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Servicing instructions - PDF
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1 Servicing instructions Condensing gas boiler WARNING! Improper installation, adjustment, alteration, service or maintenance can cause injury, loss of life or property damage. Refer to this manual. For assistance or additional information consult a qualified installer, service agency or the gas supplier. NOTICE! In the Commonwealth of Massachusetts this boiler must be installed by a licensed Plumber or Gas Fitter. Warning: If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death. Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other boiler. What to do if you smell gas Do not try to light any boiler Do not touch any electrical switch; do not use any phone in your building. Immediately call your gas supplier from a neighbor s phone. Follow the gas supplier s instructions. If you cannot reach your gas supplier, call the fire department. Installation and service must be performed by a qualified installer, service agency or the gas supplier. tice: This manual must be retained for future reference (11/2011) US/CA Logamax plus GB142-24/30/45/60 For installers Please read thoroughly before servicing2 Preface About these instructions These Servicing Instructions contain important information to diagnose and resolve issues concerning the GB142 boiler with capacities 24, 30, 45 and 60 kw. These Servicing Instructions are intended for specialist installers, who have the necessary training and experience for working on heating and gas systems. Subject to technical changes! Slight changes may be made to the illustrations, process steps and technical data as a result of our policy of continuous improvement. Updating of documentation Please contact us if you have any suggestions for improvements or corrections. 2 Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!3 Contents 1 Safety and general instructions Designated use Hazard definitions The following instructions must be observed Observe these instructions for heating system water Tools, materials and additional equipment Inspection Disposal Abbreviations 6 2 Regulations and guidelines 7 3 Product description 8 4 Operation Operating the BC10 basic controller General Menu structure of the BC10 basic controller "Flue gas test" menu "Service Mode" menu "Manual Operation" menu "Adjustments" menu 12 5 Function General Structure diagram "Function" Checking the supply/return/safety/hot-water temperature sensors Checking the hot-water temperature sensor Checking the supply/return/safety sensors cable Checking the hot surface ignitor; control Checking the hot surface ignitor; resistance Checking the hot surface ignitor; supply cord Testing the ionization current Checking the ionization electrode; cable Checking the ionization electrode; replace if necessary Checking the gas control valve; cable connections Checking the gas control valve; cable connection between gas control valve and UBA 3 installation base Ohming out the gas control valve Replacing the gas control valve Checking the control unit; connections to the boiler Bleed the gas supply pipe Measuring the inlet gas pressure (flow pressure) Measure and adjust the gas/air ratio Measuring the carbon monoxide content (CO) Transformer; replacing Automatic air purging system; replacing Burner; replacing Sight glass; replacing Condensate trap; replacing Pressure sensor; replacing Heat exchanger; replacing UBA 3; replacing Symptoms General Display codes on the display of the BC10 basic controller LED on the UBA Appendix Spare parts Diagnosis Faults without a fault code Faults with a fault code 46 8 Actions Testing, measuring, adjusting and replacing various components Checking the UBA 3 fuse; replace if necessary External connection board fuse Checking the fan unit; 120 VAC control Checking the fan unit; supply cord (120V AC) Checking the fan unit; tacho cable Replacing the fan unit 88 Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications! 34 1 Safety and general instructions 1 Safety and general instructions Please observe these instructions in the interest of your own safety. 1.1 Designated use The boiler was designed for heating water for a space heating system and generating hot water e.g. for domestic purposes. The boiler is delivered with a BC10 basic controller and the "Universal Automatic Burner Control Unit 3" (UBA 3) preinstalled. The boiler can be fitted with a modulating outdoor reset control AM10 (scope of delivery) and an On/Off thermostat or relay panel end switch (24 V) (accessories). 1.2 Hazard definitions The following defined terms are used throughout the documentation to bring attention to the presence of hazards of various risk levels. tices give important information concerning the life of the product. DANGER: Indicates the presence of hazards that can cause severe personal injury, death or substantial property damage. WARNING: Indicates the presence of hazards that can cause severe personal injury, death or substantial property damage. CAUTION: Indicates presence of hazards that can cause minor personal injury or property damage. CAUTION: Risk of electric shock. Indicates presence of hazards due to electric shock. NOTICE: Indicates special instructions on installation, operation or maintenance that are important but not related to personal injury or property damage. 