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Details critical DANGER, WARNING, and CAUTION statements for safe operation and installation.
Instructions for inspecting the heater upon delivery and reporting any shipping damage.
Guidance on locating and understanding the heater's model and serial number.
Information on heater certifications and operational limits at different altitudes.
Details on water temperature risks, scalds, and recommended settings for safety.
Lists applicable codes and regulations for heater installation.
Specifies requirements for a stable and safe mounting surface for the heater.
Details on how to safely stack multiple heater units using approved kits.
Minimum required clearances for indoor heater installations.
Minimum required clearances for outdoor heater installations.
Ensuring adequate and uncontaminated air for indoor unit combustion.
Guidelines for ducting combustion air directly to the heater.
Requirements for air supply from inside the building for U.S. installations.
Advice on locating the heater to prevent water damage and system requirements.
Step-by-step instructions for changing water connections to the opposite side.
Safety guidelines for installing pressure relief valve discharge piping.
Procedure for performing a hydrostatic test on the piping system.
Managing potential condensation issues during cold water starts.
Addressing continuous operation with cold water inlet temperatures.
Guidance on selecting the correct pump and understanding flow rates for hydronic heating.
Specifies required gas supply pressure and regulator settings for natural and propane gas.
Steps to check incoming voltage and ensure proper polarity and grounding.
Instructions for connecting power wiring, including safety precautions.
Guidance on connecting field-supplied controllers and wiring.
Classification of heaters based on vent pressure and condensate production.
Recommendations for proper vent pipe support and installation practices.
Details on Category I natural draft vertical venting installation and termination.
Guidelines for Category III horizontal venting, including length limits and termination.
Detailed operational steps for lighting and running models 399B through 899B.
Detailed operational steps for lighting and running models 989B through 2339B.
Explanation of the ignition module's function and diagnostic codes.
Description and adjustment of the manual reset high limit control.
Details on the flow switch's role in safety and operation.
Information on different types of operating controls and their settings.
Explanation of the optional low water cut-off safety device.
Functionality of high and low gas pressure switches for safety.
Essential checks before lighting the heater, including system fill and air purge.
List of necessary tools and initial steps for starting the heater.
Steps to check incoming power supply voltage and polarity.
Instructions for attaching manometers to measure gas and air pressures.
Procedures for checking and setting the gas supply pressure.
Guide for adjusting blower air and main burner manifold pressure.
Checking thermostats, high limits, and gas pressures before ignition.
Procedure to test the supervised ignition system's pilot burner performance.
Method for performing leak tests on dual-seat gas valves.
Step-by-step guide for lighting the heater and ensuring proper operation.
Procedure for safely shutting off the gas supply to the appliance.
Recommended routine maintenance tasks for optimal heater performance.
Scheduled maintenance procedures for compliance and longevity.
Impact of contaminated air on heater efficiency and materials.
General