Pat_M said:
Yes, you can clean the tubes without removing the ESP probe. In fact, in the Harman installation manual it lists cleaning the tubes before it mentions cleaning the ESP. In fact, it classifies the tubes as part of monthly cleaning and the ESP for 1 ton cleaning.
STEP #4: CLEAN THE ESP PROBE
Using a 5/16†socket or nut driver remove
the tek screw holding the ESP probe (Fig. 14).
Gently remove the probe by pulling it straight out of the
housing; be careful not to bend the probe. The probe can
be cleaned by very gently rubbing off the soot with a green
scrub (Fig. 15), do not use emery cloth or sandpaper. If you don’t
have a scrub use no more than a cloth or paper towel. Do not replace the sensor
until after you have brushed the combustion blower air passage.
This is part of step six
These tubes are an important part of the heat
exchanger, efficiency will be lost if they are not
properly maintained and if this step is not performed over a long enough period of time the
exhaust tubes will become clogged causing the stove to operate sluggishly or not at all.
Note: Be sure to brush any soot from side interior panels especially the interior side of the
insert’s front panel where a cast iron ridge may hold soot.
After completing this step, reassemble the cast iron heat exchanger panels into the stove along
with the flame guide and “compass panel.†Reinstall the Thermister (ESP) probe, being careful
not to damage it, using a 5/16†socket or nut driver (same procedure as Fig. 14). Be careful not to
bend or damage the probe in any way.
this is the website i looked up
(broken link removed to http://www.harmanstoves.com/Customer-Care/~/media/Files/Site) Downloads/HAR/CleaningInstructions/AccentraInsertCleaningInstructions.ashx
thanks