1.3 The following instructions must be observed The boiler must only be used for its designated purpose, observing the Installation Instructions. Only use the boiler in the combinations and with the accessories and spares listed. Other combinations, accessories and consumables must only be used if they are specifically designed for the intended application and do not affect the system performance and the safety requirements. Maintenance and repairs must only be carried out by authorized professionals. You must report the installation of a condensing gas boiler to the relevant gas utility company and have it approved. You are only allowed to operate the condensing gas boiler with the combustion air/flue gas system that has been specifically designed and approved for this type of boiler. Please note that local permission for the flue system and the condensate water connection to the public sewer system may be required. You must also observe: the local building regulations stipulating the installation rules. the local building regulations concerning the air intake and outlet systems and the chimney connection. the regulations for the power supply connection. the technical rules laid down by the gas utility company concerning the connection of the gas burner fitting to the local gas main. the instructions and standards concerning the safety equipment for the water/space heating system. the Installation Instructions for building heating systems. The boiler must be located in an area where leakage of the tank or connections will not result in damage to the area adjacent to the boiler or to lower floors of the structure. When such locations cannot be avoided, it is recommended that a suitable drain pan, adequately drained, be installed under the boiler. The pan must not restrict combustion air flow. The boiler must be installed such that the gas ignition system components are protected from water (dripping, spraying, rain etc.) during boiler operation and service. The boiler must not be installed on carpeting. Do not restrict or seal any air intake or outlet openings. If you find any defects, you must inform the owner of the system of the defect and the associated hazard in writing. 4 Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!5 Safety and general instructions 1 DANGER if flammable gas explodes. Beware if you smell gas: there may be an explosion hazard! Warning: If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death. Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other boiler. What to do if you smell gas Do not try to light any boiler. Do not touch any electrical switch; do not use any phone in your building. Immediately call your gas supplier from a neighbor s phone. Follow the gas supplier s instructions. If you cannot reach your gas supplier, call the fire department. Installation and service must be performed by a qualified installer, service agency or the gas supplier. 1.4 Observe these instructions for heating system water Thoroughly flush the system prior to filling. Only use untreated main water to fill and top off the system. Do not use salt bedding exchangers to soften the water. Do not use inhibitors or other additives! Toxic chemicals such as used for boiler treatment, shall be introduced into the heating water used for space heating. The maximum permissible flow rate of the GB142-24/30 this is 11 GPM (gal./min.), for the GB is 15 GPM and for the GB is 20 GPM. When using oxygen-permeable pipes, e. g. for floor heating systems, you must separate the system using heat exchangers. Unsuitable heating system water promotes the formation of sludge and corrosion. This may damage the heat exchanger or affect its operation. 1.6 Inspection We advise you to offer your customer an annual inspection and maintenance contract. If inspection reveals that maintenance work is necessary you can carry this out as required in the Installation instruction of the boiler. Installation Periodically examine the venting systems and cleaning of the screens in the vent terminal. Also periodically inspect the low water cutoffs, including flushing of float types. And periodically inspect the burner flames (see page 8, fig. 1, pos. 10). Check the neutralization unit if present. Check to see if there are no obstructions to the flow combustion and ventilation air. For direct vent boilers, proper reassembly and resealing of the vent-air intake system is required. Maintenance Cleaning the heat exchanger, the burner and the condensate trap (see installation instructions, Maintenance). Checking the ionization signal (par , page 95) Checking and adjusting the gas/air ratio (par , page 108). 1.7 Disposal CAUTION: Check and clean the heating system at least once a year. Carry out a maintenance overhaul if necessary. Immediately repair defects to avoid damage to the heating system! Dispose of the boiler packaging in an environmentally sound manner. Dispose of components of the heating system (e. g. boiler or control device), that must be replaced, by handing them in to an authorized recycling facility. Keep boiler area clear and free from combustible materials, gasoline and other flammable vapors and liquids. 