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Buderus Logano GB125 BE Installation And Maintenance Instructions Manual

Oil condensing boiler
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Installation and
Maintenance Instructions
Logano GB125 BE US/CA
Oil condensing boiler
CAUTION!
Observe the safety instructions of this installation
and maintenance manual before placing the boiler
in operation.
DANGER!
If installation, adjustment, modification, operation or
maintenance of the heating system is carried out by
an unqualified person, this may result in danger to
life and limb or property damage.
The directions of this installation and maintenance
manual must be followed precisely.
If you require assistance or further information, con-
tact a qualified installer or an appropriate service
provider.
CAUTION!
The operating manual is a component of the techni-
cal documentation and must be handed over to the
operator of the heating system.
Discuss the instruction in this manual with the ow-
ner or operator of the heating system to ensure that
they are familiar with all information required for
operation of the heating system.
For contractors
Please read carefully prior
to installation and servicing.

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Summary of Contents for Buderus Logano GB125 BE

  • Page 1 Discuss the instruction in this manual with the ow- ner or operator of the heating system to ensure that they are familiar with all information required for operation of the heating system. Logano GB125 BE US/CA For contractors Please read carefully prior to installation and servicing.

  • Page 2: Table Of Contents

    Mounting the drain valve (included with B-kit) 5.4.3 Installation of system components Spare parts Filling the heating system and checking for leaks Wiring diagrams Connecting the fuel supply Bleed off condensate Index Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 3: Safety Instructions And Explanation Of Symbols

    B Maintain a clearance of 16 inches (40.6 cm) from the boiler. Combustion air B Keep the supply of combustion air free of corrosive substances (e.g. halogenated hydrocarbons that contain chlorine or fluorine compounds). This will help prevent corrosion. Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 4: Explanation Of Symbols

    B Use only genuine spare parts. Damage caused by the Notesare identified in the text by this symbol. use of parts not supplied by Buderus is not covered by They are separated by horizontal lines above the Buderus warranty.

  • Page 5: Product Description

    DHW installations. supply • The regulations and standards relating to the safety This boiler must only be installed with one of the Buderus systems for the water heating system supplied concentric supply air and flue gas routing systems.
  • Page 6 Fig. 1 Boiler with burner Control panel Boiler casing Boiler block with thermal insulation Burner hood Burner Fig. 2 Rear view with heat exchanger (thermal insulation not shown) Heat exchanger system Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 7: Boiler Water Quality

    Oil burner with factory- The following may also prove useful: installed burner door • Hand truck with securing strap or Buderus boiler cart Air supply hose, factory- • Wood battens installed • Cleaning brushes and/or chemical cleaning agent for...

  • Page 8: Dimensions And Specifications

    Example: manual reset high limit (STB) = 212 °F, maximum possible supply temperature = 212 - 32 = 180 °F The safety limit must comply with the requirements applicable in your country. Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 9: Conditions For Operation

    2) If the control panel does not influence the heating zones or a heating zone actuating component (e.g. Pumplogic), the burner ON mode must reach an operating temperature of 122 °F within 10 min by restricting volume flow. Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 10: Conditions For The Boiler Room And The Environment

    The heating system may only be filled and topped up with water of domestic water qual- ity. We recommend a pH level of 8.2 – 9.5. Tab. 8 Hydraulics and water quality Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 11: 2.10 Disposal

    B Dispose of boiler packaging in an environmentally- responsible manner. B All heating system components that have to be replaced should be disposed of in environmentally- responsible manner at an authorized disposal site. Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 12: Moving The Boiler

    B Unscrew two hex bolts at the sides. B Open the boiler door. B Lift the burner door off its hinges. 7 747 019 141-04.1RS Fig. 5 Removing the burner door Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 13: Lifting And Carrying The Boiler

    The boiler trolley can also be used to facilitate Fig. 7 Moving the boiler with a boiler hand truck work on the underneath of the boiler, e.g. fitting the adjustable feet ( Chapter 4.3, page 16). Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 14: Placing The Boiler

