Service Handbook OEB/OES/OGB/OGS
AS/11-2011 2_03_04e_Steam generator draining and rinsing_b
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Noise, Water flowing out of the drain
Notice:
If the pumping circulation is not performed correctly, the unit will go into error
operation via Error code E34. Before that, the pump will attempt through
cyclic work (shaking cycles) to correct the cause of the error (to shake the
pump free).
In order to prevent the drain water temperature that is set in the Service
programme from being exceeded, the steam generator is pumped out in
cycles. Thereby the water will be pumped out to the level of the water level
probe and then afterwards the steam generator will be filled again, until the
steam generator probe B4 the outgoing water temperature setting value on
the controls is registered. Then the steam generator will be completely
emptied.
When the steam generator is empty, water will be repeatedly injected and
pumped out in order to rinse lime from the steam generator (pendulum
rinsing).
If when the automatic steam generator rinsing is being performed and water is
coming out of the unit over flow, this means that either the customer provided
drain is blocked or it is too small.
During the steam generator rinsing process, the condenser cooling process
can also be activated.
Principle outline:
1 = Water level probe
2 = Steam generator
3 = Steam generator probe B4
4 = Pump for steam generator draining
5 = Condenser
6 = Unit drain
7 = Condenser probe B3
8 = Unit over flow
9 = Water inlet Steam generator filling
10 = Ventilation section
11 = Back flow protection with water filling
of steam generator
12 = Steam exhaust vents
Cross reference:
Service Handbook 6.11 "Condenser removal and assembly“
Service Handbook 5. "Trouble shooting and Error Codes Electronic"
Service Handbook 4.2 " Automatic flushing of the steam generator"
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