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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

  • A
    amandagoodmanSep 8, 2025
    How to fix faulty stratification sensor on Wolf COB?
    • S
      Sheila MitchellSep 8, 2025
      If the Wolf Boiler displays a faulty stratification sensor, it indicates a problem with the stratification cylinder sensor or its lead. Check the sensor and lead to resolve this.
  • A
    Andrew RomeroSep 12, 2025
    How to fix header sensor fault on Wolf Boiler?
    • R
      Richard CollinsSep 12, 2025
      If the Wolf Boiler indicates a faulty header sensor, there is likely an issue with the sensor or its lead. Check the sensor and lead to troubleshoot.
  • A
    Alexandra MartinSep 12, 2025
    Why Wolf COB Boiler has insufficient water pressure?
    • B
      Brian RamirezSep 13, 2025
      If the Wolf Boiler displays insufficient water pressure, it's because the pressure switch isn't activating due to low water pressure (below 0.8 bar). Ensure the system pressure is above 1.5 bar, inspect the water pressure switch and its lead, and then press the reset button.
  • R
    Ryan HoSep 14, 2025
    What to do if Wolf COB condensate pump not pumping?
    • M
      Marc MartinezSep 15, 2025
      If the condensate pump in your Wolf Boiler is not pumping, it could be due to a defective pump, a blocked drain line, or a missing power supply. Check the pump itself, inspect the drain line for blockages, and verify the mains plug and fuse.
  • L
    ljenkinsSep 16, 2025
    Why Wolf COB has max cylinder heating time exceeded?
    • C
      Carolyn BanksSep 17, 2025
      If the Wolf Boiler exceeds the maximum cylinder heating time, it means the set cylinder temperature hasn't been reached with sufficient flow. Try venting the cylinder, increasing the cylinder heating time (HG20), and checking the cylinder sensor installation.

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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