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DORCHESTER DR-FC 25 Installation, Comissioning And Maintenance Instructions

Condensing hot water storage heaters
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DORCHESTER
DR-FC 25 to DR-FC 120
CONDENSING HOT WATER
STORAGE HEATERS
Installation, Commissioning
and Maintenance Instructions
DORCHESTER MODELS: DR-FC 25, 30, 45, 60, 80, 95, 120
Room Sealed or Open Flue, Direct Gas Fired Condensing Hot Water
Storage Heaters with Premix Burner and Automatic Ignition for
Domestic Hot Water Installations
NOTE:
THESE INSTRUCTIONS MUST BE READ AND UNDERSTOOD BEFORE
INSTALLING, COMMISSIONING, OPERATING OR SERVICING EQUIPMENT.
ND
THIS WATER HEATER IS FOR USE ON GROUP H NATURAL GAS (2 FAMILY) I ,
2H
RD
OR PROPANE (3 FAMILY) I . PLEASE ENSURE RELEVANT INFORMATION
3P
REQUIRED WITHIN DOCUMENT IS FOUND RELATING TO GAS TO BE FIRED
BEFORE FIRING HEATER.
THIS WATER HEATER COMPLIES WITH ALL RELEVANT EUROPEAN DIRECTIVES.
PUBLICATION NO. 50001195
ISSUE: "A".
FEBRUARY 2010
0309429

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Summary of Contents for DORCHESTER DR-FC 25

  • Page 1 STORAGE HEATERS Installation, Commissioning and Maintenance Instructions DORCHESTER MODELS: DR-FC 25, 30, 45, 60, 80, 95, 120 Room Sealed or Open Flue, Direct Gas Fired Condensing Hot Water Storage Heaters with Premix Burner and Automatic Ignition for Domestic Hot Water Installations...
  • Page 3 Errata The amendments below apply to determining and setting the correct service interval for these appliances. These instructions supercede the previous instructions on how to determine and set the service interval.. Setting the service interval To reset the message The displayed message can be reset in either of The service interval is a feature of the controller to two ways.
  • Page 5 Read this manual carefully Warning Read this manual carefully before starting the water heater. Failure to read the manual and to follow the printed instructions may lead to personal injury and damage to the water heater. Copyright © 2010 All rights reserved. Nothing from this publication may be copied, reproduced and/or published by means of printing, photocopying or by whatsoever means, without the prior written approval of the supplier.
  • Page 6 Instruction manual DR-FC...

  • Page 7: Table Of Contents

    Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 41 Conversion of DR-FC 25 through 60 - - - - - - - - - - - - - - - - - - - 41...
  • Page 8 Table of contents Status of the water heater - - - - - - - - - - - - - - - - - - - 51 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 51 Operating modes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 51 Error conditions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 52 Service condition - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 52...
  • Page 9 Performing maintenance - - - - - - - - - - - - - - - - - - - - 83 15.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 83 15.2 Preparation for maintenance - - - - - - - - - - - - - - - - - - - - - - - 83 15.3...
  • Page 10 Table of contents Instruction manual DR-FC...

  • Page 11: Introduction

    Alternatively, the water heater can be connected using a parallel system. The possible installation types are B23, C13, C33, C43, C53 and C63. The information in this manual applies to types: DR-FC 25, DR-FC 30, DR-FC 45, DR-FC 60, DR-FC 80, DR-FC 95 and DR-FC 120.

  • Page 12: Target Groups

    Introduction The installation should also be in accordance with any relevant requirements of the HSE, local gas region and local authority and the relevant recommendations of the following documents: British and European Standards • BS 6891: Installation of low pressure gas pipework of up to 35 mm (R1¼) in domestic premises (2nd family gas) - Specification.

  • Page 13: Maintenance

    Symbols on each page indicate the target groups for whom the information is intended. See the table. Target group symbols Symbol Target Group (End) user Installation engineer Service and maintenance engineer Caution This water heater is not intended for use by persons with reduced physical, sensory or mental capacities, or who lack the necessary experience or knowledge, unless the person responsible for their safety is supervising them or has explained to them how the water heater should be used.

