Wolf TGB-40 Maintenance Instructions Manual page 41

• Slacken the ventilation pipe union nut towards the quick
acting air-vent valve and remove the whole quick acting
vent valve upwards.
• Undo screw from the lid/rear panel.
• Release the flow and return compression fittings.
• Unscrew the boiler siphon.
On some boilers the safety panel must first be removed.
Drain the siphon and flush out any sediment.
• Push the flue pipe damper upwards.
On some boilers a hose clip needs to be released first, on
others simply push a leaf spring behind the differential
pressure switch aside.
TGB-40/60 Maintenance instructions
Union nut for ventilation pipe
Location of union nut / lid / rear panel
Flow compression fitting
Location of compression fittings
Boiler siphon
Location of boiler siphon
Leaf spring
Lid screw - rear panel
Return compression fitting
Flue pipe damper
41