AERCO AM Series Boiler User Manual - Manual (Page 36)

AM Series Boilers and Water Heaters
CHAPTER 3 – INSTALLATION
Page 36 of 156 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0100_0B
PRI - 07/14/14
Ph.: 800-526-0288
GF-146
WARNING!
Never use non-approved additives or toxic boiler treatment
chemicals in the heating system. Any additives introduced into the
heating system must be recognized as safe. Use only inhibited
propylene glycol solutions, which are specifically formulated for
hydronic systems. Ethylene glycol is toxic and can attack gaskets
and seals used in hydronic systems.
3.11.4 Floor Radiant Heating Systems - Boilers
The setting of parameter 3015 in the Factory Menu (see Appendix B) determines the maximum
supply temperature the boiler will maintain. No change to settings made from the control panel
will cause the supply water temperature to exceed the maximum stated in this parameter.
• If glycol is used, it must be used in accordance with the instructions supplied with the
product.
• Any additives added to the heating system must not be added directly inside the boiler but
through the heating system piping to prevent damage to the boiler.
• This boiler is capable of servicing multiple temperature loop systems. It is the responsibility
of the installer to protect the loops with lower temperature requirements from higher
temperatures that may be required by other loops.
• To protect the radiant floor panel against over-heating you must install a safety device that
shuts-off the
boiler before it reaches the floor panel’s limit temperature.
• There is a risk of system damage due to unsuitable heating system water. If oxygen-
permeable pipes are used, e.g. for under floor heating systems, the systems must be
separated from one another by plate heat exchangers. Unsuitable heating system water
promotes sludge and corrosion formation. This can result in boiler damage and malfunction.
3.11.5 Near Boiler Heating Piping Components - Boilers
• Boiler system piping: boiler system piping MUST be properly sized. Reducing the pipe
size can restrict the flow rate through the boiler, causing inadvertent high limit shutdowns
and poor system performance.
• Boiler system pump: Field supplied. The system pump MUST be sized to meet the
specified flow requirements.
• Indirect water heater circulating pump: Field supplied. The pump MUST be sized to meet
the
specified flow requirements. Consult the indirect water heater operating guide to
determine flow characteristics for the selected product used.
• Boiler isolation valves: Field supplied. Full port ball valves are required. Failure to use full
port ball valves c
ould result in a restricted flow rate through the boiler.
• Back flow preventer: Field supplied. Back flow preventer valves are recommended for
installation as shown in Figures 3-10 and 3-11. Failure to install these valves could result in
a reverse flow condition during pump(s) off cycle.
• Domestic indirect hot water isolation valves: Field supplied. Full port ball valves are
required. Failure to use full port ball valves could result in a restricted flow rate through the
boiler.
• Anti-scald mixing valve: Field supplied. If the boiler is connected to an indirect water
heater for domestic hot water, this device MUST be installed.
• Unions: Field supplied. Recommended for unit serviceability.
• Pressure relief valve. See Section 3.11.6