Bosch Condens 8300i W Installation And Maintenance Instructions Manual
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Bosch Condens 8300i W Installation And Maintenance Instructions Manual

Wall mounted gas condensing boiler
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Installation and maintenance instructions for specialists
Wall mounted gas condensing boiler
Condens 8300i W
GC8300iW 25 P | GC8300iW 35 P

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Summary of Contents for Bosch Condens 8300i W

  • Page 1 Installation and maintenance instructions for specialists Wall mounted gas condensing boiler Condens 8300i W GC8300iW 25 P | GC8300iW 35 P...

  • Page 2: Table Of Contents

    Pre-Commissioning checks ..... . 21 Filling the appliance and adding Inhibitor... 22 Condens 8300i W – 6721841533 (2022/12)
  • Page 3 Electrical Wiring .......56 13.8 Commissioning report for the appliance... .58 Condens 8300i W – 6721841533 (2022/12)

  • Page 4: Explanation Of Symbols And Safety Instructions

    ▶ Before touching live parts: Wait at least 5 minutes to discharge the liability. capacitors. Service work required to repair the damage will be invoiced. ▶ Observe the wiring diagrams of other system components as well. Condens 8300i W – 6721841533 (2022/12)

  • Page 5: Product Information

    The CE marking declares that the product complies with all the applicable EU legislation, which is stipulated by attaching this marking. The complete text of the Declaration of Conformity is available on the Internet: www.bosch-climate.com.au/ www.bosch-climate.co.nz. Condens 8300i W – 6721841533 (2022/12)

  • Page 6: Product Identification

    Wall thickness S K [mm] for Ø flue accessories [mm] Ø 60/100 Ø 80 Ø 80/125 15–24 cm 24–33 cm 33–42 cm 42–50 cm Table 2 Wall thickness S depending on the diameter of the flue accessories Condens 8300i W – 6721841533 (2022/12)
  • Page 7 With horizontal flue gas routing, the elbow must be kept in a free space of 100 mm. ≥ 5* ≥ 5* " R " R1" " R " 0010041297-002 Fig. 3 Front view (mm) Recommended 100 mm Condens 8300i W – 6721841533 (2022/12)

  • Page 8: Product Overview

    Product Information Product overview 0010031705-003 Fig. 4 Product overview Condens 8300i W – 6721841533 (2022/12)

  • Page 9: Regulations

    CE approval. [17] Flame sense electrode This is why we recommend using Bosch original accessories. [18] Heating block temperature limiter You can find designations and part numbers in the main catalogue.

  • Page 10: Flue Terminal Positions

    • to check the required cross-section between the flue and duct • Terminals must be positioned so to avoid combustion products (secondary ventilation) for safe operation of the combustion system, entering the building. and to clean it. ▶ Observe local standards and regulations. Condens 8300i W – 6721841533 (2022/12)

  • Page 11: Vertical Flue Gas Routing Through The Roof

    For detailed information on calculating the length of a flue system refer to the technical guide. 0010030889-003 Fig. 8 Vertical concentric flue system Allowed maximum length GC8300iW 25 P Accessory Ø Maximum pipe length L [mm] Ø 60/100 Ø 80/125 Table 8 Flue routing Condens 8300i W – 6721841533 (2022/12)

  • Page 12: Preconditions For Installation

    3 bar (300 kPa). Surface temperature • Bosch recommends that thermostatic radiator valves (TRVs) be used The maximum surface temperature of the appliance is below 85 °C. on all radiators within the sleeping accommodation but not the Therefore no special safety measures are required to protect flammable radiator where the room thermostat is sited.

  • Page 13: System Fill

    A washing machine waste pipe or bifurcated pipe, etc. can also be used. A self sealing device should be incorporated in the drainage path, if possible, in an upright position. A tundish should be used as a suitable air gap just before the self sealing Condens 8300i W – 6721841533 (2022/12)

  • Page 14: Heating

    Heating water additives, e.g. corrosion inhibitors, are only required in the case of constant oxygen ingress, which can not be prevented through other means. Sealants in the heating water can cause deposits in the heat exchanger. We therefore advise against their use. Condens 8300i W – 6721841533 (2022/12)

  • Page 15: Installation

    ▶ Only use screws and rawl plugs that are suitable for the wall type and weight of the unit. Condens 8300i W – 6721841533 (2022/12)
  • Page 16 ▶ Affix an installation template (if available) to the wall. ▶ Check whether the screws and rawl plugs supplied with the device can be used. ▶ Drill suitable holes for the selected rawl plugs and screws. Condens 8300i W – 6721841533 (2022/12)

