Wolf FGB-28 - Removing the Heat Exchanger

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28.8. Removing the heat exchanger
- Close the ow and return maintenance shut-off valves
- Open the drain valve
Emptying the condensing
boiler on the heating water side
- Open the manual air vent valve
- Disconnect the plugs for the ow temperature sensor, high limit safety cut-out
and ue gas temperature
- Disconnect the return sensor and pressure sensor plugs
- Release the retaining clips
- Undo the pump tting
- Remove the pipes
Removingtheowand
return pipes