Installation
2-6
750-297
Profire E/LNE Series Manual
When retrofitting a heat exchanger, if a flame-shaping dry oven was used with the previous burner, discard that
dry oven.
Dry Oven Installation:
The face of the boiler and refractory dry oven flange must be sealed with asbestos-free ceramic fiber blanket or
rope gasket to prevent emission-gas leakage.
Firetube installation requires the space between the dry oven's outer diameter and the firetube's furnace diameter
to be soft packed as follows:
•
Apply tack spray to the outer circumference of the refractory dry oven to help hold ceramic fiber blanket in
place.
•
Wrap the outer diameter of the dry oven with ceramic fiber blanket while leaving a 1" space from the dry
oven's front edge to the blanket wrap. The wrap must fill the gap between the refractory outside diameter and
the firetube's internal diameter. The 1" recess keeps the blanket edge from eroding.
•
Use masking tape to both secure and compress the ceramic fiber blanket around the dry oven. The wrapped
ceramic fiber blanket must provide a snug fit between the dry oven and the heat exchanger. If necessary,
rework to fill voids in this gap.
•
Remove excess ceramic fiber blanket.
Burner to boiler-mounted dry oven installation:
•
Make sure the dry oven and burner blast tube are concentric.
•
The burner flange must be sealed to prevent emission gas leakage. To seal the flange, use the provided flange
gasket or ceramic fiber blanket trimmed to fit.
FIGURE 2-4.
Dry Oven Detail