AERCO SmartPlate - Manual (Page 66)

SmartPlate Installation, Operation & Maintenance Manual
CHAPTER 8 – CORRECTIVE MAINTENANCE
Page 66 of 138 AERCO International, Inc.  100 Oritani Dr.  Blauvelt, NY 10913 OMM-0069_0E
PRI: 11/26/2013 Phone: 800-526-0288 SP-100
10. Table 8-2 lists the recommended cleaning methods for the type of Heat Exchanger fouling
encountered.
Table 8-2. Recommended Cleaning Procedures
TYPE OF
FOULING CAUSE CLEANING METHOD
CHEMICAL
CLEANING NOTES
Incrustation
Scaling
(Lime
Deposits) Calcium
Carbonate,
Calcium
Sulphate,
Silicates 1. Soft brush & running water
NOTE: Avoid Gasket
Damage
2. High pressure hose.
3. Chemical cleaning
Nitric Acid
Sulfamic Acid
Citric Acid
Phosphoric Acid
Complex Agents
(EDTA, NTA)
Sodium Poly-
phosphates Maximum
concentration:
4%
Max. Temp:
140°F
Sediment Corrosion
Products
Metal
Oxides
Silt
Alumina
1. Soft brush & running water
NOTE: Avoid Gasket
Damage
2. High pressure hose.
3. Chemical cleaning
4. Addition of surfactants can
improve cleaning effect
Nitric Acid
Sulfamic Acid
Citric Acid
Phosphoric Acid
Complex Agents
(EDTA, NTA)
Sodium Poly-
phosphates Maximum
concentration:
8%
Max. Temp:
140°F
11. Upon completion of the cleaning process, reinstall all plates and gaskets and close the Heat
Exchanger using the procedure in paragraph 8.7.3.
8.7 DOUBLE-WALL HEAT EXCHANGER OPENING AND CLOSING
The following paragraphs provide the instructions to open the Double-Wall Heat Exchanger,
remove/replace channel plates and close the Heat Exchanger.
WARNING
THE UNIT MUST BE SHUT DOWN AND DRAINED PRIOR TO
PERFORMING THE PROCEDURES DESCRIBED IN
PARAGRAPHS 8.7.1 THROUGH 8.7.3 WHICH FOLLOW.
8.7.1 OPENING HEAT EXCHANGER
Perform the following steps to shut down, drain and open the Double-Wall Heat exchanger:
1. Ensure that the SmartPlate Heater has been shut down and drained using the procedures
in paragraph 8.6.1, steps 1 through 7.