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Need help?Do you have a question about the Aerco Modulex MLX-303 and is the answer not in the manual?
Explains DANGER, WARNING, CAUTION symbols, and key safety instructions.
Overview of the Modulex boiler's modular design, efficiency, and components.
Lists compliance standards and installation flexibility options.
Provides physical dimensions and weight specifications for models.
Presents detailed technical specifications, input/output ratings, and electrical requirements.
Explains the boiler's built-in freeze protection mechanism and requirements.
Outlines installation requirements, codes, and important notes for installers.
Detailed steps for unpacking the boiler and checking its contents.
Specifies ideal boiler location, minimum clearances, and pad requirements.
Details the various connection points for water, gas, and venting.
Explains the information presented on the boiler's data plate.
Discusses vent pipe connection types, categories, and installation codes.
Provides guidance on venting installation, sizing, and Massachusetts requirements.
Outlines procedures for removing an existing boiler from a common venting system.
Stresses the importance of water quality and treatment per guidelines.
States the maximum and minimum working pressure limits for the boiler.
Describes the CSD-1 manifold assembly components and supply/return piping.
Covers procedures for filling, draining the system, and condensate drain installation.
Details electrical requirements, connections, grounding, and safety precautions.
Explains wiring for DHW storage tank connections and sensor installation.
Introduces boiler operation principles, modules, and temperature monitoring.
Explains how the boiler achieves efficiency through modular operation and modulation.
Describes the step-by-step process of the ignition sequence.
Details operation modes like Indoor/Outdoor Reset, Remote Set-Point, and Constant Set-Point.
Covers essential steps for initial startup, including tool requirements and gas checks.
Provides detailed steps for performing combustion calibration and adjustments.
Instructions for reassembling the unit after calibration procedures.
Explains the importance and necessity of periodic safety device testing.
Guides on how to display, correct, and clear fault codes from the controller.
Procedure to test the low gas pressure fault detection system.
Details methods for testing the low water level safety switch.
Steps to simulate and test the high water temperature safety shutoff.
Procedures for testing flame detection during ignition and running modes.
Instructions for testing the safety pressure relief valve per ASME code.
Introduces available maintenance kits for annual and fireside inspections.
Lists required and recommended tasks for annual boiler maintenance.
Guides for performing a fireside inspection, including disassembly and cleaning.
Instructions for disassembly and replacement of burner sections.
Procedures for final testing and returning the boiler to service after maintenance.
Explains the guide's purpose and how to use fault indication tables.
Comprehensive table detailing error codes, potential causes, and solutions.
Discusses metal reactions, scale, corrosion, and water chemistry principles.
Details parameters for testing and maintaining water quality in the system.
Provides guidelines for flushing, cleaning, and treating the heating system water.
Links water quality maintenance to boiler warranty coverage.
Covers analysis scheduling and resources for hydronic water treatment.
General