General Boiler Operation - Watts AERCO Modulex EXT Commercial Series User Manual

Modulex EXT Commercial Series Boilers User Manual
CHAPTER 3: Technical Features & Dimensions
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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.
•
Operation modes:
o Ability to control power to the individual heating elements for any calibration with or
without confidential code access.
o Production of A.C.S. (Active Cooling System) by NTC sensor of priorities for control by
boiler feed pump or by three-way diverter valve controller.
•
E8 electronic controller included.
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BCM (Boiler Communication Module) included.
•
Ability to control power of the individual heating elements.
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Control of heat demand: constant or remote setpoint.
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Monitoring of operating status and temperature.
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Reporting of alarms.
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Setting of parameters.
•
Emergency operation prevents the boiler from shutting down as a result of the interruption of
communication with a control system or any remote control unit.
•
Alarm management.
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Alarm reset input.
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Warning alarm relay.
•
Stainless steel condensate collector tank with siphon, drain trap, and smoke chamber.
•
Easily removable stainless steel panels painted for outdoor installation.
•
Built-in air vent

3.2 GENERAL BOILER OPERATION

The boiler may be operated from the E8 controller or alternatively from a BCM (Boiler Cascade
Manager). The boiler management logic automatically fires the maximum number of
simultaneously operating heating elements in order to maximize heat production and overall
efficiency. Burner efficiency and a high heat exchange between surfaces contribute to the
reliable and efficient output power. The various components are designed to work together so
that operating time is shared equally among the components, thus reducing maintenance and
labor costs.
The hot water moved by the pump is pushed to the return of the primary flow of the hydraulic
separator. From here a second pump will distribute the hot water to the various destinations.
The cooled return water is drawn by the pump through the hydraulic separator to resume the
cycle via the boiler.
WARNING!
If installing to an outdoor location where freezing temperatures may occur, it is necessary
to install devices and/or materials to prevent any freezing in the condensate drain and the
Flow and Return manifolds. Failure to do so may cause serious damage to the
equipment.
Page 20 of 144
09/15/2017
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
OMM-0095_0H
GF-139