20
9.1 Leakage
Re-tighten corresponding screws in case of leakages.
Replace sealing if necessary and check sealing surface.
Severe burns and scalding’s on the whole body are possible!
Before replacing the sealings, level gauge must be pressureless and
empty!
Leakage
•
In case of leakage, close upper and lower shutoff valve (2, 3) and slowly open drain valve
(4) a little.
•
Fully open drain valve if noise of escaping pressure is no longer audible.
•
Tighten the combination cover/holding screws up to PS=50 bar (7, 13) as well as the
cover screws starting from PS=80 bar (13) in several steps using successively opposite
diagonal (see table chapter 8.1) tightening from top to bottom (see table item 9.6) until
tightening torque
Md
max
is reached.
9.2 Cleaning of mica shields
During first commissioning or re-commissioning of a boiler, oil and grease residues can
deposit on the inside of the mica shields.
In such cases:
•
Close shutoff valves (2, 3).
•
Open drain valve (4). Wait until temperature and pressure are back to ambient.
•
Remove plug (5, 15) and clean mica shields as well as channel inside of the
indicator body with a circular brush.
Danger
