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General| Brand | Spheros |
|---|---|
| Model | Thermo E 320 |
| Category | Water Heater |
| Language | English |
Defines the manual's role in supporting personnel for maintenance and repair of Spheros water heaters.
Specifies the applicability of the manual to heaters listed and notes on amendments and current versions.
Explains the meaning of CAUTION, ATTENTION, and NOTE tags used within the manual for safety and information.
Recommends consulting other Spheros documents like operating instructions and installation guides.
Covers legal installation regulations, general safety rules, and specific safety precautions for heater operation.
Details requirements for the combustion air intake opening to ensure proper airflow and prevent contamination.
Specifies guidelines for the exhaust pipe, including securing, dimensions, and avoiding obstructions.
Provides a warning against mechanically stressing the temperature sensor cable during handling.
Provides contact information for submitting feedback, complaints, or suggestions for manual improvements.
States that all components and the circulating pump are designed for 24V nominal voltage.
Outlines approved fuels and their limitations, emphasizing fuel quality and additive usage.
Lists the main components of the burner, including motor, fan, fuel pump, and ignition unit.
Explains the function of the heat exchanger in transferring heat from combustion to the coolant.
Describes the combustion chamber's role and notes on correct installation and types for different models.
Details the function and types of circulating pumps used with the heaters, including specifications.
Introduces the optional heatable fuel filter and its importance for low-temperature operation.
Explains the basic principle of the high-pressure atomizer burner and control unit operation.
Illustrates the sequence of operations during heater start-up, heating, and shutdown phases.
Defines malfunction and heater interlocks, their protective functions, and triggers like thermal loads.
Lists specific malfunction criteria that lead to a fault shut-down and interlock during various operational stages.
Describes the heater interlock state, which overrides standard malfunctions and requires trained personnel intervention.
Explains how error codes are displayed via the digital timer or flash code on the operating display.
Introduces troubleshooting, emphasizing that it should only be performed by trained personnel.
Lists common error symptoms like non-illuminated displays and potential causes like fuse issues or supply voltage.
Explains how error causes are outputted as flash codes via the operating display, detailing signal counts.
Details specific error symptoms like 'No start' or 'Flame interruption' and their implications for interlocks.
Guides on testing individual components through visual inspection and manual electrical testing.
Provides instructions for checking the resistance of the temperature sensor with integrated overheating protection.
Describes how to inspect the burner motor, including applying 24V DC voltage and checking connections.
Details visual inspection of the electronic ignition unit and ignition electrode for proper function.
Explains inspection procedures for the ignition electrode, including distance checks and insulation integrity.
Guides on cleaning the flame detector glass and notes that replacement is not possible; error diagnosis via flash code.
Outlines procedures for inspecting fuel pump pressure, including pre-checks and factory-set adjustments.
Details inspection of the solenoid valve, emphasizing that it must be completely replaced if faulty.
Describes how to inspect the nozzle block preheater, including its heating element and thermostat function.
Presents heater connection options to the vehicle electrical system and recommended cable cross-sections.
Highlights that only trained personnel should perform heater servicing and specifies safety precautions.
Lists recommended yearly maintenance activities for reliable long-term operation.
Details the procedure for measuring and setting the CO2 content in exhaust gases for optimal combustion.
Emphasizes safety precautions before disassembly and the use of genuine spare parts.
Provides step-by-step instructions for removing and installing the burner assembly.
Guides on safely removing and installing the temperature sensor, including coolant handling.
Details the process for removing and installing the heater hood to access internal components.
Outlines the steps for removing and installing the burner motor assembly.
Explains how to remove and install the electronic ignition unit and ignition electrode.
Provides instructions for removing and installing the heater's control unit.
Details the procedure for removing and installing the fuel pump, including safety notes on fuel handling.
Guides on removing and installing the solenoid valve, noting it must be replaced as a complete unit.
Explains the process for removing and installing the atomizer nozzle, including tightening torque.
Details the steps for removing and installing the combustion chamber, with notes on correct orientation.
Provides instructions for removing and installing the heat exchanger, including coolant hose management.
Covers the overall process for removing and installing the complete heater unit.
Guides on initial start-up procedures after component installation, including fuel and coolant bleeding.
Specifies requirements for cleaning and packaging heaters or components sent for inspection or repair.
Outlines periodic inspection and maintenance activities for the heater, with recommended intervals.
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