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TGB-40/60 Maintenance instructions
2 x top toggles
Gas fired condensing boiler with front casing removed
2 x bottom toggles
Safety instructions
Carry out the following steps before carrying out any
maintenance work.
• Switch OFF the system ON/OFF switch on the Wolf gas
fired boiler.
The mains terminals are ‘live‘ even when the
ON/OFF switch has been switched OFF.
• Switch OFF the emergency stop switch (or remove
fuses).
• Close the gas shut-off valve.
• Close the shut-off valves on the heating flow and
return, and drain the water from the boiler.
• Remove the front panel and protect it from damage.
Combustion chamber casing
Risk of burns
Several components may be hot. Let these cool down or
wear gloves.
Dismantling the combustion chamber unit
• Remove the combustion chamber housing after releasing
the toggles.
Control unit overview
ON/OFF switch