Vahterus Plate - Page 17

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4. Start up the pump.
5. Slowly open the inlet valve according to the instructions.
6. Close the vent valve when all the air has been removed from the system.
7. Begin the actual start-up procedure.
Aftertheventingprocedure,pleasechecktheadditionalinformationfordierentunits.
Steam condenser with steam side control:
Beaware: If thecoldside ow is turned fullyon beforeopening the steamvalve, the
steam side start-up will lead to a vacuum condition when starting up.
1. Partly open the cooling water side. All valves must be opened gradually to prevent
thermal shocks to the heat exchanger.
2. Check that the heat exchanger and steam lines are empty of condensate if the sys-
tem is steam side controlled. The condensate outlet pipe also needs to be empty of
condensate. To ensure a safe start-up, good condensate level control in the system
is recommended.
3. Open the steam valve gradually, allowing condensing to start. The temperature
increase must be done step by step, max. 20°C/step , and then allowed to stablise
(the temperature increasing rate at start-up is max. 5°C/minute). The temperature
is raised by increasing steam pressure.
4. Iftheunitiscold(below0°C),thecorrectheatingrateis100°C/hourfortherst
100°C. After that, the temperature increasing rate is max. 5°/minute.
5. Full capacity is reached by opening both sides gradually to full open position.
Steam condenser with condensate side control:
1. Thesteamsidemustbelledwithwaterwhenstartinguptheunit.
2. Check that the steam lines are empty of condensate.
3. Partly open the cooling water side. Valves must be opened gradually to prevent
thermal shocks to the heat exchanger.
4. Open the steam condensate valve gradually, allowing condensing to start. The
temperature increase must be done step by step, max. 20°C/step and then al-
lowed to stabilise (the temperature increasing rate at start-up is max. 5°C/minute).
The temperature is raised by increasing pressure. The steam side pressure must
always be lower than the cooling side pressure. (Figure 1 and 2)
5. Iftheunitiscold(below0°C),thecorrectheatingrateis100°C/hourfortherst
100°C. After that, the temperature increasing rate is max. 5°/minute.
ATTENTION!
¬ It is not possible to measure the condensate level when the steam condenser is
operated with condensate side control.
¬ In condensate controlled units, the capacity is controlled by controlling the conden-
sate level inside the unit according to the cold side outlet temperature. Condensate
temperature cannot be used to control the condensate level inside the unit.