    B Make sure that there is a sufficient clearance between combustible materials and the chimney connection as specified by NFPA 31 (distance of 18 "). B The floor must comply with the requirements of NFPA 31. Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 15: Reversing The Burner Door

    7 747 019 141-09.1RS Fig. 10 Reversing the burner door (door attachments) Hex bolts Hinge barrels Burner door Hinges Heat exchanger baffle plates Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 16: Mounting The Adjustable Feet (Included With B-Kit)

    B Level the boiler by rotating the adjustable feet as required and using a level. Protect boiler connections from damage and dirt if the boiler is not to be installed immediately. 7 747 019 141-11.1RS Fig. 12 Leveling the boiler Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 17: Installing The Boiler

    The GB125 boiler is approved for zero (0") clearance between its concentric vent pipe and combustibles. Because of the tight construction of modern houses, this boiler must draw all air supply for combustion from outside (RLU). Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 18: Test Ports

    Follow the directions in the instructions for the Logatop BE oil burner. 6 720 649 309-03.1ITL Fig. 13 Installing the flue/air connector (included with the venting system) Air intake test port Flue gas test port Logano GB125 BE US/CA - Subject to technical modifications.
  • Page 19 2 ft from outside corners of buildings. 7. If there is a fan-assisted air intake vent within 10 ft, the termination must be at least 3 ft above it. Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 20: Installation Options

    Table 12, page 21 shows the maximum permissible vent length for the different types of systems. Logano GB125 BE US/CA - Subject to technical modifications.
  • Page 21 Instructions for the different flue gas systems. Pipe changes of direction The overall lengths apply for systems with one elbow. Every additional elbow (accessory) reduces the maximum vent length by 3 ft (1 m). Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 22: Making The Water Connections

    (optional) in the boiler return connection to reduce build-up of debris on the water side. Fig. 16 B-kit Installation 90° 1 ¼" NPT elbow Double nipple Supply manifold Pressure/temperature gauge Safety valve 90° ¾" NPT street elbow Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 23: Mounting The Drain Valve (Included With B-Kit)

    Air eliminator (in main supply) Heating pump Check valve (back flow preventer) Diaphragm expansion vessel Automatic feed valve Check valve (back flow preventer) Purge station Water supply Supply Draining Boiler return Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 24: Filling The Heating System And Checking For Leaks

    B Isolate the expansion tank from the system by closing the valve. B Open the mixing and shut-off valves on the heating water (primary) side. B Slowly fill the boiler with tap water. Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 25: Connecting The Fuel Supply

    NPT adapter (G 3/8" (60) x 1/4" NPT) Vacuum gauge Mounting bracket Bleed off condensate Ensure that the siphon and piping are installed that fluids drain away freely, and backup into the boiler is prevented. Logano GB125 BE US/CA - Subject to technical modifications.
  • Page 26 B Check the siphon fluid level regularly and fill with water if needed. B Fill the siphon with water through the service cover [3]. Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 27: Electrical Supply Connections

    B Slide the control panel forward towards the burner door. B Snap the flexible catches [1] into place in the knock- outs provided [4]. 7 747 019 141-21.1RS Fig. 24 Installing the control panel Flexible catches Tabs Slots Knock-outs Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 28: Installing The Temperature Sensor Assembly

    B Connect the burner cable [4] to the control panel as indicated by the terminal markings. Fig. 26 Routing and connecting cables Cable entry in the front boiler cover Capillary tube and sensor cable Sensor well Burner cable Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 29: Power Connection And Connections Of

    B Connect green burner plug in the socket labeled "Brenner". The manual reset high limit (STB) arrives tripped and must be reset before commissioning. Fig. 29 Connecting the manual reset high limit (STB) to the control panel Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 30: Installing Cable Strain Relief

    B Place the control panel cover [1] in position and secure with screws. B Install the rear boiler top panel [2]. Fig. 31 Installing the rear boiler cover Control panel cover Rear boiler cover Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 31: 6 Starting Up The Heating System

    WARNING: Health risk from contaminated domestic water! B Observe all national standards and regulations regarding prevention of domestic water contamination (e.g. by water from heating systems). B Bleed the heating system while filling. Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 32: 6.2 Testing Safety Valve

