SmartPlate Application Guide for Boiler Interface
SP-1010
Technical Application Guide
TAG-0026_0B
01/08/2016 AERCO International, Inc.
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100 Oritani Dr.
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Blauvelt, New York 10913
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Phone: 800-526-0288
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Some thermal mass must be added as a buffer to dampen fast transitions and minimize boiler
cycling, which occurs either during zero loads or during low load conditions in which the only
load is generated by recirculation piping losses.
AERCO has provided your local sales representative with two sizing programs to calculate the
thermal buffer tank volume required to reduce boiler cycling – one for use with AERCO boilers,
and another for use with non - AERCO boilers.
The AERCO boiler buffer tank sizing program requires the following inputs:
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AERCO boiler model number.
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Quantity of boilers.
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Boiler maximum supply temperature to SmartPlate.
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SmartPlate setpoint temperature.
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SmartPlate model number.
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Quantity of SmartPlates.
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Domestic hot water building design load.
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Building or Application Type. Choices include: elementary school, high school, hospital,
hotel, laundry, process, office building, prison, residential apartment, restaurant,
university building, and university dorm.
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Pipe diameter and length to calculate piping volume.
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Minimum flow per AERCO boiler.
The buffer tank should be vertical to promote natural stratification. Benchmark can be installed
with a two connection or a four connection buffer tank. For the two connection buffer tank, the
boiler water return from the SmartPlates should be located in the lower quarter of the tank and
the outlet to the boilers should be located in the upper quarter of the tank. Modulex should be
installed with a 4 connection buffer tank. The hot water inlet from the boilers and outlet to the
system loop should be located in the upper quarter of the tank, and the boiler water return from
the system and to the boilers should be located in the lower quarter of the tank.
The system should be piped in one of four arrangements, depending on your system design
requirements and the AERCO boiler specified.
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Figure 4 shows the buffer tank and SmartPlate heaters piped as a zone with the
Benchmark boilers and the heating system.
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Figure 5 shows the buffer tank and SmartPlate heaters, piped as a zone with the
Benchmark boilers and the heating system, and a separate zone, or summer pump. In
this arrangement the system pump supplies the buffer tank/SmartPlate zone during the
heating season. When the heating season ends, the system pump can be shut down
and the zone will be serviced by the separate summer pump to conserve energy.
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Figure 6 shows the buffer tank and SmartPlate heaters piped with Benchmark boilers
dedicated solely to domestic water heating.
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Figure 7 shows the 4 - port buffer tank and SmartPlate heaters piped with Modulex
boilers. The location of connections on the 4 - port buffer tank, and natural stratification
will ensure that the hot outlet water for the boilers will pass through to the system and
the colder return water will pass through back to the boilers and allow condensing.
