Clayton Steam Generator model EO-100-1M
PAGE 18 / 70
Instruction Manual, doc.nr.: MAN18206 Rev A PSC
CHAPTER 5 :
INITIAL FIRING.
5.1
BEFORE FIRING
Every steam generator is thoroughly tested and all adjustments are correctly made under actual operating
conditions before shipment from the factory. Rough handling in shipment may cause loosening of plumbing
connections or change some of the adjustments. It is recommended that the following procedure be carried
out before initial starting to ensure satisfactory operation.
•
Visually inspect and tighten any loose plumbing connections and make sure plant has been installed in
accordance with installation manual
(ref 191.076)
, regarding fuel system, exhaust systems, etc...
•
Check rotation direction of the blower. This can be checked by removing the inspection cover on the
air inlet duct.
•
Verify that all fuel lines are open and fuel circulation through the burner circuit is present. If operated
without fuel, the fuel pump will quickly score and be damaged. When initially starting, disconnect
return line to check flow and thus be sure that fuel is circulating.
•
Suitable watertreatment equipment should be installed before steam generator is placed in service.
Adequate water treatment MUST be used from the time the generator is first operated.
It is
IMPORTANT
that the coil overheating protection be tested after the generator has been initially started
and brought up to operating steam pressure. The sensor
( thermocouple or PT-100 )
should be tested
periodically to ensure continuous protection.
•
After proper firing rate has been established, check coil feed pressure at high fire. Record steam
pressure and coil feed pressure for future reference.
5.2
CONDITIONING OF NEW INSTALLATIONS OR INSTALLATIONS WITH A NEW COIL
5.2.1
PURPOSE
To remove residual mill scale, metal shavings, oils and other contamination captured within the heating coil
& feedwater system during installation of the steam generator, its ancillary equipment, and the feedwater
system. It is essential to “boiled out” the plant prior to full commissioning of the generator to prevent
deposits from attaching themselves to the coil tube wall.
5.2.2
STEP 1
•
Flush out the hotwell and steam generator system, using soft water.
•
Thoroughly dissolve 5 kg
(10 lbs)
of commercial tri-sodium phosphate
(Na
3
PO
4
.10H
2
O)
or 2,5 kg
(5
lbs)
pure
(anhydrous)
tri-sodium phosphate
(Na
3
PO
4
)
in softened water in a separate container per m³
(250
gallons)
water. Ratio amounts listed above based on the volume required to fill the applicable
coil, separator, and receiver tank being installed.
•
In order to ease the dissolving of the product, it is strongly recommended to use hot softened water at
or above 60°C
(140°F)
•
Add the tri-sodium phosphate mixture to the receiver.
•
Operate the steam generator & feedwater system
(plant)
for at least one hour.
•
Blowdown the plant.
