Chapter 3: Technical Features & Dimensions; Modulex Ext Commercial Technical Features; Temperature Control Devices; Control Panel (Ufly) Includes - Watts AERCO EXT Installation, Operation & Maintenance Manual

Modulex EXT Commercial Series
CHAPTER 3: Technical Features & Dimensions
CHAPTER 3: TECHNICAL FEATURES & DIMENSIONS

3.1 MODULEX EXT Commercial Technical Features

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Compact, gas fired, Low NO
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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 either an inside or outside location.
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Rated for ambient temperatures of 5 to 104°F (-15° to 40°C).
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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.
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Made up of four or more heating elements (4 to 8), 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.
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Individual modules capable of between 83 and 382.5 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.

3.1.1 Temperature Control Devices:

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Local NTC sensor (each heating element)
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Limit thermostat (each heating element)
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Flow NTC sensor (General)
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Return NTC sensor (General)

3.1.2 Control Panel (Ufly) Includes:

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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

3.1.3 Other Features Include:

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NTC heat sensors for global temperature control on the flow and return.
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0-10 V 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).
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Less than 49 dBA of noise at maximum power.
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Heating operation: instantaneous power microprocessor control, with preset parameters for
comparison between temperature (or calculated from the external temperature regulation) and
global temperature flow.
OMM-0160_A • DRAFT
, condensing boiler.
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Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
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Safety thermostat approved (manual reset)
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Flow sensor BCM
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Air pressure fans
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Condensate level sensor
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Air pressure switch (anti-obstruction)
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