1.5 Tools, materials and additional equipment For the installation and maintenance of the boiler you will need the standard tools for central heating, gas and water fitting. In addition, a handtruck with a fastening belt is very useful. Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications! 56 1 Safety and general instructions 1.8 Abbreviations AM10 = Outdoor reset module AS = System fault code AV = Air Vent BC = Operating code BC10 = Control panel (on the boiler) BCT = Boulter Buderus cylinder thermostat BDV = Boulter Buderus diverter valve BKS = Blocking boiler fault code CB = Connection Block CH = Central Heating CHF = Central Heating Supply CHR = Central Heating Return CM10 = Cascade module CT = Cylinder Thermostat CWDO = Condensate water drainage outlet CM10 = Cascade module DHW = Domestic Hot Water DV = Diverter Valve E = Earth EM10 = External control module EMS = Energy management system FA = Outdoor sensor HK1 or HK2 = Central Heating line KIM = Boiler identification module L = Live Line LED = Light Emitting Diode LSV = Lock Shield Valve MCW = Mains Cold Water MM10 = Controler for HK2, second Central Heating line module. N = Neutal PE = Ground PL = Permanent hot line Prog = Programmer RT or RC = Room Thermostat SC = Service code T = Timer TRV = Thermostatic Radiator Valve ÜC = Other display codes UBA 3 = Universal automatic burner control unit 3 VKS = Locking boiler fault code WC = Wiring Centre WM10 = Controler for HK1, first Central Heating line ZV = Two Port Zone Valve 6 Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!7 Regulations and guidelines 2 2 Regulations and guidelines The installation must conform to the requirements of the authority having jurisdiction or, in the absence of such requirements, to the latest edition of the National Fuel Gas Code, ANSI Z In Canada, installation must be in accordance with the requirements of CAN/CSA B149.1, Natural Gas and Propane Installation Code. Where required by the authority having jurisdiction, the installation must conform to the Standard for Controls and Safety Devices for Automatically Fired Boilers, ANSI/ASME CSD-1. Install CO detectors per local regulations. The boiler requires yearly maintenance, see maintenance section see chapter Measuring the carbon monoxide content (CO) on page 109. Operating Limits of the boiler: Max. boiler temperature: Max. operating pressure: 220 F (105 C) 44 psi (3 bar) The hot water distribution system must comply with all applicable codes and regulations. When replacing an existing boiler, it is important to check the condition of the entire hot water distribution system to ensure safe operation. Massachusetts Installations Only: For direct- vent boilers, mechanical-vent heating boilers or domestic hot water equipment, where the bottom of the vent terminal and the intake is installed below four feet above grade the following requirements must be satisfied: 1) If there is not one already present, a carbon monoxide detector and alarm shall be placed in a living area outside the bedrooms. The carbon monoxide detector and alarm shall comply with NFPA 720 (2005 Edition). 2) A carbon Monoxide detector and alarm shall be located in the room that houses the boiler or equipment and shall: a) Be powered by in series on the same electrical circuit as the boiler or equipment: b) Have battery back-up power: c) Meet ANSI/UL 2034 Standards and comply with NFPA 720 (2005 Edition): d) Have been approved and listed by a Nationally Recognized Testing Lab: 3) A product-approved vent terminal must be used, and if applicable, a Product approved air intake must be used. Installation shall be in strict compliance with the manufacturer's instructions. A copy of the installation. 4) A metal or plastic identification plate shall be mounted at the exterior of the building, four feet directly above the location of vent terminal. The plate shall be of sufficient size to be easily read from a distance of eight feet away, and read "Gas Vent Directly Below". b) For direct-vent boilers mechanical-vent heating boilers or domestic hot water equipment where the bottom of the vent terminal and the intake is installed four feet or above grade the following requirements must be satisfied: 1) If there is not one already present, a carbon monoxide detector and alarm shall be placed in the living area outside the bedrooms, The carbon monoxide detector and alarm shall comply with NFPA 720 (2005 Edition). 2) A carbon monoxide detector shall: a) Be located inn the area where the boiler or equipment is located: b) Have battery back-up power: c) Be a minimum comply with NFPA 720 (2005 Edition). 3) A product-approved vent terminal must be used, and if applicable, a product-approved air intake must be used. Installation shall be in strict compliance with the manufacturer's instructions. A copy of the installation instructions shall remain with the boiler or equipment at the completion of the installation. Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications! 