Servicing
Instructions
8.9-3
3
4. Check the orifice for blockages at all twelve holes.
Blow out or brush off as necessary. Also, blow or
brush off the burner plate. If the orifice holes cannot
be freed of blockages, then replace the orifice. Do not
attempt to poke any instruments into the holes.
5. To remove the orifice, pry off either of the retaining
rings holding the orifice in place. The replacement
orifice ships with both bowed and flat retaining rings.
The flat retaining ring holds the orifice on the flame
side of the burner plate. The bowed retaining ring
holds the orifice in place on the gas inlet side of the
orifice.
6. Reassemble all components.
7. Restart the heater. Check for proper burner flame
characteristics and for gas leaks.
August 1999
Orifice
Retaining
Ring
Burner and Burner Orifice