Wolf FGB-K Series Installation And Maintenance Instructions For Contractors page 48

Filling the trap
Fig.: Trap - filling via flue
Trap
Fig.: Trap
48
18. Filling the heating system / trap
Prior to opening the gas ball valve and acknowledging
the fault
in the flue pipe / bend.
• Reopen the gas ball valve.
• Fill the trap from above through the inspection port
Fill only through the flue; do not fill water
into the ventilation air aperture, as this could
cause the burner to malfunction.
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