78 3 Product description 3 Product description fig. 1 Logamax plus GB142-24/30 (left) and GB142-45/60 (right) pos. 1: Drawer with control unit pos. 2: Universal Burner Automat (UBA 3) pos. 3: Control unit BC10 pos. 4: Gas valve pos. 5: Cover pos. 6: Flue measuring points pos. 7: Parallel flue pos. 8: Burner pos. 9: Latches of which two have locks pos. 10: Sighting glass pos. 11: Heat exchanger pos. 12: Back cover pos. 13: Air intake for the fan pos. 14: Fan pos. 15: Condensate trap and internal condensate drain flue gas pipe pos. 16: External Connection Board (under the cover) pos. 17: Pressure sensor fig. 2 Basic Controller Logamatic BC10 pos. 1: Main switch pos. 2: DHW temperature knob 1) pos. 3: LED "DHW status" pos. 4: Display pos. 5: Space heating water temperature knob pos. 6: LED "Heating system status" 9 8 pos. 7: pos. 8: pos. 9: Under the cover a RC system controller can be installed. LED "Burner Operation" Service Tool connector pos. 10: "Service" e button pos. 11: "Chimney sweep" d button pos. 12: "Reset" c button 7 1) ECO mode means that the temperature inside the hot water tank is 140 F (60 C), with a hysteresis (ΔT) of 18 F instead of 9 F 8 Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!9 Operation 4 4 Operation 4.1 Operating the BC10 basic controller General The boiler is equipped with an control unit, the basic controller BC10. The BC10 allows you to operate the boiler. Briefly press on the control panel cover to open it (see fig. 3). The basic controller BC10 (see fig. 2) is located on the left side in the drawer. On the right side of the drawer there s space for a RC control unit Switching the heating system on and off Switching on the heating system Set the main switch on the BC10 basic controller to position "1" (On). Switching off the heating system Set the main switch on the BC10 basic controller to position "0" (Off). fig. 3 Opening the control panel 4.2 Menu structure of the BC10 basic controller The menu structure of the boiler can be viewed on the BC10 using the "Reset" c, "Chimney sweep d" and "Service e" (see fig. 2, pos. 9, 10 and 11) buttons and the display indication (see fig. 2, pos. 4). The menu structure consists of 4 menus, schematically represented on the following pages using structure diagrams: "Flue gas test" menu (page 10) "Service Mode" menu (page 11) "Manual Operation" menu (page 12) "Settings" menu (page 12). Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications! 910 4 Operation "Flue gas test" menu "FLUE GAS TEST" MENU 72 Current supply temperature F ( C). See page 20. Activate flue gas test? no yes Activate flue gas test: Press and hold the chimney sweep button 2 to 5 seconds. 72. The flue gas test is activated as soon as a dot is visible in the lower right hand corner of the display. This means that the boiler runs in heating mode at 100 % for 30 minutes. The maximum boiler water temperature as set on the BC10 basic controller applies here. Press the service button. P2 9. psi Current heating system pressure. See page 20. Press the service button. A. Operating code. See page 21. Press the service button. 72. Current supply temperature F ( C). See page 20. Have 30 min. passed or was the power interrupted? yes no no Deactivate flue gas test? yes Deactivate flue gas test: Press and hold the chimney sweep button for more than 2 seconds, until the decimal point has disappeared. 10 Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!11 Operation "Service Mode" menu "SERVICE MODE" MENU 72 Current supply temperature F ( C). See page 20. Activate service mode? no yes Boiler load in line with "Settings" menu. Activate service mode 1st step: Press and hold the "Chimney sweep" button for 2 to 5 seconds. 72. As soon as a non-flashing dot is shown in the right-hand bottom corner of the display, the boiler will run in heating mode at 100 % load for 30 minutes. The maximum boiler water temperature set on the BC10 basic controller applies. + Activate service mode 2nd step: Simultaneously press and hold the "Chimney sweep" and "Service" buttons for more than 2 seconds. L. Current boiler load. See page 20. Service mode activated. You can now temporarily lower the boiler load to partial load to check, and if relevant set the gas/air ratio or the ionization current. - Press and hold the "Reset" button until the display shows "L30." P2 9. psi Current heating system pressure. See page 20. Press the "Service" button. A Operating code. See page 46.. L 30. Current boiler load. See page 20. The boiler will reduce its load to 30 % within a couple of seconds. The maximum boiler water temperature as set on the BC10 basic controller applies. Check the gas/air ratio (see page 108) or the ionization current (see page 95) and adjust the gas/air ratio if necessary. Press the "Service" button. 72. Current supply temperature F ( C). See page 20. Have 30 min. passed or was the power interrupted? yes Press the "Service" button. 72. Current supply temperature F ( C). See page 20. Press the "Service" button. no Deactivate service mode? yes Deactivate service mode: Press and hold the "Chimney sweep" button for more than 2 seconds until the decimal point has disappeared. no Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications! 