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134 Cooling and heating
13. Repeat steps 10…12 a few times until all air is let out of the cooling circuit. Listen for a
humming sound and/or feel the piping for vibration to find out if there is still air left in
the circuit.
Adjustments
•
Set the base pressure to 100…150 kPa by draining coolant from the fill/drain coupling.
•
Control the coolant temperature so that it stays between the limits stated in
on page
.
Draining the internal cooling circuit
You can drain the internal cooling circuit through the cooling unit as follows:
Note:
Draining coolant into the sewer system is not allowed.
WARNING!
High-pressure hot coolant may be present in the internal cooling
circuit. No work on the cooling circuit is allowed until the pressure is lowered down
by stopping the pumps and draining coolant.
1. Lead the bleed hose into a bucket or other suitable container. Extend the standard
hoses when necessary.
2. Open the bleed valve to let air displace the liquid.
3. If required, dry the piping with compressed oil-free air of less than 6 bar (600 kPa).
4. If the converter is to be stored in temperatures below 0 °C (32 °F),
•
dry the cooling circuit with air
•
fill the cooling circuit with a mixture of water and coolant according to section
Freeze protection and corrosion inhibition
on page
•
drain the cooling circuit again.
Cooling station control
Instructions for liquid cooling control:
1. After the transportation package is opened
a. The converter must be stored in non-condensing environment.
2. During turbine installation - before converter hot-commissioning (no electrical running
performed yet). The converter must be protected against direct climate changes, such
as rain and sunlight (temperature cover).
a. Remove the temperature cover.
b. Visual inspection - no condensation water inside the converter can be found. The
converter doors must be closed after visual inspection.
c. Start cooling liquid circulation. Forced heating must be enabled in all conditions. Set
the cooling system target temperature to +45 °C…50 °C (+113 °F…122 °F). Enable
230 V AC supply to the converter.
d. Run the converter for a minimum of 24 hours.
3. After turbine installation - during converter hot-commissioning
a. Follow the product-specific start-up guide.
4. During normal operation
a. Cold start - heating request according to the converter heating demands.
Summary of Contents for ACS880-87LC-4000A/4021A-7
Page 4: ......
Page 10: ...10 ...
Page 17: ...Safety instructions 17 1 3 2 4 5 6 7 ...
Page 18: ...18 Safety instructions 8 9 ...
Page 28: ...28 Introduction to the manual ...
Page 52: ...52 Mechanical installation ...
Page 66: ...66 Planning the electrical installation ...
Page 74: ...74 Electrical installation Diagrams for the customer connections are presented below ...
Page 75: ...Electrical installation 75 optional Fast shutdown ...
Page 85: ...Maintenance 85 b c a Air flow direction 2 3 4 6 ...
Page 87: ...Maintenance 87 2 5 4 ...
Page 88: ...88 Maintenance 7 Arrow indicating the air flow direction 5 6 6 ...
Page 90: ...90 Maintenance Air flow circulation b a ...
Page 106: ...106 Maintenance ...
Page 124: ...124 Control units of the converter ...
Page 126: ...126 Dimension drawings ...
Page 127: ...Dimension drawings 127 ...
Page 128: ...128 Dimension drawings ...
Page 142: ...142 Cooling and heating ...