3-5
STARTUP AND COMMISSIONING
HC SERIES BOILERS HC 13-50, HC 23-84, HC 29-106, HC 20-125, HC 33-160
Back Flow Insert
Figure 35: Blower and Gas Valve Assembly
Figure 36: Orice and O-ring
WARNING
Fan Outlet Orice (25mm)
must be installed in the DC
23-84 model. If the fan is
being replaced the orice
must be reinstalled in the new
fan.
WARNING
When converting a Natural
Gas boiler to Propane,
the Back Flow Flapper
must be replaced with the
Propane Back Flow Flapper
(see instructions in fuel
conversion kit). Failure to
replace the Flapper may
result in damage to the boiler,
serious injury or death.
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