1112 4 Operation "Manual Operation" menu "MANUAL OPERATION" MENU 72 Current supply temperature F ( C). See page 20. Activate manual operation? no yes To activate manual operation: Press and hold the "Chimney sweep" button for more than 5 seconds. 72. As soon as a flashing dot is shown in the righthand bottom corner of the display, manual operation is active. The means that the boiler is permanently in heating mode. The maximum boiler water temperature as set on the BC10 basic controller now applies. The "Heat request" LED is lit. Press the "Service" button. P2 9. psi Current heating system pressure. See page 20. Press the "Service" button. H. Operating code. See page 20. During manual operation the "Adjustments" menu on page 12 can be used to temporarily change the required boiler load in case of an emergency. Press the "Service" button. 72. Current supply temperature F ( C). See page 20. no Power interrupted? no Deactivate manual operation? yes yes Deactivate manual operation: Press and hold the "Chimney sweep" button for more than 2 seconds until the flashing decimal point has disappeared "Adjustments" menu 12 Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!13 Operation 4 "ADJUSTMENTS" MENU 72 Current supply temperature F ( C). See page 20. Open the Adjustments menu? + yes Open programming mode: Simultaneously press and hold the "Chimney sweep" and "Service" buttons for more than 2 seconds. no Boiler load and pump post purge time settings confirmed. L As soon as the display shows "L--", the programming mode is open. The first parameter shown on the display is used to set the boiler load for heating operation. yes, lower - Adjust the boiler load with the "Reset" button. Adjust boiler load? no yes, higher + Adjust the boiler load with the "Chimney sweep" button. L30 The setting "L30" means that the heating load is lowered to 30 %. L L is the maximum heating load setting of 100 %. Factory default setting: "L " = 100 %. Press the "Service" button. F 5 As soon as the display shows "F ", the second parameter can be set. This parameter indicates the pump post purge time. yes, lower - Adjust the pump post purge time with the "Reset" button. Adjust pump post purge time? no yes, higher + Adjust the pump post purge time with the "Chimney sweep" button. F00 "F00" is the minimum pump post purge time setting in minutes. "F60" is the maximum pump post purge time setting in minutes. F 1d "F1d" is the maximum pump post purge time setting for one day. Factory default setting "F 5" = 5 minutes. Have at least 5 min. passed without a button being pressed or was the power supply interrupted? yes no Press the "Service" button. Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications! 1314 5 Function 5 Function 5.1 General To clarify the operation of the Logamax plus GB142-24/30/45/60 thermal power gas boilers under normal operating conditions, the work steps are schematically represented in the structure diagrams on the following pages of this chapter. 14 Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!15 Function Structure diagram "Function" 1 Start up Connect the heating system to the power grid by turning the circuit breaker ON. Turn the main switch on the BC10 to position 1 (ON), see page 8, fig. 2. The LED of the UBA 3 lights for 1 second. This means that the UBA 3 is reading the KIM. If a new KIM or UBA 3 has been installed, the LED will flash at a high frequency for max. 10 sec. while data is being exchanged A display check is carried out (for max. 1 second). Flashes twice for 2 seconds until communication between the UBA 3 and the BC10 has been established. 72 Current supply temperature F ( C). See page 20. 0U Operating code. The heating boiler is started. Press the "Service" button. Start of air-side pre-flushing phase. The blower runs for < 20 seconds at approx. 60 % of the maximum speed. P 2 9 psi Current heating system pressure. See page 20. Is the air purging phase okay? no Unit will show an error code. Fault must be fixed before proceeding. See chapter 6, 7 and 7.2. Press the "Service" button. 2 yes page 16 Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications! 1516 5 Function page H Operating code. The boiler is in ready mode, there is no heat request. Start of pump post purge time via the heating system. Pump post purge time in line with "Settings" menu. See page 12 and page 20. Factory default setting: 5 minutes. Has the pump post purge time expired? yes no Is the temperature in the hot water tank at least no 9 F (5 K)lower than the temperature set on the BC10 or RC? Is there a heat request from the room or outdoor temperaturedependent regulator? no The primary circulation pump stops. 3 yes 6 yes 5 page 18 page 17 page 19 Has the primary circulation pump been off for more than 24 hours? no Is the temperature in the hot water tank at least 9 F (5 K) lower than the temperature set on the BC10 or RC? no Is there a heat request from the room or outdoor temperaturedependent regulator? no yes yes yes The primary circulation pump is run for 10 seconds to prevent it from seizing up. 3 6 page 17 page 19 Have ten seconds passed or was the power supply interrupted? yes no Is the temperature in the hot water tank at least 9 F (5 K) lower than the temperature set on the BC10 or RC? no Is there a heat request from the room or outdoor temperaturedependent regulator? no yes yes 3 6 page 17 page Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!17 Function 5 page 16 3 The "Hot water mode" LED on the BC10 is lit. 0C The blower is started up. The tank filling pump is activated. The hot surface ignitor is activated for seven seconds. The primary circulation pump is started. 