18
If this cleaning was not sufficient, dismount bottom/cover flange (2.3) and remove float (2.1).
Plant must be pressureless for disassembly works!
Wait until unit has cooled!
•
Close shutoff valves (W+D).
•
Open drain valve (A) / plug (6); unit is drained.
•
Caution! When dismounting, residual medium may escape and further evaporation is also
possible.
•
Remove cover flange (2.3).
•
Remove float and clean standpipe and float.
•
Insert float with top-heavy side upwards into standpipe (top-heavy side with colour
marking).
•
Always use new gaskets (2.2) when assembling the unit. Tighten bolts of cover flange /
standpipe in several steps using successively opposite diagonal tightening (see table in
chapter 9.2) until reaching tightening torque Md
max
.
Close shutoff valves before carrying out preservation works or chemical
cleaning of the boiler. Or even better: interrupt passage on flange
connection of boiler nozzles by placing blind flanges.
For commissioning see chapter 9.
Design sketch see chapter 6
10.2 Tightening torques
all.
pressure
PS
[bar]
Tightening torque Md
→
Md
max
[Nm]
in steps
1
2
3
4
5
6
32
35
50
65
75
-
-
50
50
75
100
125
150
165
Tightening torques of screw plug (6) Md=
150 Nm
Danger
Danger