  • Page 17: Installing The Appliance

    ▶ Unlock the condensate trap and remove from appliance ( Fig. 9.15, p. 42) ▶ Check the positioning of the sealing washers on the pipe connections. ▶ Tighten the union nuts on the pipe connections starting with the CH return on the right. Condens 8300i W – 6721841533 (2022/12)

  • Page 18: Connecting The Flue Accessories

    ▶ Connect the connections for the cylinder flow and cylinder return with a short-circuit line (accessory). 0010042916-001 Fig. 23 ▶ Align the seal [1] with the holes and stick it onto the housing of the appliance. Condens 8300i W – 6721841533 (2022/12)

  • Page 19: Electrical Connection

    ▶ Flip down the control device ( Fig. 25). 0010019569-002 Fig. 25 Opening the cover When the cover is open, there is access to the electrical connection of the control panel. Condens 8300i W – 6721841533 (2022/12)
  • Page 20 ▶ Set hydraulic configuration heating circuit 1 with service function 2-A3 to 2. Power supply for cylinder primary ▶ Set service function 2-A2. pump (max. 100 W) or external 3-way valve (with spring return) Cylinder temperature sensor connection Condens 8300i W – 6721841533 (2022/12)

  • Page 21: Commissioning

    If the appliance is not to be commissioned immediately then, after successfully completing all of the checks and any rectification work: ▶ Isolate the electricity supply. ▶ Isolate the gas supply. ▶ Close the water shut-off valves to the appliance. ▶ Label appropriately. Condens 8300i W – 6721841533 (2022/12)

  • Page 22: Filling The Appliance And Adding Inhibitor

    Pressure shown on this gauge should not be compared to readings shown on the digital display as they will differ, especially when the circulation pump is running. Final adjustments to system pressure must be made whilst referring to the digital pressure display. Condens 8300i W – 6721841533 (2022/12)

  • Page 23: Control Panel Overview

    Adjustment with casing removed in chimney sweep mode 1. Set the chimney sweep mode and start up the appliance at maximum rated output. 2. Set the chimney sweep mode and set the appliance at minimum rated output. Condens 8300i W – 6721841533 (2022/12)

  • Page 24: Combustion Casing Removal

    (NG), cylinder regulator (LPG), or pipe sizing (Ref AS/NZS5601). This must be resolved before proceeding. ▶ Exit the chimney sweep mode. ▶ Switch off the appliance, close the gas isolator, remove the pressure gauge and tighten the screw. Condens 8300i W – 6721841533 (2022/12)

  • Page 25: Checking For Gas Leaks During Operation

    If the pressure drops are greater than shown below, then this would indicate a problem with the pipe work or connections within the system. NOTICE Do not continue commissioning until the correct gas pressure is achieved. Condens 8300i W – 6721841533 (2022/12)

  • Page 26: Co And Combustion Check

    Turn off boiler Boiler is operating and contact CO < 350ppm satisfactorily. Bosch help line CO/CO ratio No further action < 0.004 is required. 0010042279-001 Fig. 33 Commissioning checks flow chart Condens 8300i W – 6721841533 (2022/12)

  • Page 27: Checking Flue Integrity

    ▶ Refit the test point plugs after the test has been completed. The flue gas analysis performance of the appliance can be checked via the flue turret/adaptor sample points. Refer to figure 35 for the location of the flue gas sample point on flue turret/adaptor. Condens 8300i W – 6721841533 (2022/12)

  • Page 28: Finishing Commissioning

    ▶ Give the customer details of how to contact the installer/ gas emergency numbers. ▶ Show the customer how to safely isolate the appliance. ▶ Advise the customer where they can find information on the Bosch Group website www.bosch-climate.com.au/ www.bosch-climate.co.nz.

  • Page 29: Settings In The Service Menu

    Documenting the settings The label “Service menu settings” (scope of delivery) makes it easier to restore the individual settings following maintenance. ▶ Enter modified settings. ▶ Affix label to the device in a visible location. Condens 8300i W – 6721841533 (2022/12)

