AERCO Innovation (G-10-1350 to G-11-0563) - Manual (Page 68)

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Innovation Series Water Heaters Chapter 6
OMM-0079_0B USER MANUAL Maintenance
Page 68 of 200 AERCO International, Inc. · 100 Oritani Dr. · Blauvelt, NY 10913 · Ph.: 800-526-0288
07/21/11
Figure 6-8. Sample Heat Exchanger Cleaning Set-Up
6.8.2 Cleaning Procedure
1. Slowly add the prescribe amount of the Hydroskrub solution to the circulating bucket.
2. Open the drain valve, outlet hose connection valve and turn on the pump. Periodically check for leaks
and maintain the liquid level in the bucket. A lowering volume level is an indication that there is an
open drain in the system.
3. Check the cleaning circuit to ensure that the HydroSkrub solution is flowing from the circulation bucket,
through the pump and the heater and back to the top of the top of the bucket.
4. Return discharge foaming indicates an active HydroSkrub solution and the presence of mineral
deposits in the equipment.
5. Additional HydroSkrub and/or water may be required to maintain circulation and to prevent the pump
from cavitating.
6. Circulate the cleaning solution through the heat exchanger and piping for 1 to 3 hours. Estimate the
circulation period based on the time in service and water hardness. When the foaming action stops,
HydroSkrub strength is depleted (two pounds of deposits removed per gallon used) or the equipment
is free from calcium and other water-formed mineral deposits.
7. Periodically test the solution for effectiveness to determine if more HydroSkrub is needed. Refer to
“Testing HydroSkrub Effectiveness” in the next paragraph for details. If the cleaning solution is
expended before circulation time is up, additional HydroSkrub will be needed and circulation time may
be extended to complete the cleaning.
8. Upon completion of the cleaning process, begin flushing the solution by adding clean water to the
circulation bucket, then disconnect the return valve and hose connection from the top of the circulating
bucket and thoroughly flush. Continue water flushing the equipment for a minimum of 10 minutes or
until discharge runs clear.