Dunkirk Helix VLT Vertical Laser Tube, Wall Hung Modulating Condensing Boiler - Manual (Page 36)

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9.1 Fill Boiler With Water And Purge Air
NOTICE
To maintain boiler efficiency and prevent boiling
inside the heat exchanger, flush entire heating
system until clean.
• Flush heating system, including all heating zones.
• Fill boiler with potable water.
• Fill boiler and system piping with water (or
antifreeze-water solution, if used). See antifreeze
information page 13. Purge air from boiler using air
vent. Purge air from system piping.
• Inspect system piping and boiler connections. Repair
any leaks immediately.
• Activate all heating zones and calls for heat,
including CH calls and DHW calls (if available).
• Close manual gas shut off valve. Let system run for
30 minutes. When boiler goes into lockout, reset
boiler by pressing "Reset" button until boiler resets.
• Do not open gas shutoff valve until all air is purged
from system.
9.2 Fill Condensate Trap with Water
• Disconnect spring tension clip from condensate hose
barb. See figure 9-1.
• Disconnect tubing below from hose barb.
• Pour approximately 2 cups (473 ml) of water into
condensate drain.
• Reconnect tubing to hose barb with spring tension
clip. See figure 9-1.
FIGURE 9-1 Condensate Drain Assembly
NOTICE
IMPORTANT: Condensate trap must be manually
filled with water at initial start up.
2. Reconnect hose to hose
barb with spring tension clip
before starting boiler.
1. Disconnect spring tension
clip from hose barb and fill
Condensate trap with water.
9 - START UP PROCEDURE