AERCO Innovation (G-14-2265 and above) - Manual (Page 89)

Innovation Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 6 – MAINTENANCE
OMM-0078_0L
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Page 89 of
206
GF-128
Phone: 800-526-0288
PRI: 11/25/2014
6.8.2 Cleaning Procedure
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 section 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.
9. HydroSkrub is biodegradable, and in most instances may be purged down sewers. Check
with local authorities before disposing of any complex compositions
10. Turn off water, shut off the pump and immediately close discharge valves to prevent
backflow.
11. Completely drain pump bucket. Disconnect the hoses from equipment and thoroughly rinse
the bucket, pump, and associated hoses used.
6.8.3 Testing HydroSkrub Effectiveness
There are two methods of testing the effectiveness of HydroSkrub during cleaning: the calcium
carbonate spot test of the circulating solution and the charting of a trend in the pH of the cleaning
solution.