  • Page 14: Overview Of This Document

    Introduction Overview of this The table provides an overview of the contents of this document. document Contents of this document Chapter Target groups Description Working principle of This chapter describes the working principle of the water heater. the water heater Installation This chapter describes the installation activities to be carried out before final commissioning.

  • Page 15: Working Principle Of The Water Heater

    Working principle of the water heater Introduction This chapter covers the following topics: • General working principle of the water heater; • Water heater operating cycle; • Protection for the water heater; • Safety of the installation. General working The water heater is fitted with a modulating premix burner system with 1:1 gas-to-air ratio regulation.
  • Page 16 Cut-away view of the water heater Legend DR-FC 25, 30, 45, 60 DR-FC 80, 95, 120 Unused numbers are not applicable cover hot water outlet electrical connector block controller pressure switch control panel temperature sensor T combustion chamber anode tank...

  • Page 17: Water Heater Operating Cycle

    Water heater operating cycle The temperature sensor T (7) measures the water temperature at the top of the water heater T ). This temperature is sent to the controller. As soon as T lower than the set water temperature (T ), the controller registers a "heat demand".

  • Page 18: Safety Of The Installation

    Working principle of the water heater 2.4.5 Pressure switch The pressure switch only guarantees the supply of air during pre-purging of the water heater. If the pressure difference during pre-purging is sufficient, the pressure switch closes. The table (3.4.2 "General and electrical specifications") shows the trip point for each water heater.

  • Page 19: Installation

    Installation Warning The installation should be carried out by a competent person in compliance with the general and locally applicable regulations imposed by the gas, water and power supply companies and the fire service. The water heater may only be installed in a boiler room that complies with the requirements stated in national and local ventilation regulations (1.3...
  • Page 20 Installation 3.3.1 Air humidity and ambient temperature The boiler room must be frost-free, or be protected against frost. The table shows the ambient conditions that must be adhered to for correct functioning of the electronics present in the water heater to be guaranteed. Air humidity and ambient temperature specifications Air humidity and ambient temperature Air humidity...

  • Page 21: Technical Specifications

    Working clearances IMD-0765 R0 DR-FC 80 through 120 DR-FC 25 through 60 Note When installing the water heater, be aware that any leakage from the tank and/or connections can cause damage to the immediate environment or floors below the level of the boiler room. If this is the case, the water heater should be installed above a waste water drain or in a suitable metal leak tray.
  • Page 22 3.4.1 Dimensions of the water heater Top and front view of the water heater Legend DR-FC 25, 30, 45, 60 DR-FC 80, 95, 120 See the table. 44º 6.5º 45º 18º 45º 45º 18º 45º IMD-0771 R0 IMD-0775 R0...
  • Page 23 Dimensions (all dimensions in mm, unless otherwise stated) Dimen- Description Unit DR-FC 25 DR-FC 30 DR-FC 45 DR-FC 60 DR-FC 80 DR-FC 95 DR-FC 120 sion Total height 1485 2005 2005 2005 2060 2060 2060 Position on base Water heater diameter...
  • Page 24 3.4.2 General and electrical specifications DESCRIPTION Unit DR-FC 25 DR-FC 30 DR-FC 45 DR-FC 60 DR-FC 80 DR-FC 95 DR-FC 120 Contents litres Empty weight Maximum floor load Maximum operating pressure (vented) kPa (bar) 800 (8) 800 (8) 800 (8)
  • Page 25 3.4.3 Gas data description Unit: DR-FC 25 DR-FC 30 DR-FC 45 DR-FC 60 DR-FC 80 DR-FC 95 DR-FC 120 2H3P Gas category 2H: G20-20 mbar Venturi restrictor diameter 7.60 7.60 7.60 7.60 8.60 8.60 8.60 Nominal input (gross) 31.6 32.6 51.2...

  • Page 26: Installation Diagram

    Installation Installation diagram The figure shows the Installation diagram. This diagram is referred to in the sections describing the actual connection procedure. Installation diagram Legend Vented and unvented UNVENTED Unused numbers are not applicable pressure relief valve (mandatory if the mains water pressure is too high) T&P valve (mandatory) stop valve (recommended)

  • Page 27: Unvented Water Connections

    Unvented water Warning The installation should be carried out by a competent person, in compliance connections with general and locally applicable regulations (1.3 "Regulations"). 3.6.1 Cold water side See (A) in the installation diagram (3.5 "Installation diagram"). 1. Fit an approved stop valve (4) on the cold water side as required by the applicable regulations (1.3 "Regulations").