  • Page 30: Service Menu

    Setting only if heating circuit 1 is connected behind the low loss header without module. • 2: heating pump behind the low loss header connected to the device (PW2) Table 18 Menu 2: hydraulic settings Condens 8300i W – 6721841533 (2022/12)
  • Page 31 3-d6 Overrun time of the heating pump in • 1 … 2 … 60 minutes The pump overrun begins at the end of the heat heating mode demand by the heating controller. • 24 hours Table 19 Menu 3: basic settings Condens 8300i W – 6721841533 (2022/12)
  • Page 32 If the outside temperature exceeds the set temperature limit, the heating is switched off (summer mode). If the outside temperature falls to at least 1 K ( °C) below the setting, the heating is switched back on (winter mode). Condens 8300i W – 6721841533 (2022/12)
  • Page 33 Limits the adjustment range for the domestic hot water temperature. 5-A3 Minimum output (heating and DHW) • GC8300iW 25 P: 10 ... 50 % • GC8300iW 35 P: 15 ... 50 % Table 21 Menu 5: limit values Condens 8300i W – 6721841533 (2022/12)
  • Page 34 • ON 0-A2 Set temperature in manual operation • OFF This service function is only available if service function 0-A1 is switched on. • 30 … 82 °C Table 23 Menu 0: manual operation Condens 8300i W – 6721841533 (2022/12)

  • Page 35: Thermal Disinfection

    ▶ Use heat conducting paste 8 719 918 658 0. reconnection. ▶ Use approved greases. HRisk of death from escaping flue gas! Escaping flue gas can cause poisoning. ▶ Check for leaks after working on flue gas-carrying components. Condens 8300i W – 6721841533 (2022/12)

  • Page 36: Checklist For Inspection And Maintenance

    ▶ Check and adjust the gas/air ratio. ▶ Affix the gas type label (included in the scope of delivery of the wall mounted boiler or gas type conversion set) to the wall mounted boiler next to the data plate. Condens 8300i W – 6721841533 (2022/12)

  • Page 37: Checking And, If Required, Adjusting The Gas/Air

    Liquid gas (LPG) Butane 11.9 11.2 Table 27 CO and O contents ▶ Measure the CO content. The CO content must be < 250 ppm. ▶ Set the minimum rated output. ▶ Measure the CO or O content. Condens 8300i W – 6721841533 (2022/12)

  • Page 38: Check The Gas Supply Pressure

    ▶ Set the chimney sweep mode and start up the device at minimum rated output. ▶ Exit the chimney sweep mode. ▶ Switch off the device, close the gas isolator, remove the pressure gauge and tighten the screw. ▶ Refit the casing. Condens 8300i W – 6721841533 (2022/12)

  • Page 39: Flue Gas Test

    Flue gas test port Combustion air test nipple ▶ Measure the O and the CO content. ▶ Press the " key. The device returns to normal operation. ▶ Remove the flue gas probe. ▶ Re-install the plug. Condens 8300i W – 6721841533 (2022/12)

  • Page 40: Checking The Burner

    ▶ Install the burner and the burner cover. 0010040965-001 ▶ Tighten the screw ([1], Fig. 45) on the burner cover with Fig. 48 Removing the mixing device 5.5+0.5 Nm. 1. Remove the non-return valve. Condens 8300i W – 6721841533 (2022/12)

  • Page 41: Checking The Electrical Wiring

    ▶ Remove the burner ( chapter 9.9, page 40). • GC8300iW 35 P < 3.5 mbar ▶ Clean heating block if necessary ( Chapter 9.14). ▶ Remove the pressure gauge. ▶ Attach cap to test port. ▶ Check the gas/air ratio. Condens 8300i W – 6721841533 (2022/12)

  • Page 42: Cleaning The Condensate Trap

    ▶ Only turn off the trap filling program during maintenance, and turn it back on at the end of maintenance. 0010019151-002 ▶ Make sure that the condensate drains off properly. Fig. 56 Aligning the new gasket with the condensate trap Condens 8300i W – 6721841533 (2022/12)

  • Page 43: Adjusting The Operating Pressure Of The Heating System

    ▶ Fill the hose with water to prevent air entering the heating system. ▶ Top up the water until the indicator is between 1 bar and 2 bar again. If pressure is not being maintained: ▶ Check the expansion vessel and heating system for leaks. Condens 8300i W – 6721841533 (2022/12)

  • Page 44: Checking/Replacing The Motor Of The 3-Way Valve

    ▶ Install the air/gas ratio control valve in reverse order, and check the gas/air ratio. 0010027500-002 Fig. 62 Detaching the motor from the 3-way valve (variant without screws) ▶ Push the motor down. ▶ Turn the motor clockwise as far as it will go. Condens 8300i W – 6721841533 (2022/12)

  • Page 45: Following Inspection/Maintenance

    Following inspection/maintenance ▶ Re-tighten all the threaded connections that have been released. ▶ Restart the device ( page 22). ▶ Check tightness of all joints. ▶ Check the gas/air ratio. ▶ Fit the casing. Condens 8300i W – 6721841533 (2022/12)