    Preparing the heating system for operation B Open the fuel supply at the main shut-off valve. B Switch on the heating system emergency shut-off switch and/or the appropriate circuit breaker. Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 33: Starting Up The Control Panel And The Burner

    ( Fig. 13, page 18). B Make all additional measurements according to the burner documentation. 7 747 019 141-29.1RS Fig. 35 Pressure test port on burner door Pressure test port Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 34: Checking The Manual Reset High Limit (Stb)

    B Secure the burner hood with the two screws at the sides. DANGER: Risk of fatal injury from electric shock! B Only operate the boiler with the burner hood installed. Fig. 36 Installing the burner hood Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 35: Commissioning Log

    Inform operator, hand over technical documentation Confirm properly-completed servicing Company stamp/signature/date Tab. 14 Inform the customer about the correct fuel and correct operating pressure. Enter the details in the table ( boiler operating instructions). Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 36: Shutting Down The Heating System

    B Turn off the main isolating fuel valve. B Disconnect the heating system from the electrical Fig. 38 Heating system emergency shut-off switch power supply by means of the emergency shut-off switch or the appropriate circuit breaker. Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 37: Heating System Inspection

    B Shut down the heating system. Chapter 7.1, page 36) B Remove burner hood from boiler. Chapter 3.1, page 12). B Disconnect electrical power to burner. Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 38: Cleaning The Boiler

    Flue gas baffles in the heat exchanger B Clean the hot gas passages by turning the round cleaning brush. 7 747 019 141-37.1RS Fig. 40 Brushing out the hot gas flues Logano GB125 BE US/CA - Subject to technical modifications.
  • Page 39 B Heat the boiler to a temperature of at least 160 °F. B Shut down the heating system. B Brush out the heat exchanger heater. B Start up the heating system again (see above). Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 40: Cleaning The Heat Exchanger System

    Only remove the strap around the bottom of the secondary condensing heat exchanger on the GB125/30 and 35 if instructed by a technician. Fig. 43 Opening up the heat exchanger system Quick-release catches Cleaning cover Thermal insulation Logano GB125 BE US/CA - Subject to technical modifications.
  • Page 41 CAUTION: Risk of system damage from corrosion and short-circuit! B When wet cleaning protect electrical components including the manual reset high limit (STB) from moisture and chemicals. Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 42: Cleaning The Neutralizing System And Trap

    B Place a collection vessel under the connector on the condensate pan. B Flush the condensate pan (wet cleaning) through the heat exchanger system (Chapter 8.4 page 40). Logano GB125 BE US/CA - Subject to technical modifications.
  • Page 43 B Insert float body [3] and reinstall cap [1] with gasket B Clean the float body compartment. [2]. Ensure that the float moves freely in the float body. 6 720 649 309-13.2ITL Fig. 47 Overview of siphon versions Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 44: Checking The Air Supply Hose

    WARNING: Health risk from contaminated domestic water! Observe all national standards and regulations regarding prevention of domestic water contamination (e.g. by water from heating systems). Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 45: Test Safety Valve

    8.10 Air supply system B If the CO /CO levels are too high, check the air supply system for blockages. Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 46: 8.11 Inspection And Maintenance Reports

    Check control panel settings ( control panel documentation) Record the final checks of the inspection work, incl. measurements and test results Confirm properly-completed servicing Company Company Company stamp/signature stamp/signature stamp/signature Tab. 15 Inspection log book Logano GB125 BE US/CA - Subject to technical modifications.
  • Page 47 Tab. 16 Inspection log (continued) If any condition requiring maintenance work is identified in the course of inspection, that work must be carried out as required. Logano GB125 BE US/CA - Subject to technical modifications.
  • Page 48 Date:______ Date:______ Date:______ Date:______ Date:______ Company stamp/ Company stamp/ Company stamp/ Company stamp/ Company stamp/ Company stamp/ Company stamp/ signature signature signature signature signature signature signature Tab. 18 Maintenance log (continued) Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 49: Troubleshooting

    B Rectify the fault immediately and restart the heating system. B If this is not possible, protect your heating system against freezing by draining the boiler, the heating system and hot water pipes at the lowest point. Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 50: 10 Examples Of Installations

