
Slowlyopentheshut-ovalve at the lower process connection
As liquid ows into the bypass chamber, the oat rises to the top.
The magnetic system turns the elements of the magnetic display
from “light” to “dark”. The current lling level is shown after liquid
equalisation between the vessel and the bypass level indicator.
■
Always observe the mounting and operating instructions of
accessories before putting them into operation
Bypass level indicator with heating jacket
In this version, the bypass tube is surrounded by a second tube. Heated
liquid or vapour (heat carrier) can ow through this interspace via two
connections. The materials used must be designed for these conditions.
5. Commissioning, operation