  • Page 28: Vented Water Connections

    Installation Vented water Warning The installation should be carried out by a competent person, in compliance connections with general and locally applicable regulations (1.3 "Regulations"). 3.7.1 Cold water side See (A) in the installation diagram (3.5 "Installation diagram"). 1. Fit an approved stop valve (4) on the cold water side between the cold water head tank (18) and the water heater, as required by applicable regulations.

  • Page 29: Air Supply And Chimney Flue Discharge

    3. Close the manual gas valve. 4. Fit the gas supply pipe to the gas control valve. Warning After fitting, check for leaks. Air supply and chimney flue discharge 3.9.1 Introduction This section covers the following topics: • Requirements for flue gas discharge materials •...
  • Page 30 Installation Installation types IMD-0790 R0 Instruction manual DR-FC...
  • Page 31 Water heater Diameter Maximum Maximum length number of 90° bends DR-FC 25, 30, 45, 60 100/150 mm 40 m DR-FC 80, 95, 120 130/200 mm 15 m Caution Both conditions stated in the table must be fulfilled. Even if you use less than the stated maximum number of bends, the maximum pipe length still may not be exceeded.

  • Page 32: Specifications

    Concentric wall flue terminal specifications C13 Subject Description 562702040 Wall flue terminal set: Art. No. DR-FC 25, 30, 45, 60 • 1x Wall flue terminal 562702041 DR-FC 80, 95, 120 (incl. wall flange & clamping ring) Manufacturer Muelink & Grol •...
  • Page 33 Concentric roof flue terminal specifications C33 Subject Description 532702155 Roof flue terminal set: Art. No. DR-FC 25, 30, 45, 60 • 1x Roof flue terminal 532702158 DR-FC 80, 95, 120 (incl. clamping ring) Manufacturer Muelink & Grol • 1x Pipe 1000 mm...

  • Page 34: Electrical Connection

    Installation Practical example of parallel flue gas discharge Example The figure shows a DR-FC 30 installation. This has to be fitted with a 10 m parallel pipe of 100 mm diameter, and eight 90 degree bends. The configuration must be checked for compliance with the requirements stated in the table. Water heater with parallel flue gas discharge material IMD-0792 R0 The longest pipe must be used to check the maximum length.
  • Page 35 3.10.2 Preparation Caution The water heater is phase-sensitive. It is absolutely essential to connect the mains live (L) to the live of the water heater, and the mains neutral (N) to the neutral of the water heater. Caution There must be no potential difference between neutral (N) and earth ( ). If this is the case, then an isolating transformer (3.10.4 "Isolating transformer") must be used in the supply circuit.
  • Page 36 Installation Terminal block Isolating transformer Program- Exter- Mains BUS- Alarm Out controlled voltage link primary secondary pump ON/OFF 16 through 20 3.10.3 Connecting the mains power The water heater is supplied without a power cable and isolator. Note In order to receive electrical power, the water heater has to be connected to the mains power by means of a permanent electrical connection.

  • Page 37: Checking Supply Pressure, Co 2 Value And Switching Pressure

    3.10.6 Connecting an extra ON mode switch External ON/OFF is an option for connecting an external ON/OFF switch. In the OFF position, the programmed operating mode is active. In the ON position, the programmed operating mode is overruled, and "ON mode" is active.
  • Page 38 Installation 7. Switch on the power to the water heater using the isolator on the water heater. 8. Switch the controller ON by setting the 0/I switch to position I. The display will now show INTERNAL CHECK for about 10 seconds, and will then go to the main menu.
  • Page 39 (3.4.3 "Gas data"). DR-FC 25 through 60 14. If necessary, adjust the CO value using the adjustment screw (2) until the value is within the range listed in the table of CO values.
  • Page 40 Installation Note Turning to the left (anticlockwise) means more gas (higher CO level) and turning to the right (clockwise) means less gas (lower CO level). 15. If you have increased Tset, set it back to the original value using 16. Continue with the low-load CO measurement.
  • Page 41 Legend test point adjusting screw IMD-0763 R0 Note Turning to the left (anticlockwise) means less gas (lower CO level) and turning to the right (clockwise) means more gas (higher CO level). 24. Remove the CO measurement probe from the test point of the flue gas outlet pipe.
  • Page 42 Installation 10. Read the pressure from the meter at the moment when the water heater switches from PRE PURGE to PRESSURE SWITCH. At this point, the water heater's display will show: Ê Ê Ê 13:45 Thursday 63ÉC Tset 65ÉC PRESSURE SWITCH 11.

