Igema NA7-130, Инструкция по установке и эксплуатации

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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 10.2) 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 sketches 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
80-130 60 90 120 150 180 200
Tightening torques of screw plug (6) Md=
150 Nm
Danger
Danger