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Condensate trap must be manually filled with water
Note
at initial start up.
FIGURE 9-1 Condensate Drain Assembly
150-299 MBH shown
Disconnect spring tension
clip from hose barb and fill
Condensate trap with water.
50-100 MBH shown
Reconnect hose to hose
barb with spring tension clip
before starting boiler.
9 - START UP PROCEDURE
9.1 Fill Boiler With Water And Purge Air
Note
• 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 14. Purge air from boiler using air
vent. Purge air from system piping.
• Close air vent after all air is purged from both boiler
and 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.
38
To maintain boiler efficiency and prevent boiling
inside the heat exchanger, flush entire heating
system until clean.
PN 240011320 Rev. G 10/01/2021]
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