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18. Filling the heating system / trap
Fig.: Trap
Trap
Prior to opening the gas ball valve and acknowledging
the fault
• Fill the trap from above through the inspection port
in the ue pipe / bend.
Fill only through the ue; do not ll water
into the ventilation air aperture, as this could
cause the burner to malfunction.
• Reopen the gas ball valve.
Filling the trap
Fig.: Trap - lling via ue
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