  • Page 43: Conversion To A Different Gas Category

    1. Isolate the water heater from the power supply (10.3 "Isolating the water heater from the mains"). DR-FC 25 through 60 2. Shut off the gas supply. 3. Undo the screws of the covers. 4. Carefully remove the covers from the water heater.
  • Page 44 Conversion to a different gas category Conversion of gas control valve in DR-FC 25 through 60 Legend 3-part connector gas inlet connector offset adjustment coupling gas inlet coupling restrictor (incl. gasket) venturi flange test point gas control valve sticker IMD-0796 R0 13.

  • Page 45: Conversion Of Dr-Fc 80 Through 120

    23. Replace the covers. 24. From the conversion set, take the "large" sticker that indicates the new (modified) gas category. Affix this below the identification plate of the water heater. This makes it clear that the water heater no longer functions on the gas for which it was originally supplied.
  • Page 46 Conversion to a different gas category Conversion of gas control valve in DR-FC 80 through 120 Legend 3-part connector gas inlet coupling offset adjustment coupling gas inlet connector hose clamp venturi venturi flange restrictor restrictor gasket flange/gas control valve gasket gas control valve sticker IMD-0797 R0 16.

  • Page 47: Filling

    Filling Installation diagram Legend Vented and unvented UNVENTED Unused numbers are not applicable pressure relief valve (mandatory if the mains water pressure is too high) T&P valve (mandatory) stop valve (recommended) non-return valve (mandatory) circulation pump (optional) drain valve manual gas valve (mandatory) service stop valve temperature gauge (optional)

  • Page 48: Filling Unvented Installations

    Filling Filling unvented To fill the water heater, proceed as follows: installations 1. Open the stop valve (11) in the hot water pipe and, if present, the stop valves (4) for the circulation pump (6). 2. Close the drain valve (9). 3.

  • Page 49: Draining

    Draining Installation diagram Legend Vented and unvented UNVENTED Unused numbers are not applicable pressure relief valve (mandatory if the mains water pressure is too high) T&P valve (mandatory) stop valve (recommended) non-return valve (mandatory) circulation pump (optional) drain valve manual gas valve (mandatory) service stop valve temperature gauge (optional)

  • Page 50: Draining Unvented Installations

    Draining Draining unvented Some service activities require the water heater to be drained. The procedure is as follows: installations 1. Activate the MENU with MENU »OFF ^ ON È WEEK PROGRAM 2. Position the cursor in front of OFF. 3. Confirm OFF with 4.

  • Page 51: The Control Panel

    The control panel Introduction Explanation of icons This chapter covers the following topics: The table explains the meanings of the icons. • Control; Icons and their meaning • Explanation of icons; Name Explanation • ON/OFF switch on controller; • Navigation buttons;...

  • Page 52: Navigation Buttons

    The control panel Navigation buttons The use of these buttons is explained with the help of the figure showing the main menu (11 "Main menu"). The navigation buttons are: • Buttons for UP , and DOWN • Enter: • Reset button: The arrows ^ and È...

  • Page 53: Status Of The Water Heater

    Status of the water heater Introduction 8.2.3 EXTRA This chapter covers the following topics: In this mode, one extra period is programmed and activated. In this mode, the OFF orPROG mode is • Operating modes; temporarily overruled to fulfil a single period of •...

  • Page 54: Error Conditions

    Status of the water heater 2. The current time falls outside a set time period Service condition of the week program. The figure shows the message The figure shows the display with the following information: WARNING line one: the text PROG; MAX.