    Diaphragm expansion vessel Safety valve air eliminator Heating pump Thermostat Hot water pump Water compensation pipe (diversion) bypass DHW Recirculation pump Tab. 19 Fig. 51 Multiple zones with zone valves Radiators Logano GB125 BE US/CA - Subject to technical modifications.
  • Page 51 Examples of installations Fig. 52 Multiple heating circuits with heating pumps Radiators Fig. 53 Multiple heating zones with bypass for heating systems with large water capacity Radiators Bypass boiler Logano GB125 BE US/CA - Subject to technical modifications.
  • Page 52 Examples of installations Fig. 54 Multiple heating circuits with heating pumps and motorized mixing valve Radiators Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 53: 11 Spare Parts

    Sealing compound, brown (310 ml cartridge) for 63014361 gluing sealant rope Infeed piece G11/4-28 GB125 V2 – 87185710550 Infeed piece G11/4-22 GB125 V2 7747030540 – – Tab. 20 Boiler block and burner door Logano GB125 BE US/CA - Subject to technical modifications.
  • Page 54 Mounting material for boiler block G115/125 WS 63031288 O-ring 44x3 set (5 pieces) 7747031427 Pressure testing nozzle M6 SW 10 V2 63032101 B-Kit G115/G125 WS 63029762 Tab. 20 Boiler block and burner door Logano GB125 BE US/CA - Subject to technical modifications.
  • Page 55 Spare parts 7747102254.ab.RS-Kesselblock und Brennert r GB125 US Fig. 55 Boiler block and burner door Logano GB125 BE US/CA - Subject to technical modifications.
  • Page 56 Air hose Santo SLDN63 L1450 63024885 Corrugated hose clip 60/80 mm 63024917 Flue gas manual reset high limit STB complete 7747026825 Outer panel fixings G115, G125 63031847 Burner BE1.2/1.3-2.2/2.3 Tab. 21 Boiler casing Logano GB125 BE US/CA - Subject to technical modifications.
  • Page 57 Spare parts 7747102255.ac.RS-Verkleidung GB125 US Fig. 56 Boiler casing Logano GB125 BE US/CA - Subject to technical modifications.
  • Page 58 Siphon with float 7747020450 Inlet connection, siphon set GB125 7747019787 Extension G1 1/4x120 7747026385 O-ring 44x3 7747031427 Extension G1x120 7747026384 O-ring 35x3 7747027431 Siphon mounting bracket V2 7747030548 Tab. 22 Heat exchanger WT Logano GB125 BE US/CA - Subject to technical modifications.
  • Page 59 87185702230 Spring clip d=32.6/22 7747030542 – – Spring clip d=38.2/28 – 87185710560 Spring plug D26 7747030559 Spacer sleeve 17.2x2.1 87185708250 Siphon gasket set GB125 SB105 7747016504 Tab. 22 Heat exchanger WT Logano GB125 BE US/CA - Subject to technical modifications.
  • Page 60 Spare parts 6 720 649 309-12.1ITL Fig. 57 Heat exchanger Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 61: 12 Wiring Diagrams

    Wiring diagrams 12 Wiring diagrams Fig. 58 Wiring diagram Logano GB125 BE US/CA - Subject to technical modifications.

  • Page 62: Index

    ..............Wet cleaning ........Installing the burner door jacket ..........Installing the control panel ....... Installing the temperature sensor assembly ..............Line voltage ............Log, commissioning ........Logs, inspection and maintenance Logano GB125 BE US/CA - Subject to technical modifications.
  • Page 63 Notes Logano GB125 BE US/CA - Subject to technical modifications.
  • Page 64 United States and Canada Bosch Thermotechnology Corp. 50 Wentworth Avenue Londonderry, NH 03053 Tel. 603-552-1100 Fax 603-584-1681 www.buderus.us U.S.A. Products manufactured by Bosch Thermotechnik GmbH Sophienstrasse 30-32 D-35576 Wetzlar www.buderus.com Bosch Thermotechnology Corp. reserves the right to make changes without notice due to continuing...

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