.Close main isolating valves and completelydrain the unit.
.Fill with water 90% and add Ferrolin8623 10%. .Start heating upto to40
.Solution pH dropsto1–2.
rt circulationand add 0.1% of dispersantin to solution. (P3 Ferrofos8461)
.Circulatethesolutionfor3-6hours minimum and check pH and total iron content frequently. If pH arises drasticly add cleaning chemical until pH reachesto3 –4 again. You may need to repeat this step if pH increase is observed.(oC.P.S. Additiono f chemicals and circulationtime dependson depositin the boiler).If total iron reaches to 8000 ppm, drainthe system and repeat steps2, 3& 4.
.Check the pH, if pH does not increase after adding further fresh solution of Ferrolin8623, the cleaning process is complete and finished.
.Drain cleaning solutionton eutralizationtank of wastetreatment. Drain cleaning solution to neutralizatio ntank of wastetreatment.
1Rinse the system with warm water
.Drainrinsewater
.Fill with water and prepareneutralization solution (causticsoda)up to pH 8.(Alternatively you may use Na3PO4 as 3000 ppm and heat), recirculate about 2-4 hours.
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