  • Page 55: Starting The Water Heater

    Starting the water heater Introduction 6. Confirm the selection START OPERATION with This chapter covers the following topics: The water heater is now in "ON mode". If there is • Starting the water heater. a heat demand, the water heater will run through •...
  • Page 56 Starting the water heater When the water heater starts, it will run through the 5. After a number of seconds pre-glow, the gas following steps: control valve is opened and ignition takes place. 1. The water temperature drops below the set The icon is activated.

  • Page 57: Shutting Down

    Shutting down 10.1 Introduction 10.3 Isolating the water heater from the mains This chapter describes: The water heater may only be isolated from mains • Decommissioning the water heater for a short power in the correct way. The correct procedure is as period.
  • Page 58 Shutting down Instruction manual DR-FC...

  • Page 59: Main Menu

    Main menu 11.1 Introduction 11.2 Notation convention for menu-related instructions The MENU is reached by pressing the button on the controller. The MENU ( ) of the controller is divided into sub-menus. For example, SETTINGS is one of the MENU functions reached from the main menu.

  • Page 60: Week Program

    Main menu • Confirm with .After confirming, the water When the week program is running, if the water heater enters "ONmode". temperature becomes too low, then the water heater will run through the operating cycle (2.3 "Water heater SETPOINT operating cycle"), then return to the week program.
  • Page 61 The display shows the menu for the week program, Confirm with see the figure below. With the default setting, the The cursor moves to the minute digits, which will program switches on and off every day at 00:00 and blink. 23:59 hours respectively, the water temperature is 65°C and the pump is switched on (P).

  • Page 62: Adding Times To A Week Program

    Main menu 11.7.3 Week program: setting the water 11.8 Adding times to a week program temperature Call up the menu to INSERT switch-on and switch-off times into a week program as follows: 1. Use to set the water temperature. In the example this is 75°C.

  • Page 63: Deleting Times From A Week Program

    To delete a period, proceed as follows: Example : WEEK PROGRAM | PROGRAM OVERVIEW. As an example, we will program an extra period in Confirm with which the switch-on time is set to 18:00 hours, and the corresponding switch-off time to 22:00 hours. The MENU water temperature will be set to 75 °C and the pump will run continuously.

  • Page 64: Extra Period

    Main menu 5. The lines showing switch-on/off times are replaced Confirm with by the text DELETE BLOCK?. See the figure. MENU Confirm with (or use to cancel) ^ WEEK PROGRAM È»EXTRA PERIOD DAY TIME Tset ON ! DELETE The display show the settings for the extra period. BLOCK? Setting the switch-on time 00:00 65ÉC P...

  • Page 65: Settings

    2. Use to set the minutes. In the example, • Displayable water heater specifications, this this is 45. category is only relevant to the installation engineer and/or service and maintenance Confirm with engineer The cursor moves to the water temperature. See Regulation interval (water temperature).
  • Page 66 Main menu 3. Scroll with to DAY/TIME 11.11.3 Displaying water heater specifications Confirm with SETTINGS Note LANGUAGE This category is solely intended for the installation ^»DAY/TIME engineer and/or service and maintenance engineer. È SPECIFICATIONS The corrected data is shown in the table of general The display shows the sub-menu for adjusting the and electrical data (3.4.2 "General and electrical...

  • Page 67: Service Program

    Service program 12.1 Introduction Set the hysteresis as follows: • : HYSTERESE UP The service program is used by the installation engineer or service and maintenance engineer for: The figure shows an example • Displaying the water heater history; Set the hysteresis as follows •...

  • Page 68: Displaying The Water Heater History

    Service program 12.4 Displaying the water heater history 12.7 Setting the service interval See Errata. The water heater history sub-menu is used to display the burning hours, the number of ignitions, the number interval (14.2 "Determining service interval") which of flame errors and the number of ignition errors. defines the frequency of maintenance by the service and maintenance engineer based on the number of Call up the menu for displaying the water heater...

  • Page 69: Setting Legionella Prevention

    Temporarily raising the setpoint during 12.9 Setting legionella prevention FULL LOAD PARTIAL LOAD To prevent infection with legionella bacteria, the water heater heats the water to 65 °C once per week, for 1 :>:SERVICE OPERATION. hour. This period is adjustable. By default, this period SERVICE OPERATION is set to Monday from 02:00 to 03:00 hours.
  • Page 70 Service program Instruction manual DR-FC...

