MODULEX EXT 321, 481, 641, 802, 962, 1123 BOILERS
Installation, Operation & Maintenance Manual
OMM-0087_0F
AERCO International, Inc.
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100 Oritani Dr.
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Blauvelt, NY 10913
Page
15
of
146
GF-143
Phone: 800-526-0288
07/13/15
CHAPTER 2:
TECHNICAL FEATURES AND DIMENSIONS
2.1 Modulex EXT Technical Features
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Compact, gas fired, Low NO
x
, condensing boiler.
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Comprised of one sectional boiler body, suitable as a single boiler or in a cascaded group.
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May be installed in either an inside or outside location.
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Low internal water volume.
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Fast response to load variations.
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Flue exhaust outlet positionable on three sides.
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Manifold delivery and return (reversible).
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Made up of two or more heating elements (2 to 7), cast aluminum / silicon / magnesium.
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Full range of modulation by variable speed blowers and premix burners.
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Each heating element monitors its own water temperature, and will individually shutdown
if flow is interrupted, without affecting the other burner sections.
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One gas supply line (reversible).
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Individual modules capable of between 46 and 160.5 kBTU/hr.
These boilers are designed for use with category IV venting.
The boiler is supplied complete with all the safety and control devices in accordance with all
current regulations, and its technical and functional features comply with the regulations
prescribed by:
ANSI Z21.13 / CSA 4.9 - Gas-fired low pressure steam and hot water boilers.
Temperature Control Devices:
2.1.1
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Local NTC sensor (each heating
element)
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Limit thermostat room (each heating
element)
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Flow NTC sensor (General)
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Return NTC sensor (General)
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Safety thermostat approved (manual
reset)
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Flow sensor BCM
Control Panel (E8) Includes:
2.1.2
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ON-OFF switch
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Temperature control / Boiler operation
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Fuses
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High limit sensors
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Air pressure fans
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Condensate level sensor
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Air pressure switch (anti-obstruction)
Other Features Include:
2.1.3
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NTC heat sensors for global temperature control on the flow and return.
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0-10V output to control variable speed primary pump.
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Integral insulation with hypoallergenic synthetic wool.
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Premix fiber mesh modulating burner (premixes into the fan with automatic diaphragm
backflow separation from the combustion chamber).
