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Wolf COB Series - User Manual

Wolf COB Series
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WOLF GMBH / POSTFACH 1380 / D-84048 MAINBURG / TEL. +49.0.875174-0 / FAX +49.0.875174-1600 / www.WOLF.eu
Art.-Nr. 3065081_201806
Änderungen vorbehalten /
Subject to modifications
Ölpumpe COB-20/29/40 - Einstellung Pumpendruck
Oil pump COB-20/29/40 - Setting pump pressure
Werkseinstellung Pumpendruck COB-20/29 /
factory setting pump pressure COB-20/29
ST 1 (Stufe 1/Stage 1) = 8,5 ± 1,0 bar
ST 2 (Stufe 2/Stage 2) = 16,8 ± 2,5 bar
Einstellung Pumpendruck COB-40 /
Setting pump pressure COB-40
COB-40 COB-29 COB-20 COB-15
ST1
ST2
ST1
ST2
SW 8
1½ x
½ x
SW 8
¼ x
¼ x
Pumpendruck /
Pump pressure
ST1
ST2
11,0 ± 1,0 bar
23,5 ± 2,5 bar
9,8 ± 1,0 bar
18,0 ± 2,5 bar
8,5 ± 1,0 bar
16,8 ± 2,5 bar
Kurzbedienungsanleitung -
Short operating instructions

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Questions and Answers

  • D
    Derek GibbsAug 19, 2025
    How to fix HLSC excess temp on Wolf Boiler?
    • A
      Ashley SheltonAug 19, 2025
      If the Wolf Boiler's flow temperature exceeds 110 °C, it triggers the HLSC excess temperature error. To resolve this, you should test the heating circuit pump, vent the system, press the reset button, and clean the heat exchanger.
  • J
    Jasmine StewartAug 21, 2025
    What to do if Wolf Boiler shows flue gas sensor, excess temperature?
    • S
      Shannon Torres MDAug 22, 2025
      If the flue gas temperature on your Wolf Boiler has exceeded 120 °C, triggering the flue gas sensor, excess temperature error, you should clean the heat exchanger. Also, verify that all displacement devices are installed, check the flow through the boiler, ensure the flow and return are properly connected, and then press the reset button.
  • A
    adamskelliAug 25, 2025
    What to do if Wolf COB Boiler displays temperature limiter - excess temperature?
    • M
      Maria MartinezAug 25, 2025
      If the flow in your Wolf Boiler exceeds the temperature limiter's limit of 100 °C, triggering the temperature limiter excess temperature error, you should vent the system and check the heating circuit pump.
  • C
    Cassidy McmillanAug 26, 2025
    Why Wolf COB has none flame established?
    • E
      Emily DonaldsonAug 26, 2025
      If your Wolf Boiler fails to establish a flame, it could be due to several reasons: a contaminated inspection window for the flame monitor/mixer head, a faulty flame monitor, air in the oil line, excessive negative or overpressure at the oil pump, or a contaminated boiler. Suggested solutions include: checking the oil line and fuel level, inspecting the ignition electrode and transformer, pressing reset, cleaning the inspection window, checking the flame monitor and lead, ensuring proper condensate drainage, or arranging for professional service.
  • E
    Elizabeth CordovaAug 27, 2025
    What to do if Wolf COB has flame failure during operation?
    • S
      scottelizabethAug 28, 2025
      If the Wolf Boiler experiences flame failure during operation, it may be due to excessive negative pressure on the oil pump, flue gas return in the supply air, or a contaminated boiler. To address this, check CO values, inspect the flame monitor and lead, press reset, check the fuel system for leaks, or seek professional service.
  • S
    Stephanie RamosAug 29, 2025
    How to fix flue gas/supply air damper that does not respond on Wolf COB?
    • A
      Amanda JacksonAug 30, 2025
      If the Wolf Boiler's flue gas/ventilation air damper contact (E1) fails to close or open when there is a demand, you should check the flue gas/ventilation air damper and its wiring.
  • M
    Melanie CampbellSep 1, 2025
    Why Wolf COB Boiler has insufficient heating system heating, frequent cycling?
    • C
      Chad TylerSep 1, 2025
      If your Wolf Boiler is not sufficiently heating the system and is cycling frequently, it could be due to air in the heating or cylinder system. You should vent the radiators, cylinder primary circuit, heating circuit pumps, and the boiler itself.
  • M
    Melissa HicksSep 2, 2025
    How to fix faulty boiler sensor on Wolf COB Boiler?
    • R
      Ronald ReedSep 2, 2025
      If the Wolf Boiler shows a faulty boiler sensor, it indicates a problem with the sensor or its lead. Check the sensor and lead to resolve this issue.
  • M
    Melissa MorrisSep 4, 2025
    How to fix faulty cylinder sensor SF on Wolf COB Boiler?
    • K
      Kelly SantosSep 5, 2025
      If the Wolf Boiler displays a faulty cylinder sensor SF, it indicates an issue with the sensor or its lead. Check the sensor and lead to resolve the problem.
  • N
    Nathaniel ManningSep 7, 2025
    How to fix outside temperature sensor faulty on Wolf COB?
    • A
      Adam GutierrezSep 7, 2025
      If the Wolf Boiler indicates a faulty outside temperature sensor, it means there is an issue with the sensor or its lead. Check the sensor and lead.

Wolf COB Series Specifications

General IconGeneral
Combustion TypeCondensing
Fuel TypeNatural Gas
EfficiencyUp to 98%
Ignition SystemElectronic Ignition
Modulation Ratio10:1
Heating Capacity399, 000 BTU/hr
WeightVaries by model
Dimensions (HxWxD)Varies by model
NOx EmissionsLow NOx

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