  • Page 46: Troubleshooting

    15.Check ignition electrode, replace if necessary. 16.Check ignition electrode connecting lead, replace if necessary. 17.Check flame sense electrode connecting lead, replace if necessary. 18.Check air/gas ratio control valve, replace if necessary. 19.Check control device/burner control unit, replace if necessary. Condens 8300i W – 6721841533 (2022/12)
  • Page 47 Replace control device. 242 - System fault boiler electronics / basic 1. Remedy contact problem. controller 2. If necessary, replace control device or boiler identification module/coding plug (Bosch contact customer service). Heat demand lower than energy supplied – Relay test was activated –...
  • Page 48 1. Install the flue system. 2. Remove any deposits from the flue system. 2914 - Boiler electr. system fault If the fault persists following a reset, the control device is faulty and must be replaced. 2916 Condens 8300i W – 6721841533 (2022/12)
  • Page 49 1. Perform reset. 2. Replace control device/burner control unit. 2946 V Incorrect code plug detected Replace boiler identification module/coding plug (Bosch contact customer service). 2948 B No flame signal with low output Burner starts automatically after purging. If this fault occurs frequently, check CO setting.
  • Page 50 The lock is removed and the unit returns to normal operation. 3. Double-check the last 10 faults in the fault history to confirm the fault has been remedied Table 30 Indicators and fault displays Condens 8300i W – 6721841533 (2022/12)

  • Page 51: 10.1.3 Faults That Are Not Displayed

    If the system pressure in the heating system drops below 0.3 bar, the display shows the message LoPr alternating with the operating pressure. The heating system is then blocked. ▶ Fill the heating system. Condens 8300i W – 6721841533 (2022/12)

  • Page 52: Shutdown

    You can find more information here: www.weee.bosch-thermotechnology.com/ Batteries Batteries must not be disposed together with your household waste. Used batteries must be disposed of in local collection systems. Condens 8300i W – 6721841533 (2022/12)

  • Page 53: Technical Information And Reports

    Max. permissible operating pressure (PMS), heating Permissible ambient temperature short time/long time °C 0 - 50/40 0 - 50/40 0 - 50/40 0 - 50/40 0 - 50/40 0 - 50/40 Heating water quantity Weight (without packaging) Condens 8300i W – 6721841533 (2022/12)

  • Page 54: Ionisation Current

    Number GC8300iW 25 P Natural gas 20460 Table 35 Outside temperature sensor (for weather-compensated Liquid gas (LPG) 20461 controllers, accessory) GC8300iW 35 P Natural gas 20462 Liquid gas (LPG) 20463 Table 37 Coding plug Condens 8300i W – 6721841533 (2022/12)

  • Page 55: Pump Characteristic Map Of The Heating Pump

    = 80/ 60 °C] 12,0 12,6 13,0 13,7 14,0 14,7 15,0 15,7 16,0 16,7 17,0 17,7 18,0 18,7 19,0 19,6 20,0 20,6 21,0 21,6 22,0 22,6 23,0 23,5 23,6 24,1 Table 38 GC8300iW 25 P Condens 8300i W – 6721841533 (2022/12)

  • Page 56: Electrical Wiring

    Technical information and reports 13.7 Electrical Wiring ON/OFF 230V 230V 230V 0010041065-001 Fig. 67 Electrical Wiring Condens 8300i W – 6721841533 (2022/12)
  • Page 57 [13] Coding plug [14] Terminal strip for external accessories ( terminal assignment from page 20) [15] Terminal for cylinder temperature sensor [16] 3-way valve [17] Connecting lead with plug [18] On/Off-switch [19] Earth bar (PE) Condens 8300i W – 6721841533 (2022/12)

  • Page 58: Commissioning Report For The Appliance

     Low loss header, type:  Additional expansion vessel  Heating pump: Size/pre-charge pressure: Automatic air vent valve present?  Yes |  No  DHW cylinder/type/number/heating surface output:  System hydraulics checked, Notes: Condens 8300i W – 6721841533 (2022/12)
  • Page 59 ___________________________________________________________ Name of service engineer __________________________________________________________ Date, user's signature Affix the test report here. ____________________________________________________________ Date, system installer's signature Table 40 Commissioning report Condens 8300i W – 6721841533 (2022/12)
  • Page 60 Bosch Thermotechnik GmbH Junkersstrasse 20-24 73249 Wernau, Germany www.bosch-thermotechnology.com...

This manual is also suitable for:

Gc8300iw 25 pGc8300iw 35 p

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