AERCO AM Series Boiler User Manual - Manual (Page 35)

AM Series Boilers and Water Heaters
CHAPTER 3 – INSTALLATION
OMM-0100_0B AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 35 of 156
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Ph.: 800-526-0288 PRI - 07/14/14
3.11.1 Water Quality - Boilers
• Before connecting the boiler to the heating system, the heating system must be thoroughly
flushed to remove sediment, flux, filings and other foreign matter. The heat exchanger can
be damaged by build-up of corrosion due to sediment.
• An approved inhibitor should be added to the heating system water to prevent limestone and
magnetite deposits from forming and to protect the boiler from galvanic corrosion.
• The manufacturer cannot be held responsible for any damage caused by incorrect use of
additives in the heating system.
• The heating system must be designed so that no piping or radiation elements are higher
than 490 feet or else the hydraulic head of the system will cause the relief valve to open.
• Continual fresh make-up water will reduce boiler life. Mineral buildup in the heat exchanger
reduces heat transfer, overheats the stainless steel heat exchanger, and causes failure.
Addition of oxygen carried in by makeup water can cause internal corrosion in system
components. Leaks in boiler or piping must be repaired at once to prevent makeup water
entering the boiler.
• This boiler can supply heating water at a temperature up to 203°F (95°C) (setup of the
safety high limit thermostat) and pressure of 160 PSI. If the heating system is built with
materials not able to resist to this temperature and pressure, you must install a device that
shuts off the boiler before the material’s limit temperature and pressure.
• There is a risk of system damage due to unsuitable heating system water. If oxygen-
per
meable pipes are used, e.g. for under floor heating systems, the systems must be
separated from one another by plate heat exchangers able to resist to the corrosion.
Unsuitable heating system water promotes sludge and corrosion formation. This can result
in boiler damage and malfunction.
• Do not use the boiler to directly heat domestic hot water, swimming pool, or spa water.
3.11.2 System Piping Methods - Boilers
This boiler is designed to function in a closed loop pressurized system not less than 15 psi (1
bar). A pressure gauge is included to monitor system pressure. Each boiler installation must
have an air elimination device, which will remove air from the system. Install the boiler so the
gas ignition system components are protected from water (dripping, spraying, etc.), during
appliance operation for basic service of circulator replacement, valves, and others.
3.11.3 Freeze Protection - Boilers
Freeze protection for new or existing systems must use glycol that is specially formulated for
this purpose. This includes inhibitors, which prevent the glycol from attacking the metallic
system components. Make cer
tain to check that the system fluid is correct for the glycol
concentration and inhibitor level. The system should be tested at least once a year and as
recommended by the producer of the glycol solution. Allowance should be made for the
expansion of the glycol solution in the system piping.