Dunkirk Helix VLT Vertical Laser Tube, Wall Hung Modulating Condensing Boiler - Manual (Page 45)

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• Remove ¼-20 hex flange nuts securing condensate
collector to heat exchanger using 7/16" deep well
socket. See figures 11-3 & 11-4.
• Remove condensate collector assembly from heat
exchanger and flue pipe.
• Flush collector and condensate trap with water.
• Follow Burner Inspection Kit instructions to reassemble
boiler and resume operation.
11 - GENERAL MAINTENANCE AND CLEANING