38
Remove burner being careful to not
damage the igniter or ground
electrodes.
3. Thoroughly clean burner using water or
air. Check all ports and air channels for
blockage.
4. Reinstall the burner being careful to fully
engage the back of the burner box into
the retaining slot in the combustion
chamber base. Failure to properly locate
the burner will result in erratic flame
operation with the possibility of delayed
ignition on light off.
5. Restore electrical power and gas supply
to the appliance.
Following the lighting instructions
put
the
appliance
back
into
operation
Check for gas leaks and proper
appliance and vent operation.
10.2.
PILOT BURNER
Turn the pilot firing valve to off position and
allow the appliance to try for ignition. Observe
the spark making sure that it is strong and
continuous.
If the spark is not acceptable the igniter will have
to
be
adjusted.
This
can
be
readily
accomplished after removing the main burner.
The spark gap should be 1/8” to 3/16” between
igniter and ground rod and 3/8” between igniter
and surface of metal fiber. Make sure that the
electrode does not appear overheated or fouled
with carbon. It may be necessary to clean the
ignition electrode using steel wool. Once the
pilot appears to be properly set, reinstall it into
the appliance making sure to properly tighten
the pilot line connection.
If the pilot is removed from the main burner in
the course of servicing the appliance, it is
important to reinstall it so that there is no gap
between the top surface of the pilot tube and the
underside of the metal filter support screen.
When properly set it will not be possible to slip a
business card between the pilot burner and the
support screen. Figure 15 shows the burner box
assembly with the metal filter cover removed to
expose pilot tube.
Figure 15 – Pilot and Burner Box
Once the spark is satisfactory, open the pilot gas
and allow the pilot burner to light. Once air has
been purged from the pilot line, the pilot flame
should appear almost instantly at the initiation of
spark. Cycle the pilot several times to confirm
reliability. A properly set pilot will appear blue
and will engulf the igniter and ground electrode.
Open the firing valve and allow the main burner
to light. The pilot must not extinguish. After
running for 15 minutes, cycle the appliance to
ensure that the pilot remains stable.
Summary of Contents for MICOFLAME GRANDE Series
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Page 20: ...16 Figure 7 Typical Heating System ...
Page 21: ...17 Figure 8 Typical Low Water Temperature System Figure 9 Typical Instantaneous Water System ...
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Page 49: ...45 16 EXPLODED VIEW MicoFlame Grande ...
Page 50: ...46 EXPLODED VIEW MicoFlame Grande Outdoor and or Condensing ...