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General| Brand | DORCHESTER |
|---|---|
| Model | DR-FC 25 |
| Category | Water Heater |
| Language | English |
Manual describes installation, service, and use of DR-FC water heater, its features, and compliance.
Instructions to follow if a gas smell is detected, emphasizing safety precautions.
Lists relevant regulations, standards, and documents for appliance installation and safety.
Identifies the three main target groups for the manual and their corresponding symbols.
Recommends annual service for water and gas sides, and checks after installation.
Explains the different notations used in the manual, including Remark, Note, and Warning.
Provides a summary of the document's chapters and their target groups.
Lists topics covered in the chapter: functional description, heating cycle, protection, and safety.
Explains the components of the water heater through a cut-away view and legend.
Details the cold water entry, heating process, air supply, flue gas, condensation, and insulation.
Explains how the control panel monitors water temperature and ensures safe combustion.
Explains frost protection, maximum temperature safeguard, and extra safety lockout.
Describes the gas control system, including safety valves and softlite ignition.
Explains the fan's role in air supply, pre/post-purge, and speed monitoring.
Details the pressure switch function for flue gas discharge and air supply during operation.
Explains the flame probe's role in detecting flame via ionization for safety.
Covers safety aspects for unvented, vented, and T&P valve installations.
Details safety components for unvented systems to prevent excessive pressure.
Explains safety requirements for vented systems, including open tank and vent pipe.
Describes the mandatory T&P valve for unvented installations and its function.
Discusses optional variations like LPG, unvented supply kits, and circulation pumps.
Lists installation activities: packaging, environmental conditions, specs, connections, gas, flue, electrical, pressure, conversion.
Advises careful removal of packaging and unpacking near the intended location.
Discusses room-sealed installation types and installation in closed or open rooms.
Specifies maximum humidity (93% RH at +25°C) and functional ambient temperature range (0-60°C).
Details weight specifications for different models and the need to consider floor loading.
Recommends specific clearances (AA, BB) for access to controls, openings, and anode replacement.
Refers to dimensions and accessory specifications based on figures and tables.
Refers to diagrams for unvented and vented installations and their connections.
Details cold water, recirculating pump, hot water, circulation pipe, and condensation drainage connections.
Details cold water, recirculating pump, hot water, circulation pipe, and condensation drainage connections.
Provides instructions for connecting the gas supply, including safety and pipe sizing.
Discusses approved installation types for air and flue systems, including terminal specifications.
Specifies the required wall flue terminal model and its material and diameter specifications.
Specifies the required roof flue terminal model and its material and diameter specifications.
Topics covered: preparation, mains voltage, and optional connections.
Details essential steps for connecting phase, neutral, and earth, and checking for potential differences.
Explains the requirement for a permanent electrical connection and a double pole isolator.
Describes when an isolating transformer should be used and how to connect it.
Explains how to connect a continuous pump to the water heater.
Details how to connect a program-controlled pump, dependent on control panel settings.
Describes the function of the external ON/OFF switch for overriding operating modes.
Explains connecting an external signal for error indication, e.g., turning on a lamp.
Provides a procedure for checking gas supply and burner pressures using pressure gauges.
Outlines the procedure for adapting the water heater for different gas categories using a conversion kit.
Lists topics covered: filling the water heater and draining the water heater.
Details the process of filling the water heater for both unvented and vented installations.
Step-by-step guide to filling an unvented water heater installation, including bleeding air.
Step-by-step guide to filling a vented water heater installation, including bleeding air.
Provides procedures for draining the water heater for both unvented and vented installations.
Describes the menu-driven control panel, its display, buttons, and connectors.
Explains how to operate the water heater using the control panel's display and buttons.
Provides a table explaining the meaning of the icons displayed on the control panel.
Details the function of the ON/OFF switch for the control panel and its effect on the water heater.
Explains the use of navigation buttons (UP, DOWN, ENTER, RESET) for menu operation.
Describes the PC connection for technicians to read status and history for troubleshooting.
Lists topics covered: operating modes, error conditions, and service condition.
Describes the four basic operating modes: OFF, ON, EXTRA, and PROG, with display examples.
Explains how errors are displayed, types of errors (lock out, blocking), and basic troubleshooting steps.
Describes the 'SERVICE REQUIRED' message and its relation to burning hours and service intervals.
Lists topics covered: starting up and shutting down the water heater.
Provides a step-by-step guide for starting up the water heater, including filling and power connection.
Covers procedures for shutting down: brief period (OFF mode), isolating from power, and longer periods.
Instructions for long-term shutdown, including draining the water heater.
Explains the sequence of states (HEAT DEMAND, PRE-PURGE, IGNITION, RUNNING, POST-PURGE) during heating.
Introduces the main menu accessed via the control panel and lists its primary options.
Explains the notation used for navigating menus and sub-menus within the manual.
Describes how to switch the water heater into the 'ON mode' from any operational mode.
Details how to set the water temperature via the SETPOINT MENU and during ON mode.
Explains how to set water temperature for specific days and times using the week program.
Guides users on how to insert new switch-on and switch-off times into a week program.
Instructs on how to remove programmed switch-on/off times from the week program.
Explains how to use an extra period to activate the heater for a specific duration.
Provides steps for programming an extra period, including setting times and temperatures.
Allows adjustment of certain settings and display of water heater specifications.
Guides on how to select the desired language for the control panel's menu interface.
Details the procedure for setting the current day of the week and time on the control panel.
Explains how to view water heater specifications like fan speed and regulation interval.
Outlines the functions of the service program for installers and maintenance engineers.
Explains how to set the hysteresis (heating margin) to prevent frequent switching on/off.
Guides on how to view 'Blocking errors' and 'Lock out errors' from the control panel.
Explains how to display burning hours, ignitions, and error counts of the water heater.
Shows how to view the currently selected water heater model, preset at the factory.
Details how to control the circulation pump's ON/OFF state via the service menu.
Explains how to set the service interval based on burning hours for maintenance reminders.
Guides on adjusting the display contrast percentage from 0% to 100%.
Details how to set the duration the display backlight remains lit after button presses.
Explains how to adjust the display scroll speed for menu navigation.
Distinguishes between general errors and displayed errors, and how they are reported.
Provides solutions for general errors like gas smell, no hot water, and water leakage.
Lists displayed error codes, possible causes, solutions, and remarks for error resolution.
Recommends annual service for water and gas sides, and notes maintenance frequency depends on usage.
Explains how the service interval is set based on burning hours and triggers 'SERVICE REQUIRED' message.
States that maintenance is performed by approved engineers on water and gas sides.
Details steps to test components and prepare the water heater before service.
Covers checks and cleaning for anodes, heater descaling, and condensate discharge.
Covers cleaning of the burner, orifice, and heat exchanger.
Provides instructions for cleaning the combustion chamber and heat exchanger using vacuum and water.
Includes steps like filling, restarting the heater, and removing the 'SERVICE REQUIRED' message.
States that the appendix contains the Electrical diagram DR-FC and a Week program card.
Presents the detailed electrical wiring diagram for the DR-FC water heater.