0L Ignition phase: The gas valve is opened. 7 page 19 no H GB142 is in the hot water mode. The "Burner" LED is lit. Is the supply temperature 82.8 K higher than the hot water temperature setting or higher than 200 F (93 C)? Is the temperature in the hot water tank higher than the hot water temperature setting in the BC10 or RC control device? yes no 0Y yes The gas valve is closed, the burner is shut down. The "Hot water mode" LED goes off. The "Burner" LED goes off. 4 The blower stops. page 18 no Is the supply temperature lower than the preset hot water temperature plus 63 F (35 K)? yes Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications! 1718 5 Function page A The gas valve is closed, the burner is shut down. The "Burner" LED goes off. Start the pump over-run time through the hot water tank at least 30 seconds, max. 1 minute, if there is a heat request. Air-side after-purging by blower for 30 seconds. The blower stops. 0H The primary circulation pump stops. The tank filling pump is stopped. Is there a heat request from the room or outdoor temperature-dependent regulator? 6 yes no 5 page 16 page Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!19 Function 5 page 16, page 18 6 The "Heat request" LED is lit. 0C The blower is started up. The hot surface ignitor is activated for seven seconds. The circulation pump is started up. 0L Ignition phase: The gas valve is opened. H The GB142 enters heating mode. The "Burner" LED is lit. Is the temperature in the hot water at least 9 F (5 K) lower than the temperature set on the BC10 or RC? no Is the room or outdoor temperaturedependent regulator in the request position? no yes yes 7 page 17 no Is the supply temperature 11 F (6 K) higher than the target value? (The target value is calculated by the outdoor temperature-dependent regulator or is set - in the event of room temperature-dependent regulation- on the BC10) The "Heat request" LED goes off. 0H The gas valve is closed, the burner is shut down. 0Y The gas valve is closed, the burner is shut down. The "Burner" LED goes off. The "Burner" LED goes off. Start of pump post purge time via the heating system. Pump post purge time in line with "Settings" menu. See page 12 and page 20. Factory default setting: 5 minutes. Air-side after-purging by blower for 30 seconds. The primary circulation pump stops. no The blower stops. Is the supply temperature 11 F (6 K) lower than the target value? yes The blower stops. 5 page 16 Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications! 1920 6 Symptoms 6 Symptoms 6.1 Display indication on the BC10 basic controller General A display value or code is shown on the display of the BC 10 basic controller (see page 8, fig. 2) Display values on the display of the BC10 basic controller The display value is shown automatically or can be called up by pressing the "Chimney sweep d" or "Service e" button (see page 10 and 12. The following display values can be shown on the display of the BC10 basic controller: Display value Type of display value Unit Range [\/7/2 Current supply temperature F [\/\/0 [l/9/9 1) / Factory default setting C [-/1/8 [\/9/3 [p/2/9 Current heating system pressure psi [p/0/0 [p/2/9 / [l/9/9 Configured target load % [l/3/0 [l/9/9 / [l/?/? [l/?/? [f/\/5 Configured target pump post purge time min [f/0/0 [f/6/0 / [f/1/d [f/\/5 table 1 Display values on the BC10 basic controller Display codes on the display of the BC10 basic controller A display code shows the current status of the Logamax plus GB142. The display value is shown automatically or can be called up by pressing the "Service e" button. Two display codes (see table 2 level 3 and level 4) are shown. After the first display code (level 3) is displayed, the second one (level 4) can be called up by pushing the Service e button. On the BC10 basic controller level 4 can only be called up in the event of a fault code. Under normal operating conditions it is only possible to call up level 4 using the RC control device or a service tool. If the display code is a fault code, this fault code either flashes (locked fault code) in the display or it is shown permanently (blocking fault code). A boiler reset is only necessary with a locking fault code (flashing) (see 8, fig. 2). The cause of the fault must be remedied first. The cause has to be remedied and the boiler resumes regular operation. In the event of a locking boiler fault code both the display value and the display code flash. If there are more than once display codes at the same time, the display codes will be shown in turn. And if one of these display codes is a locking display code, the blocking display codes shown will also flash. 20 Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications! View more
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