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AM Series Boiler & Water Heater User Manual
CHAPTER 2: FUNCTIONAL OVERVIEW
2.2 Intended Use – Boilers
The gas-fired condensing AM Series boilers are designed to be used in central heating
systems. Any other use is prohibited.
Heat is always guaranteed for the production of domestic hot water since it is given priority
over space heating demands. Follow the specific procedure in Section 9.7 for boiler
adjustment for domestic hot water temperature. This boiler can be connected to an indirect
storage tank for the production of domestic hot water (Section 4.10).
This unit can be installed with a direct venting system or with a one pipe vent system and
draw combustion air from the room.
The quality of the system water is very important. Poor water quality can damage
heating systems and boilers due to scale formation and corrosion.
A heating system can be configured to function at a temperature range of between 68°F (20°C)
and 180°F (82°C).
The AM Series boiler can be connected to a room On/Off control (Section 5.2.1).
An outdoor air temperature sensor must also be connected to the boiler for an outdoor reset
supply temperature control for maximum fuel efficiency and comfort. For further information on
the outdoor-air reset, refer to Section 9.10.
2.3 Intended Use – Water Heaters
The gas fired condensing AM Series water heaters are designed to be used for domestic hot
water production. Any other use is prohibited.
The water heaters must be connected to a storage tank for the production of domestic hot
water. When connecting the water heater to the storage water heater, the installer must
consider the head loss of the water heater (see figure 4-4), the head loss of the piping system
and the head loss of the storage water heater to size adequate pumps.
This unit can be installed with a direct venting system or with a one pipe vent system and draw
combustion air from the room.
The quality of the system water is very important. Poor water quality can damage heating
systems and boilers due to scale formation and corrosion.
2.4 Intended Use – Water Heaters and Boilers with AMR Option
This option is available for AERCO AM Series water heaters and boilers. All functional
descriptions that apply to AM water heaters and boilers apply to the AMR option, except where
specifically noted.
The AMR option reduces thermal loss by using a pump to efficiently recirculate a mix of building
recirculated water (if used on site), fresh potable water, and water in the lower portion of the
tank for heating in the heat exchanger. A functional diagram may be found at the end of this
chapter.
OMM-0100_E • GF-146 • 11/15/2019
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
Page 12 of 170
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