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Describes the Dorchester DR-LA water heater, its type, and applicable models.
Provides immediate safety instructions and actions to take in case of a gas leak.
Outlines legal requirements and standards for installation and use.
Identifies the intended users of the manual and associated symbols.
Recommends annual servicing and defines responsibilities for maintenance.
Explains the meaning of symbols used for caution, notes, and warnings.
Provides a summary of the manual's chapters and their content.
Introduces the topics covered in the chapter on the water heater's function.
Details the cut-away view and identifies key components of the water heater.
Explains the operational sequence and states of the water heater's heating process.
Describes safety mechanisms like water temperature protection, combustion products discharge safety device, and flame probe.
Covers safety aspects for unvented, vented installations, and the T&P valve.
Describes volt-free contacts for remote indication of operational status.
Lists additional variations like LPG, unvented supply, and top-to-bottom circulation.
Introduces the chapter covering all installation activities and prerequisites.
Provides instructions for careful unpacking and handling of the water heater.
Specifies room conditions, floor loading, and working clearances for installation.
Presents detailed dimensions and general/electrical data for the water heater models.
Illustrates water and gas connection diagrams for unvented and vented installations.
Details cold water, recirculation pump, hot water, drain valve, and circulation pipe connections for unvented systems.
Details cold water, recirculation pump, hot water, drain valve, and circulation pipe connections for vented systems.
Provides warnings and notes regarding the gas supply connection requirements.
Covers flue gas system requirements, including draught diverter and thermostat assembly.
Covers electrical connection procedures, preparation, and mains power connection.
Details the procedures for checking and adjusting gas supply and burner pressures.
Explains the process for adapting the water heater for different gas categories, including model-specific procedures.
Introduces the chapter that details the procedures for filling and draining the water heater.
Provides step-by-step instructions for filling the water heater, covering both unvented and vented installations.
Outlines the procedures required to drain the water heater, covering both unvented and vented installations.
Introduces the chapter focusing on the water heater's control panel and functions.
Describes the control panel, its symbols, ON/OFF switch, thermostat, and reset buttons.
Introduces the chapter covering the operating and error states of the water heater.
Describes the three main operating states: Isolated, Off, and On, and their indicators.
Categorizes and describes the various error conditions, including lockouts and blocking errors.
Introduces the chapter on procedures for starting and stopping the water heater.
Provides a step-by-step guide for initiating the water heater's operation and setting temperature.
Details procedures for shutting down the water heater for different durations, including isolation and frost protection.
Explains the sequence of operations during the water heater's heating cycle, from heat demand to rest.
Lists common problems and categories of error conditions addressed in this chapter.
A guide to diagnosing and resolving common general errors like gas smell and water leaks.
A table to help diagnose issues when the water heater fails to provide any hot water supply.
A table to help diagnose situations of insufficient hot water supply and related causes.
Introduces the maintenance section, outlining the scope and importance of regular servicing.
Outlines initial steps to test component functionality and prepare for maintenance tasks.
Covers checking anodes and descaling the heater, along with their respective procedures.
Covers cleaning burners and orifices, and checking flue baffles.
Describes the final steps to complete after performing maintenance tasks.
States that this appendix contains the electrical diagram for the DR-LA water heater.
Provides electrical diagrams for DR-LA models, covering natural gas and LP gas variants.
General| Brand | DORCHESTER |
|---|---|
| Model | DR-LA 95 |
| Category | Water Heater |
| Language | English |
