System Flushing, Treatment, And Cleansing; System Flushing Recommendations - Watts AERCO Modulex EXT Series Technical Application Manual

Modulex EXT Series Piping
BOILER QUALITY AND MAINTENANCE

2.3. SYSTEM FLUSHING, TREATMENT, AND CLEANSING

Note that prior to cleaning the heating system, the boiler MUST be isolated from the piping to prevent
infusion of containments, including sludge, into the boiler. Section 2.3 provides recommendations for
flushing, cleaning, and treating the water used in the Modulex EXT boiler system.
IMPORTANT!
Cleaning solution and inhibitors used must be compatible with heat exchanger material. Corrosion/scale
inhibitor will be ineffective if added to a dirty system; therefore, it is very important to clean the system first.
Water treatments used must be compatible with EPDM gaskets used in the Modulex Boiler. (EPDM =
Ethylene Propylene Diene Manomer).
AERCO recommends the following cleaning solution, inhibitor, and antifreeze products.
www.aerco.com for Product Fact sheet and Material Safety Data Sheets:
• Water Quality Testing — X100 Quick Test Kit
Part number 99152-1
• Corrosion/Scale Inhibitor — Sentinel X100 Liquid Inhibitor
4 x 1 gallon case – part number 99153-2
5 gallon jug – part number 99153-1
• Boiler Noise Reducer — Sentinel X200 Liquid Noise Inhibitor
4 x 1 gallon case – part number 99154-2
5 gallon jug – part number 99154-1
• System Cleaner — Sentinel X300 Liquid System Cleaner
4 x 1 gallon case – part number 99199-2
5 gallon jug – part number 99199-1
• Cleaning solution — Sentinel X400 Liquid System Restorer
4 x 1 gallon case – part number 99155-2
5 gallon jug – part number 99155-1
• Antifreeze — Sentinel X500 Liquid Inhibited Antifreeze
5 gallon jug – part number 99156-1
55 gallon jug – part number 99156-2
275 gallon tote – part number 99156-3
When cleaning, treating, and maintaining, a heating system, consult a qualified professional. The following
are AERCO's tips/guidelines for cleaning a heating system – these do NOT take precedence over detailed
instructions from qualified professionals.

2.3.1. System Flushing Recommendations

• Use an appropriate amount of cleaning solution, carefully following the manufacturer's instructions.
Follow the manufacturer's recommendations when introducing cleaning agents into the system.
• Ensure that the cleaning solution is circulated thoroughly in the system.
• Flush the system thoroughly to remove the maximum amount of contaminants. When emptying the
system, make sure it is done as quickly as possible using all drain off points and ensuring all low lying
pipework is fully drained. Opening all bleed valves ensures the system will be completely emptied.
TAG-0099
Application Guide
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
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Page 7 of 37
10.07.2021