I N S T R U C T I O N S
For the installation and maintenance of D C 1 5 2 5 - D C 1 5 5 0
d e s u p e r h e a t e r s
IMI0049E.doc
Rev.0 20/08/14
20090 SEGRATE (MI)- via E.Fermi
EMAIL:
TEL.(02) 269912.1 - FAX.(02) 2692.2452
Page 11 of 16
Fig. 4
The cooling fluid must be clean filtered and must be at constant pressure at all times, as specified in the
order documents. Each liquid supply line must be protected by its own filter with maximum mesh size 50
(mesh 20 acceptable for nozzles from ‘E’ upwards). On request Carraro can supply a supplementary
filter(see fig 3 item 7). The mainly application of Carraro’s filter is to clean cooling liquid from particles
during the start up operations. If no other filter system is installed this filter can be left and periodically
inspected.
As for the process gas pipe, use gaskets and fasteners which comply with the codes of the respective
pipes. The liquid supply line must be free of any trace of liquids which can
solidify If necessary flushing by
appropriate medium bust be provided before connecting the mounting flange of the desuperheater (see
Fig. 3).
After desuperheater is installed a flushing by dry gas nitrogen is strongly recommended to
remove internal moisture.
8.4
START-UP
Make sure that all the components are correctly installed. The supply for the instrumentation air pipes
must be connected as indicated in the instruction manual, together with the filter regulators and valve
positioners. Similarly, calibrate the temperature control unit/transmitter in such a way that it responds
automatically to temperature variations.
Check the liquid pressure in the desuperheater and the operation of the transmitter and temperature
control unit by manually increasing and reducing the output signal and observing the temperatures shown
and recorded. Once there is satisfactory correspondence between the signals sent by the instruments
and the actual temperature, it is possible to set the regulation point and activate the system in automatic
mode.
We recommend to record the characteristics of the vapour (principally temperature) over a sufficiently
long period, in order to check the efficiency of the system and make the necessary adjustments.
9
MAINTENANCE
Maintenance of the desuperheater is extremely simple and does not require specific instruments or
experience. Take extreme care when carrying out maintenance work, especially if using grinding tools ,
compressed air and rotary machinery. In this case the use of protective accessories (goggles, gloves etc.)
is strongly recommended.