  • Page 71: Errors

    Errors 13.1 Introduction A distinction is made between: • General errors General errors are not reported on the display. General errors are: Gas smell Display does not light up Insufficient or no hot water. Water leakage Explosive ignition. The manual includes (13.2 "Introduction") a table with general errors.

  • Page 72: Troubleshooting Table For General Errors

    13.2 Troubleshooting table for general errors Warning Maintenance may only be performed by a qualified service and maintenance engineer. General errors Indication Cause Measure Remark Gas smell Gas leak Warning Warning Close the main gas valve at once. Immediately contact your installation engineer or local gas company.
  • Page 73 Indication Cause Measure Remark Water leakage Leakage from a water Tighten the threaded connection If the leak persists, consult your installation engineer connection (threaded) Condensate leakage Check that the condensation water discharge is working properly. Rectify if necessary Leakage from another Trace the leak nearby water water heater or pipe segment...

  • Page 74: Troubleshooting Table For Displayed Errors

    13.3 Troubleshooting table for displayed errors Displayed errors Code + description Cause Measure Remark S01 (blocking error) Sensor is not (correctly) Connect the sensor lead to JP3 See the electrical diagram "Appendices"). connected Open circuit from Damaged cable and/or Replace the cable and/or sensor. To replace the necessary parts, you must contact your installation temperature sensor T defective sensor...
  • Page 75 Code + description Cause Measure Remark S11 (blocking error) Short circuit in sensor Replace the cable and/or sensor. To replace the necessary parts, you must contact your installation circuit engineer Short circuit in temperature sensor T at the bottom of the tank.
  • Page 76 Code + description Cause Measure Remark F01 (blocking error) Live and neutral Be sure to connect the live and neutral correctly (3.10 "Electrical See the electrical diagram "Appendices"). connected wrong way connection"); the water heater is phase-sensitive around. Defect in power supply circuit Condensation on the 1.
  • Page 77 Code + description Cause Measure Remark F03 (lock out error) Damaged wiring/Open 1. Check the wiring between the pressure switch and the If the error cannot be resolved or is persistent, contact your circuit installation engineer controller The pressure switch To replace the necessary parts, you must contact your installation 2.

  • Page 78: Value And Switching Pressure

    Code + description Cause Measure Remark F04 (lock out error) No gas 1. Open the main gas supply valve and/or the manual gas supply To restore the gas supply, contact your installation engineer valve before the gas control valve Three unsuccessful 2.
  • Page 79 Code + description Cause Measure Remark F06 (blocking error) Damaged cable in Check the wiring and the flame probe. Replace the wiring and/or If the error persists, contact your installation engineer. contact with metal flame probe if necessary. To replace the necessary parts, you must contact your installation surface or bent flame Short circuit between engineer...
  • Page 80 Code + description Cause Measure Remark C02 (lock out error) Incorrect reference 1. Reset controller. To replace the necessary parts, you must contact your installation voltage from the AD engineer 2. Check that the frequency of the power supply is converter.
  • Page 81 Code + description Cause Measure Remark E01 (blocking error) The temperature of the None. This is a temporary message that may appear from time to water at the top of the time, but will disappear automatically. tank is > 85 The temperature protection at the top of the tank has been...

  • Page 82: Warnings On The Display

    13.4 Warnings on the display Warnings on the display Indication Cause Measure Remark Maximum burning The actual burning Water heater runs, but displays a warning For maintenance to your water heater, please contact your hours: Service hours have exceeded installation engineer. required.

  • Page 83: Service Interval

    Service interval 14.1 Introduction A service should be carried out at least once a year, both on the water side and on the gas side. Among other things, the service interval depends on the water quality, the average burning time per day and the set water temperature. Note Regular maintenance extends the service life of the water heater.
  • Page 84 Service interval Instruction manual DR-FC...

  • Page 85: Performing Maintenance

    Performing maintenance 15.1 Introduction Caution Maintenance may only by carried out by an approved service and maintenance engineer. At each service, the water heater undergoes maintenance on both the water side and the gas side. The maintenance must be carried out in the following order.

