IM-P537-01
EMM Issue 1
28
Pressurised Thermophysical deaerator with operator manual for the control unit
For the correct execution of the unit commissioning operations, it is recommended to use the support and
specific skills of a Spirax Sarco technician, available to you by contacting our Service department
Check the following before starting the deaerator:
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The sealing of the boiler feedwater pumps must be suitable for the thermophysical deaerator operating
temperature.
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The NPSH value of the boiler feedwater pumps, to determine the correct height at which the deaerator
should be positioned, in order to avoid pump cavitation phenomenon.
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We recommend maintaining a height of not less than 3 metres.
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The possibility of installing the unit inside the boiler house respecting the above considerations. If the
necessary space is not available, installation on an external structure can be envisaged, taking into
account the weight of the deaerator in operation.
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Check that the condensate has enough pressure to return to the turret.
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Provide room for operation to allow for easy maintenance if not already included in the Spirax Sarco
package, insulate the equipment and all "hot" lines of the unit
4.1 Pre-commissioning inspection (initial start-up)
In most new installations, dirt is inadvertently collected inside the pipes during construction of the pipes
and system installation. It is essential to carefully remove all impurities and residual dirt from inside before
starting the commissioning.
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Ensure that all manual isolation valves (on primary steam, condensate drain, clean steam inlet and
feedwater) are closed.
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Clean the filters upstream of the control valves.
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Ensure that the drain cock of the device is closed.
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Make sure that the unit power supply is disconnected or shut off upstream.
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Check that the design conditions of the primary steam do not exceed that indicated on the unit's
nameplate.
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Check that the make-up water line is pressurised and has been vented.
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Check that the technological (primary) steam line is pressurised and has been drained/vented.
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Check that the pneumatic air line, where required, meets the system requirements.
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Check that the power supply complies with the system requirements.
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Perform a double check to ensure that all connections to steam, condensate and water lines
are correctly made.
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Check that the bolts of the flanged connections are properly tightened.
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Check all electrical connections, both outside and inside the unit, making sure that they comply with the
wiring diagram (see wiring diagram provided with the unit).
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Check the pneumatic air supply of the valve filters/reducers (if provided pneumatically actuated) and
that it complies with the system requirements.
4. Commissioning
