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Explains DANGER, WARNING, CAUTION, and NOTICE symbols used in the manual.
Critical warnings regarding fire, explosion, shock hazards, and keeping the area clear.
Details input, heating capacity, AFUE, and vent diameter for models XEB-2 through XEB-7.
Explains input rating reductions and orifice sizing for high altitude installations.
Illustrates the left, front, and right side views of the boiler with key measurements.
Table listing the width dimension for each XEB model.
Outlines compliance with codes, boiler classification, and protection of components.
Details boiler placement, clearance to combustibles, and base requirements.
Explains methods for providing combustion air per National Fuel Gas Code and local codes.
Provides air infiltration rates for different input capacities and methods.
Guidelines for installing the discharge line from the safety relief valve.
Instructions for installing drain valve, temperature/pressure gauge, and supply/return lines.
Illustrates typical piping for a forced hot water system without zone control.
Shows typical piping for a forced hot water system with zone control valve.
Describes how to pipe the boiler when used with refrigeration systems.
Addresses condensation issues and bypass piping for low temp/high content systems.
Details chimney condition, type, and checks required for safe venting.
Specifies vent pipe types, clearances to combustibles, and installation rules.
Illustrates the correct installation of Type B gas vent system.
States that chimney venting must comply with codes and regulations.
Steps to follow when removing a boiler from a common venting system.
Lists approved U.L. listed stainless steel vent pipe materials for horizontal venting.
Illustrates horizontal vent termination fittings and pitch requirements.
Specifies vent pipe sizes, maximum lengths, and elbow reduction factors.
Details termination fittings, wall penetration, and thimble requirements for combustible walls.
Illustrates minimum clearances for vent termination from walkways, openings, and utilities.
Provides detailed rules for vent termination locations and protection from elements.
Step-by-step instructions for sealing Z-Flex Z-Vent pipe joints with silicone.
Step-by-step instructions for sealing Heat-Fab Saf-T-Vent pipe joints with silicone.
Instructions for sealing Flex-L StaR-34 vent pipe joints and using joiner bands.
Instructions for joining and sealing ProTech FasNSeal vent pipe with internal gasket and locking band.
Guidelines for supporting different types of stainless steel vent piping.
Discusses using power venter kits as an alternative sidewall venting method.
Instructions for connecting the gas line to the boiler, including materials and methods.
Details pipe sizing, pressure checks, and safety precautions for gas supply.
Table showing pipe capacity in BTU/hr for natural gas based on pipe size and length.
Table showing pipe capacity in BTU/hr for propane based on tubing/pipe size and length.
Specifies requirements for the 115-volt power supply circuit and connections.
Provides guidance on where and how to install the thermostat for optimal performance.
Describes the step-by-step process of how the boiler starts, runs, and shuts down.
Illustrates the electrical connections to the boiler's control module.
Step-by-step instructions for filling the boiler and heating system with water.
How to check and maintain the correct operating water pressure in the system.
Critical safety information and operating procedures for starting the boiler.
Detailed steps for lighting the boiler with an intermittent pilot system.
Procedure to test the ignition system safety shutoff device.
Instructions for adjusting the pilot and main burner flames for proper operation.
Describes the correct appearance of the main burner flame (sharp blue inner mantel).
Guidance on setting the thermostat heat anticipator and checking operation.
Procedures for cleaning flue passages, burners, and checking connections.
Covers maintenance for expansion tank, vent pipe, circulator pump, and low water cutoff.
Lists common causes and solutions for system not heating or insufficient heat.
Addresses causes and solutions for noisy burners and relief valve leaks.
Explains the function and installation of the safety relief valve and expansion tank.
Describes optional accessories like air purgers, automatic fill valves, and water temperature control.
Explains how the pressure switch operates and its set points.
Describes the function and replacement of the rollout safety switch.
Safety and environmental precautions for installing the control module.
Details how to connect wiring harnesses and thermostat to the control module.
Procedure to enter adjustment mode and change setpoint and differential.
Explains the different operational states of the boiler control module and their definitions.
Explains how the high limit controller ends the heating cycle and its lockout state.
Provides general troubleshooting steps and refers to error code tables.
Lists error codes, their definitions, and consequences for the control module.
Steps to check the ignition cable, grounding, and connections for the pilot system.
Instructions for checking the spark ignition circuit and listening for sparking noise.
Explains correct pilot flame appearance and common causes for flame problems.
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