3-5
STARTUP AND COMMISSIONING
HC SERIES BOILERS
HC 13-50, HC 23-84, HC 29-106, HC 33-124, HC 20-125, HC 33-160
Figure 35: Blower and Gas Valve Assembly
Figure 36: Orifice and O-ring
WARNING
Fan Outlet Orifice (25mm)
must be installed in the DC
23-84 model. If the fan is
being replaced the orifice
must be reinstalled in the new
fan.