  • Page 86: Water-Side Maintenance

    Performing maintenance The display will now show INTERNAL CHECK for about 10 seconds, and will then go to the main menu. MENU »OFF ^ ON È WEEK PROGRAM 7. Activate "ON mode" by going through the following steps: Press once on the blue arrow ( ) to position the cursor beside ON, then press Confirm the selection START OPERATION with 8.

  • Page 87: Gas-Side Maintenance

    IMD-0080 R1 1. Remove the cover plate (1) on the outer jacket (see the figure). 2. Undo the bolts. 3. Remove the cover and the gasket. 4. Inspect the tank and remove the loose scale deposits and contamination. 5. If the scale cannot be removed by hand, descale the water heater with a descaling agent.

  • Page 88: Finalizing Maintenance

    Performing maintenance 15.5 Finalizing To finalize the maintenance, carry out the following steps: maintenance 1. Fill the water heater "Filling"). 2. Start the water heater (9 "Starting the water heater") 3. Check the CO value (3.11.2 "CO -adjustment"). 4. Check the switching pressure of the pressure switch. (3.11.3 "Switching pressure measurement") 5.

  • Page 89: Warranty

    Warranty Contact your supplier for the warranty-conditons of this water heater. Instruction manual DR-FC...
  • Page 90 Warranty Instruction manual DR-FC...

  • Page 91: Appendices

    Appendices 17.1 Introduction This appendix contains: • Menu structure (17.2 "Menu structure") • Electrical diagram (17.3 "Electrical diagram") • Week program card (17.4 "Week program card") Instruction manual DR-FC...

  • Page 92: Menu Structure

    Appendices 17.2 Menu structure CONTROL SERVICE MAIN MENU PROGRAM HYSTERESE HYSTERESE DOWN HYSTERESE UP START OPERATION HISTORY CHANGE SETPOINT OF ERRORS APPLIANCE WEEK- HISTORY PROGRAMMA START OPERATION SELECT APPLIANCE PROGRAM OVERVIEW PUMP RELAY EXTRA PERIOD SERVICE INTERVAL SETTINGS SERVICE OPERATION LANGUAGE FULL LOAD DAY/TIME...
  • Page 93 Instruction manual DR-FC...

  • Page 94: Electrical Diagram

    Appendices 17.3 Electrical diagram Electrical diagram X J2 JP11 JP12 21 22 23 Primair Secundair 0309 361 R0 230VAC 50Hz 1 = brown, 2 = blue, 3 = yellow/green, 4 = black, 5 = white, 6 = grey / beige, 7 = green Instruction manual DR-FC...
  • Page 95 TERMINAL BLOCK CONNECTIONS: Earth Neutral Live input of controller Live input of isolating transformer (primary side) Live output of isolating transformer (secondary side) Live input of program-controlled pump COMPONENTS: Controller flame probe hot surface igniter Gas control valve Burner earth connection Extra ON mode switch Program-controlled pump Extra error signal connection...
  • Page 96 Appendices Instruction manual DR-FC...

  • Page 97: Week Program Card

    17.4 Week program card You can cut the week program card out and keep it near the water heater. Period TIME Tset Pump Period TIME Tset Pump ..°C ON / OFF ..°C ON / OFF ..°C ON / OFF ..°C ON / OFF ..°C ON / OFF...
  • Page 98 Instruction manual DR-FC...
  • Page 99 Index actuation 57 language setting 63 ambient conditions 17 liability 3 ambient temperature 18 maintenance connecting the air supply 27 condensation water discharge 85 connecting the chimney flue 27 descaling 84 connecting the circulation pipe 25, 26 gas-side 85 connecting the cold water side 25, 26 heat exchanger 85 connecting the hot water side 25 performing 83...
  • Page 100 Index water heater displaying history 66 water displaying specifications 64 composition 18 displaying the selection 66 setting the temperature 57 protection 15 types 9, 17 Instruction manual DR-FC 0309 429 1.3 UK...

This manual is also suitable for:

Dr-fc30Dr-fc95Dr-fc45Dr-fc120Dr-fc60Dr-fc80

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